From: Robert Stupp <snazy@gmx.de>
To: Michal Hocko <mhocko@kernel.org>, snazy@snazy.de
Cc: Randy Dunlap <rdunlap@infradead.org>,
linux-kernel@vger.kernel.org, Linux MM <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
"Potyra, Stefan" <Stefan.Potyra@elektrobit.com>
Subject: Re: mlockall(MCL_CURRENT) blocking infinitely
Date: Fri, 25 Oct 2019 15:10:39 +0200 [thread overview]
Message-ID: <c8950b81000e08bfca9fd9128cf87d8a329a904b.camel@gmx.de> (raw)
In-Reply-To: <20191025121104.GH17610@dhcp22.suse.cz>
On Fri, 2019-10-25 at 14:11 +0200, Michal Hocko wrote:
> On Fri 25-10-19 14:05:05, Michal Hocko wrote:
> [...]
> > This smells like something that could be runtime specific. Could
> > you
> > post strace output of your testcase?
>
> Ohh and /proc/<pid>/smaps while the strace is hung on mlockall
> please.
Sure, see below.
strace ./test
execve("./test", ["./test"], 0x7ffd6ba0f970 /* 89 vars */) = 0
brk(NULL) = 0x564ee2c79000
arch_prctl(0x3001 /* ARCH_??? */, 0x7ffd58f1d460) = -1 EINVAL (Invalid
argument)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=176037, ...}) = 0
mmap(NULL, 176037, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8be92bb000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC)
= 3
read(3,
"\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360r\2\0\0\0\0\0"...,
832) = 832
lseek(3, 64, SEEK_SET) = 64
read(3,
"\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"...,
784) = 784
lseek(3, 848, SEEK_SET) = 848
read(3,
"\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32)
= 32
lseek(3, 880, SEEK_SET) = 880
read(3,
"\4\0\0\0\24\0\0\0\3\0\0\0GNU\0!U\364U\255V\275\207\34\202%\274\312\205
\356%"..., 68) = 68
fstat(3, {st_mode=S_IFREG|0755, st_size=2025032, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x7f8be92b9000
lseek(3, 64, SEEK_SET) = 64
read(3,
"\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"...,
784) = 784
lseek(3, 848, SEEK_SET) = 848
read(3,
"\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32)
= 32
lseek(3, 880, SEEK_SET) = 880
read(3,
"\4\0\0\0\24\0\0\0\3\0\0\0GNU\0!U\364U\255V\275\207\34\202%\274\312\205
\356%"..., 68) = 68
mmap(NULL, 2032984, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f8be90c8000
mmap(0x7f8be90ed000, 1540096, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x25000) = 0x7f8be90ed000
mmap(0x7f8be9265000, 303104, PROT_READ,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19d000) = 0x7f8be9265000
mmap(0x7f8be92af000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e6000) = 0x7f8be92af000
mmap(0x7f8be92b5000, 13656, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f8be92b5000
close(3) = 0
arch_prctl(ARCH_SET_FS, 0x7f8be92ba540) = 0
mprotect(0x7f8be92af000, 12288, PROT_READ) = 0
mprotect(0x564ee18c8000, 4096, PROT_READ) = 0
mprotect(0x7f8be9312000, 4096, PROT_READ) = 0
munmap(0x7f8be92bb000, 176037) = 0
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(0x88, 0xa), ...}) = 0
brk(NULL) = 0x564ee2c79000
brk(0x564ee2c9a000) = 0x564ee2c9a000
write(1, "Before mlockall(MCL_CURRENT)\n", 29Before
mlockall(MCL_CURRENT)
) = 29
mlockall(MCL_CURRENT
^ the strace stops there (no closing bracket)
Unlike non-strace runs, I've got to do a `kill -9 $(pidof test)`
cat /proc/$(pidof test)/smaps
564ee18c5000-564ee18c6000 r--p 00000000 103:02
49174659 /home/snazy/devel/misc/zzz/test
Size: 4 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 4 kB
Pss: 4 kB
Shared_Clean: 0 kB
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Referenced: 4 kB
Anonymous: 0 kB
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Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 4 kB
THPeligible: 0
VmFlags: rd mr mw me dw lo sd
564ee18c6000-564ee18c7000 r-xp 00001000 103:02
49174659 /home/snazy/devel/misc/zzz/test
Size: 4 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 4 kB
Pss: 4 kB
Shared_Clean: 0 kB
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Anonymous: 0 kB
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Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 4 kB
THPeligible: 0
VmFlags: rd ex mr mw me dw lo sd
564ee18c7000-564ee18c8000 r--p 00002000 103:02
49174659 /home/snazy/devel/misc/zzz/test
Size: 4 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 4 kB
Pss: 4 kB
Shared_Clean: 0 kB
Shared_Dirty: 0 kB
Private_Clean: 4 kB
Private_Dirty: 0 kB
Referenced: 4 kB
Anonymous: 0 kB
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ShmemPmdMapped: 0 kB
Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 4 kB
THPeligible: 0
VmFlags: rd mr mw me dw lo sd
564ee18c8000-564ee18c9000 r--p 00002000 103:02
49174659 /home/snazy/devel/misc/zzz/test
Size: 4 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 4 kB
Pss: 4 kB
Shared_Clean: 0 kB
Shared_Dirty: 0 kB
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Private_Dirty: 4 kB
Referenced: 4 kB
Anonymous: 4 kB
LazyFree: 0 kB
AnonHugePages: 0 kB
ShmemPmdMapped: 0 kB
Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 4 kB
THPeligible: 0
VmFlags: rd mr mw me dw lo ac sd
564ee18c9000-564ee18ca000 rw-p 00003000 103:02
49174659 /home/snazy/devel/misc/zzz/test
Size: 4 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 4 kB
