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* [Bug 1861161] [NEW] qemu-arm-static 100% CPU when cross-compiling emacs on alpine
@ 2020-01-28 15:37 Philippe Vaucher
  2020-01-28 15:57 ` [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs Philippe Vaucher
                   ` (8 more replies)
  0 siblings, 9 replies; 10+ messages in thread
From: Philippe Vaucher @ 2020-01-28 15:37 UTC (permalink / raw)
  To: qemu-devel

Public bug reported:

Hello,

I'm trying to build multi-arch docker images for
https://hub.docker.com/r/silex/emacs.

Here is the machine I'm building on (hetzner cloud machine):

root@ubuntu-4gb-fsn1-1:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.3 LTS
Release:        18.04
Codename:       bionic
root@ubuntu-4gb-fsn1-1:~# uname -a
Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Whenever I try to build the following alpine Dockerfile
https://gitlab.com/Silex777/docker-
emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:

$ sysctl kernel.randomize_va_space=0
$ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
$ docker build --pull -t test --platform arm .

It builds fine until this:

root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el

This is supposed to take a few seconds, but in practice it takes 100%
CPU and never ends. When I strace the process I see a never ending loop
like this:

getdents64(5, /* 0 entries */, 2048)    = 0
lseek(5, 0, SEEK_SET)                   = 0
getdents64(5, /* 5 entries */, 2048)    = 120
tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
getdents64(5, /* 0 entries */, 2048)    = 0
lseek(5, 0, SEEK_SET)                   = 0
getdents64(5, /* 5 entries */, 2048)    = 120
tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
getdents64(5, /* 0 entries */, 2048)    = 0
lseek(5, 0, SEEK_SET)                   = 0
getdents64(5, /* 5 entries */, 2048)    = 120
tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
getdents64(5, /* 0 entries */, 2048)    = 0
lseek(5, 0, SEEK_SET)                   = 0
getdents64(5, /* 5 entries */, 2048)    = 120
tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
getdents64(5, /* 0 entries */, 2048)    = 0
lseek(5, 0, SEEK_SET)                   = 0
getdents64(5, /* 5 entries */, 2048)    = 120
tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)

It happens with all the QEMU versions I tested:
- 2.11.1 (OS version)
- 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
- 4.2.0-2 (from multiarch/qemu-user-static)

Any ideas of what I could do to debug it further?

Kind regards,
Philippe

p.s: Everything builds fine when the base image is ubuntu. I also had
similar hangs with basic commands like "apt-get install foo" sometimes.

** Affects: qemu
     Importance: Undecided
         Status: New

** Description changed:

  Hello,
  
  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.
  
  Here is the machine I'm building on:
  
  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
  
  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile with this command:
  
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .
  
  It builds fine until this:
  
  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el
  
  This is supposed to take a few seconds, but in practice it takes 100%
  CPU and never ends. When I strace the process I see this:
  
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  
- It happens with all the QEMU versions I tested: 
+ It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)
  
  Any ideas of what I could do to debug it further?
  
  Kind regards,
  Philippe
+ 
+ p.s: Everything builds fine when the base image is ubuntu. I also had
+ similar hangs with basic commands like "apt-get install foo" sometimes.

** Description changed:

  Hello,
  
  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.
  
  Here is the machine I'm building on:
  
  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
  
  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile with this command:
  
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .
  
  It builds fine until this:
  
  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el
  
  This is supposed to take a few seconds, but in practice it takes 100%
- CPU and never ends. When I strace the process I see this:
+ CPU and never ends. When I strace the process I see a never ending loop
+ like this:
  
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  
  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)
  
  Any ideas of what I could do to debug it further?
  
  Kind regards,
  Philippe
  
  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo" sometimes.

** Description changed:

  Hello,
  
  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.
  
  Here is the machine I'm building on:
  
  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
  
  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
- emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile with this command:
+ emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:
  
+ $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .
  
  It builds fine until this:
  
  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el
  
  This is supposed to take a few seconds, but in practice it takes 100%
  CPU and never ends. When I strace the process I see a never ending loop
  like this:
  
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  
  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)
  
  Any ideas of what I could do to debug it further?
  
  Kind regards,
  Philippe
  
  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo" sometimes.

** Description changed:

  Hello,
  
  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.
  
- Here is the machine I'm building on:
+ Here is the machine I'm building on (hetzner cloud machine):
  
  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
  
  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:
  
  $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .
  
  It builds fine until this:
  
  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el
  
  This is supposed to take a few seconds, but in practice it takes 100%
  CPU and never ends. When I strace the process I see a never ending loop
  like this:
  
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  
  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)
  
  Any ideas of what I could do to debug it further?
  
  Kind regards,
  Philippe
  
  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo" sometimes.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1861161

Title:
  qemu-arm-static 100% CPU when cross-compiling emacs on alpine

Status in QEMU:
  New

Bug description:
  Hello,

  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.

  Here is the machine I'm building on (hetzner cloud machine):

  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:

  $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .

  It builds fine until this:

  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el

  This is supposed to take a few seconds, but in practice it takes 100%
  CPU and never ends. When I strace the process I see a never ending
  loop like this:

  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)

  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)

  Any ideas of what I could do to debug it further?

  Kind regards,
  Philippe

  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo"
  sometimes.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1861161/+subscriptions


^ permalink raw reply	[flat|nested] 10+ messages in thread
* [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs
  2020-01-28 15:37 [Bug 1861161] [NEW] qemu-arm-static 100% CPU when cross-compiling emacs on alpine Philippe Vaucher
@ 2020-01-28 15:57 ` Philippe Vaucher
  2020-01-28 16:50 ` Peter Maydell
                   ` (7 subsequent siblings)
  8 siblings, 0 replies; 10+ messages in thread
From: Philippe Vaucher @ 2020-01-28 15:57 UTC (permalink / raw)
  To: qemu-devel

** Summary changed:

- qemu-arm-static 100% CPU when cross-compiling emacs on alpine
+ qemu-arm-static stuck with 100% CPU when cross-compiling emacs

** Description changed:

  Hello,
  
  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.
  
  Here is the machine I'm building on (hetzner cloud machine):
  
  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
  
  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:
  
  $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .
  
  It builds fine until this:
  
  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el
  
- This is supposed to take a few seconds, but in practice it takes 100%
- CPU and never ends. When I strace the process I see a never ending loop
- like this:
+ This is supposed to take a few seconds, but here it takes 100% CPU and
+ never ends. When I strace the process I see a never ending loop like
+ this:
  
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  
  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)
  
  Any ideas of what I could do to debug it further?
  
  Kind regards,
  Philippe
  
  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo" sometimes.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1861161

Title:
  qemu-arm-static stuck with 100% CPU when cross-compiling emacs

Status in QEMU:
  New

Bug description:
  Hello,

  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.

  Here is the machine I'm building on (hetzner cloud machine):

  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:

  $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .

  It builds fine until this:

  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el

  This is supposed to take a few seconds, but here it takes 100% CPU and
  never ends. When I strace the process I see a never ending loop like
  this:

  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)

  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)

  Any ideas of what I could do to debug it further?

  Kind regards,
  Philippe

  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo"
  sometimes.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1861161/+subscriptions


^ permalink raw reply	[flat|nested] 10+ messages in thread
* [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs
  2020-01-28 15:37 [Bug 1861161] [NEW] qemu-arm-static 100% CPU when cross-compiling emacs on alpine Philippe Vaucher
  2020-01-28 15:57 ` [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs Philippe Vaucher
@ 2020-01-28 16:50 ` Peter Maydell
  2020-01-28 18:01 ` Philippe Vaucher
                   ` (6 subsequent siblings)
  8 siblings, 0 replies; 10+ messages in thread
From: Peter Maydell @ 2020-01-28 16:50 UTC (permalink / raw)
  To: qemu-devel

Given the presence of getdents64 in the strace, I wonder if you are
running into LP:1805913. You could test this theory by running the test
with a host filesystem that is not ext4.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1861161

Title:
  qemu-arm-static stuck with 100% CPU when cross-compiling emacs

Status in QEMU:
  New

Bug description:
  Hello,

  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.

  Here is the machine I'm building on (hetzner cloud machine):

  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:

  $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .

  It builds fine until this:

  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el

  This is supposed to take a few seconds, but here it takes 100% CPU and
  never ends. When I strace the process I see a never ending loop like
  this:

  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)

  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)

  Any ideas of what I could do to debug it further?

  Kind regards,
  Philippe

  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo"
  sometimes.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1861161/+subscriptions


^ permalink raw reply	[flat|nested] 10+ messages in thread
* [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs
  2020-01-28 15:37 [Bug 1861161] [NEW] qemu-arm-static 100% CPU when cross-compiling emacs on alpine Philippe Vaucher
  2020-01-28 15:57 ` [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs Philippe Vaucher
  2020-01-28 16:50 ` Peter Maydell
@ 2020-01-28 18:01 ` Philippe Vaucher
  2020-01-29 18:07 ` Philippe Vaucher
                   ` (5 subsequent siblings)
  8 siblings, 0 replies; 10+ messages in thread
From: Philippe Vaucher @ 2020-01-28 18:01 UTC (permalink / raw)
  To: qemu-devel

Thanks. It matches my bug because ubuntu:18.04 has a glibc 2.27 while
alpine 3.9 has glib 2.58, and your bug report mentions that 2.27 has not
the bug, so it makes sense.

However I don't see how not having the host filesystem as ext4 would
change anything, can you elaborate? Also, what filesystem do you
recommand?

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1861161

Title:
  qemu-arm-static stuck with 100% CPU when cross-compiling emacs

Status in QEMU:
  New

Bug description:
  Hello,

  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.

  Here is the machine I'm building on (hetzner cloud machine):

  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:

  $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .

  It builds fine until this:

  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el

  This is supposed to take a few seconds, but here it takes 100% CPU and
  never ends. When I strace the process I see a never ending loop like
  this:

  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)

  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)

  Any ideas of what I could do to debug it further?

  Kind regards,
  Philippe

  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo"
  sometimes.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1861161/+subscriptions


^ permalink raw reply	[flat|nested] 10+ messages in thread
* [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs
  2020-01-28 15:37 [Bug 1861161] [NEW] qemu-arm-static 100% CPU when cross-compiling emacs on alpine Philippe Vaucher
                   ` (2 preceding siblings ...)
  2020-01-28 18:01 ` Philippe Vaucher
@ 2020-01-29 18:07 ` Philippe Vaucher
  2020-01-29 19:33 ` Philippe Vaucher
                   ` (4 subsequent siblings)
  8 siblings, 0 replies; 10+ messages in thread
From: Philippe Vaucher @ 2020-01-29 18:07 UTC (permalink / raw)
  To: qemu-devel

Okay, currently testing XFS. Using newer version of glibc on alpine
triggered other problems, like 0% CPU processes stuck on FUTEX_WAIT.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1861161

Title:
  qemu-arm-static stuck with 100% CPU when cross-compiling emacs

Status in QEMU:
  New

Bug description:
  Hello,

  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.

  Here is the machine I'm building on (hetzner cloud machine):

  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:

  $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .

  It builds fine until this:

  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el

  This is supposed to take a few seconds, but here it takes 100% CPU and
  never ends. When I strace the process I see a never ending loop like
  this:

  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)

  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)

  Any ideas of what I could do to debug it further?

  Kind regards,
  Philippe

  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo"
  sometimes.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1861161/+subscriptions


^ permalink raw reply	[flat|nested] 10+ messages in thread
* [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs
  2020-01-28 15:37 [Bug 1861161] [NEW] qemu-arm-static 100% CPU when cross-compiling emacs on alpine Philippe Vaucher
                   ` (3 preceding siblings ...)
  2020-01-29 18:07 ` Philippe Vaucher
@ 2020-01-29 19:33 ` Philippe Vaucher
  2020-03-22  8:50 ` Philippe Vaucher
                   ` (3 subsequent siblings)
  8 siblings, 0 replies; 10+ messages in thread
From: Philippe Vaucher @ 2020-01-29 19:33 UTC (permalink / raw)
  To: qemu-devel

Building on XFS does the same thing :-( To test I bind mounted my XFS
partition on `/var/lib/docker` so everything docker was stored on XFS.
Not sure if this is what you meant.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1861161

Title:
  qemu-arm-static stuck with 100% CPU when cross-compiling emacs

Status in QEMU:
  New

Bug description:
  Hello,

  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.

  Here is the machine I'm building on (hetzner cloud machine):

  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:

  $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .

  It builds fine until this:

  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el

  This is supposed to take a few seconds, but here it takes 100% CPU and
  never ends. When I strace the process I see a never ending loop like
  this:

  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)

  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)

  Any ideas of what I could do to debug it further?

  Kind regards,
  Philippe

  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo"
  sometimes.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1861161/+subscriptions


^ permalink raw reply	[flat|nested] 10+ messages in thread
* [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs
  2020-01-28 15:37 [Bug 1861161] [NEW] qemu-arm-static 100% CPU when cross-compiling emacs on alpine Philippe Vaucher
                   ` (4 preceding siblings ...)
  2020-01-29 19:33 ` Philippe Vaucher
@ 2020-03-22  8:50 ` Philippe Vaucher
  2020-11-05 10:57 ` Peter Maydell
                   ` (2 subsequent siblings)
  8 siblings, 0 replies; 10+ messages in thread
From: Philippe Vaucher @ 2020-03-22  8:50 UTC (permalink / raw)
  To: qemu-devel

I tried several workarounds including removing `dir_index` from ext4
partitions and using a 32 bit qemu-user-static version, but it does not
work:

The process still gets stuck in a loop involving `getdents64`:


```
root@earth:~# file /usr/bin/qemu-arm-static
/usr/bin/qemu-arm-static: ELF 32-bit LSB executable, Intel 80386, version 1 (GNU/Linux), statically linked, for GNU/Linux 3.2.0, BuildID[sha1]=ff1224d87ca5dece8d0b0f5735cfee7fae97ee58, stripped

root@earth:~# ps afx | grep qemu
21031 pts/0    S+     0:00          \_ grep --color=auto qemu
 1036 ?        Ss     0:00 /usr/sbin/qemu-ga --daemonize -m virtio-serial -p /dev/virtio-ports/org.qemu.guest_agent.0
10584 ?        Ssl    0:00      |   |   \_ /usr/bin/qemu-arm-static /usr/bin/make install
28768 ?        Sl     0:01      |   |       \_ /usr/bin/qemu-arm-static /usr/bin/make -C src VCSWITNESS=$(srcdir)/../.git/logs/HEAD all
16718 ?        Sl     0:00      |   |           \_ /usr/bin/qemu-arm-static /usr/bin/make -C ../lisp compile-first EMACS=../src/bootstrap-emacs
16726 ?        Rl    48:24      |   |               \_ /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el
10696 ?        Ssl    0:00      |       \_ /usr/bin/qemu-aarch64-static /usr/bin/make install
10972 ?        Sl     0:02      |           \_ /usr/bin/qemu-aarch64-static /usr/bin/make -C src VCSWITNESS=$(srcdir)/../.git/logs/HEAD all
20397 ?        Sl     0:00      |               \_ /usr/bin/qemu-aarch64-static /usr/bin/make -C ../lisp compile-first EMACS=../src/bootstrap-emacs
20405 ?        Rl    24:09      |                   \_ /usr/bin/qemu-aarch64-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el

root@earth:~# strace -p 16726
clock_gettime(CLOCK_REALTIME, {tv_sec=1584794027, tv_nsec=921230669}) = 0
getdents64(5, /* 0 entries */, 2048)    = 0
_llseek(5, 0, [0], SEEK_SET)            = 0
getdents64(5, /* 5 entries */, 2048)    = 144
tgkill(29984, 29987, SIGRT_2)           = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_REALTIME, {tv_sec=1584794027, tv_nsec=921642405}) = 0
getdents64(5, /* 0 entries */, 2048)    = 0
_llseek(5, 0, [0], SEEK_SET)            = 0
getdents64(5, /* 5 entries */, 2048)    = 144
tgkill(29984, 29987, SIGRT_2)           = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_REALTIME, {tv_sec=1584794027, tv_nsec=922333065}) = 0
getdents64(5, /* 0 entries */, 2048)    = 0
_llseek(5, 0, [0], SEEK_SET)            = 0
getdents64(5, /* 5 entries */, 2048)    = 144
tgkill(29984, 29987, SIGRT_2)           = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_REALTIME, ^C{tv_sec=1584794027, tv_nsec=923201432}) = 0
strace: Process 16726 detached
```

What is interesting is that the qemu-aarch64-static process also get
stuck, which if I understand the bug correctly should not happen. I'll
try stracing the process to figure out what happens.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1861161

Title:
  qemu-arm-static stuck with 100% CPU when cross-compiling emacs

Status in QEMU:
  New

Bug description:
  Hello,

  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.

  Here is the machine I'm building on (hetzner cloud machine):

  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:

  $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .

  It builds fine until this:

  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el

  This is supposed to take a few seconds, but here it takes 100% CPU and
  never ends. When I strace the process I see a never ending loop like
  this:

  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)

  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)

  Any ideas of what I could do to debug it further?

  Kind regards,
  Philippe

  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo"
  sometimes.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1861161/+subscriptions


^ permalink raw reply	[flat|nested] 10+ messages in thread
* [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs
  2020-01-28 15:37 [Bug 1861161] [NEW] qemu-arm-static 100% CPU when cross-compiling emacs on alpine Philippe Vaucher
                   ` (5 preceding siblings ...)
  2020-03-22  8:50 ` Philippe Vaucher
@ 2020-11-05 10:57 ` Peter Maydell
  2021-05-09 15:09 ` Thomas Huth
  2021-07-09  4:17 ` Launchpad Bug Tracker
  8 siblings, 0 replies; 10+ messages in thread
From: Peter Maydell @ 2020-11-05 10:57 UTC (permalink / raw)
  To: qemu-devel

** Changed in: qemu
       Status: New => Confirmed

** Tags added: arm

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1861161

Title:
  qemu-arm-static stuck with 100% CPU when cross-compiling emacs

Status in QEMU:
  Confirmed

Bug description:
  Hello,

  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.

  Here is the machine I'm building on (hetzner cloud machine):

  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:

  $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .

  It builds fine until this:

  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el

  This is supposed to take a few seconds, but here it takes 100% CPU and
  never ends. When I strace the process I see a never ending loop like
  this:

  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)

  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)

  Any ideas of what I could do to debug it further?

  Kind regards,
  Philippe

  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo"
  sometimes.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1861161/+subscriptions


^ permalink raw reply	[flat|nested] 10+ messages in thread
* [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs
  2020-01-28 15:37 [Bug 1861161] [NEW] qemu-arm-static 100% CPU when cross-compiling emacs on alpine Philippe Vaucher
                   ` (6 preceding siblings ...)
  2020-11-05 10:57 ` Peter Maydell
@ 2021-05-09 15:09 ` Thomas Huth
  2021-07-09  4:17 ` Launchpad Bug Tracker
  8 siblings, 0 replies; 10+ messages in thread
From: Thomas Huth @ 2021-05-09 15:09 UTC (permalink / raw)
  To: qemu-devel

The QEMU project is currently moving its bug tracking to another system.
For this we need to know which bugs are still valid and which could be
closed already. Thus we are setting the bug state to "Incomplete" now.

If the bug has already been fixed in the latest upstream version of QEMU,
then please close this ticket as "Fix released".

If it is not fixed yet and you think that this bug report here is still
valid, then you have two options:

1) If you already have an account on gitlab.com, please open a new ticket
for this problem in our new tracker here:

    https://gitlab.com/qemu-project/qemu/-/issues

and then close this ticket here on Launchpad (or let it expire auto-
matically after 60 days). Please mention the URL of this bug ticket on
Launchpad in the new ticket on GitLab.

2) If you don't have an account on gitlab.com and don't intend to get
one, but still would like to keep this ticket opened, then please switch
the state back to "New" or "Confirmed" within the next 60 days (other-
wise it will get closed as "Expired"). We will then eventually migrate
the ticket automatically to the new system (but you won't be the reporter
of the bug in the new system and thus you won't get notified on changes
anymore).

Thank you and sorry for the inconvenience.


** Changed in: qemu
       Status: Confirmed => Incomplete

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1861161

Title:
  qemu-arm-static stuck with 100% CPU when cross-compiling emacs

Status in QEMU:
  Incomplete

Bug description:
  Hello,

  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.

  Here is the machine I'm building on (hetzner cloud machine):

  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:

  $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .

  It builds fine until this:

  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el

  This is supposed to take a few seconds, but here it takes 100% CPU and
  never ends. When I strace the process I see a never ending loop like
  this:

  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)

  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)

  Any ideas of what I could do to debug it further?

  Kind regards,
  Philippe

  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo"
  sometimes.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1861161/+subscriptions


^ permalink raw reply	[flat|nested] 10+ messages in thread
* [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs
  2020-01-28 15:37 [Bug 1861161] [NEW] qemu-arm-static 100% CPU when cross-compiling emacs on alpine Philippe Vaucher
                   ` (7 preceding siblings ...)
  2021-05-09 15:09 ` Thomas Huth
@ 2021-07-09  4:17 ` Launchpad Bug Tracker
  8 siblings, 0 replies; 10+ messages in thread
From: Launchpad Bug Tracker @ 2021-07-09  4:17 UTC (permalink / raw)
  To: qemu-devel

[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1861161

Title:
  qemu-arm-static stuck with 100% CPU when cross-compiling emacs

Status in QEMU:
  Expired

Bug description:
  Hello,

  I'm trying to build multi-arch docker images for
  https://hub.docker.com/r/silex/emacs.

  Here is the machine I'm building on (hetzner cloud machine):

  root@ubuntu-4gb-fsn1-1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04
  Codename:       bionic
  root@ubuntu-4gb-fsn1-1:~# uname -a
  Linux ubuntu-4gb-fsn1-1 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

  Whenever I try to build the following alpine Dockerfile
  https://gitlab.com/Silex777/docker-
  emacs/blob/master/26.3/alpine/3.9/dev/Dockerfile like this:

  $ sysctl kernel.randomize_va_space=0
  $ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  $ docker build --pull -t test --platform arm .

  It builds fine until this:

  root@ubuntu-4gb-fsn1-1:~# ps -ef | grep qemu
  root     26473 26465 99 14:26 pts/0    01:59:58 /usr/bin/qemu-arm-static ../src/bootstrap-emacs -batch --no-site-file --no-site-lisp --eval (setq load-prefer-newer t) -f batch-byte-compile emacs-lisp/macroexp.el

  This is supposed to take a few seconds, but here it takes 100% CPU and
  never ends. When I strace the process I see a never ending loop like
  this:

  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)
  getdents64(5, /* 0 entries */, 2048)    = 0
  lseek(5, 0, SEEK_SET)                   = 0
  getdents64(5, /* 5 entries */, 2048)    = 120
  tgkill(5875, 5878, SIGRT_2)             = -1 EAGAIN (Resource temporarily unavailable)

  It happens with all the QEMU versions I tested:
  - 2.11.1 (OS version)
  - 4.1.1-1 (from multiarch/qemu-user-static:4.1.1-1)
  - 4.2.0-2 (from multiarch/qemu-user-static)

  Any ideas of what I could do to debug it further?

  Kind regards,
  Philippe

  p.s: Everything builds fine when the base image is ubuntu. I also had
  similar hangs with basic commands like "apt-get install foo"
  sometimes.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1861161/+subscriptions


^ permalink raw reply	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2021-07-09  4:46 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-01-28 15:37 [Bug 1861161] [NEW] qemu-arm-static 100% CPU when cross-compiling emacs on alpine Philippe Vaucher
2020-01-28 15:57 ` [Bug 1861161] Re: qemu-arm-static stuck with 100% CPU when cross-compiling emacs Philippe Vaucher
2020-01-28 16:50 ` Peter Maydell
2020-01-28 18:01 ` Philippe Vaucher
2020-01-29 18:07 ` Philippe Vaucher
2020-01-29 19:33 ` Philippe Vaucher
2020-03-22  8:50 ` Philippe Vaucher
2020-11-05 10:57 ` Peter Maydell
2021-05-09 15:09 ` Thomas Huth
2021-07-09  4:17 ` Launchpad Bug Tracker

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