Pss: 4 kB
Shared_Clean: 0 kB
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SwapPss: 0 kB
Locked: 4 kB
THPeligible: 0
VmFlags: rd wr mr mw me dw lo ac sd
564ee2c79000-564ee2c9a000 rw-p 00000000 00:00
0 [heap]
Size: 132 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 132 kB
Pss: 132 kB
Shared_Clean: 0 kB
Shared_Dirty: 0 kB
Private_Clean: 0 kB
Private_Dirty: 132 kB
Referenced: 132 kB
Anonymous: 132 kB
LazyFree: 0 kB
AnonHugePages: 0 kB
ShmemPmdMapped: 0 kB
Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 132 kB
THPeligible: 0
VmFlags: rd wr mr mw me lo ac sd
7f8be90c8000-7f8be90ed000 r--p 00000000 103:02
44307431 /lib/x86_64-linux-gnu/libc-2.30.so
Size: 148 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 144 kB
Pss: 0 kB
Shared_Clean: 144 kB
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THPeligible: 0
VmFlags: rd mr mw me lo sd
7f8be90ed000-7f8be9265000 r-xp 00025000 103:02
44307431 /lib/x86_64-linux-gnu/libc-2.30.so
Size: 1504 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 832 kB
Pss: 5 kB
Shared_Clean: 832 kB
Shared_Dirty: 0 kB
Private_Clean: 0 kB
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THPeligible: 0
VmFlags: rd ex mr mw me lo sd
7f8be9265000-7f8be92af000 r--p 0019d000 103:02
44307431 /lib/x86_64-linux-gnu/libc-2.30.so
Size: 296 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 64 kB
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THPeligible: 0
VmFlags: rd mr mw me lo sd
7f8be92af000-7f8be92b2000 r--p 001e6000 103:02
44307431 /lib/x86_64-linux-gnu/libc-2.30.so
Size: 12 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
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Pss: 12 kB
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7f8be92b2000-7f8be92b5000 rw-p 001e9000 103:02
44307431 /lib/x86_64-linux-gnu/libc-2.30.so
Size: 12 kB
KernelPageSize: 4 kB
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Pss: 12 kB
Shared_Clean: 0 kB
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THPeligible: 0
VmFlags: rd wr mr mw me lo ac sd
7f8be92b5000-7f8be92bb000 rw-p 00000000 00:00 0
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KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 24 kB
Pss: 24 kB
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Shared_Dirty: 0 kB
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SwapPss: 0 kB
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THPeligible: 0
VmFlags: rd wr mr mw me lo ac sd
7f8be92e6000-7f8be92e7000 r--p 00000000 103:02
44302414 /lib/x86_64-linux-gnu/ld-2.30.so
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MMUPageSize: 4 kB
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Pss: 0 kB
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VmFlags: rd mr mw me dw lo sd
7f8be92e7000-7f8be9309000 r-xp 00001000 103:02
44302414 /lib/x86_64-linux-gnu/ld-2.30.so
Size: 136 kB
KernelPageSize: 4 kB
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Rss: 136 kB
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VmFlags: rd ex mr mw me dw lo sd
7f8be9309000-7f8be9311000 r--p 00023000 103:02
44302414 /lib/x86_64-linux-gnu/ld-2.30.so
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KernelPageSize: 4 kB
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THPeligible: 0
VmFlags: rd mr mw me dw lo sd
7f8be9312000-7f8be9313000 r--p 0002b000 103:02
44302414 /lib/x86_64-linux-gnu/ld-2.30.so
Size: 4 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 4 kB
Pss: 4 kB
Shared_Clean: 0 kB
Shared_Dirty: 0 kB
Private_Clean: 0 kB
Private_Dirty: 4 kB
Referenced: 4 kB
Anonymous: 4 kB
LazyFree: 0 kB
AnonHugePages: 0 kB
ShmemPmdMapped: 0 kB
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THPeligible: 0
VmFlags: rd mr mw me dw lo ac sd
7f8be9313000-7f8be9314000 rw-p 0002c000 103:02
44302414 /lib/x86_64-linux-gnu/ld-2.30.so
Size: 4 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 4 kB
Pss: 4 kB
Shared_Clean: 0 kB
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Referenced: 4 kB
Anonymous: 4 kB
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Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 4 kB
THPeligible: 0
VmFlags: rd wr mr mw me dw lo ac sd
7f8be9314000-7f8be9315000 rw-p 00000000 00:00 0
Size: 4 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 4 kB
Pss: 4 kB
Shared_Clean: 0 kB
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Swap: 0 kB
SwapPss: 0 kB
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THPeligible: 0
VmFlags: rd wr mr mw me lo ac sd
7ffd58efe000-7ffd58f20000 rw-p 00000000 00:00
0 [stack]
Size: 136 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 20 kB
Pss: 20 kB
Shared_Clean: 0 kB
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Anonymous: 20 kB
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THPeligible: 0
VmFlags: rd wr mr mw me gd lo ac
7ffd58f74000-7ffd58f77000 r--p 00000000 00:00
0 [vvar]
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VmFlags: rd mr pf io de dd sd
7ffd58f77000-7ffd58f78000 r-xp 00000000 00:00
0 [vdso]
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VmFlags: rd ex mr mw me de sd
ffffffffff600000-ffffffffff601000 --xp 00000000 00:00
0 [vsyscall]
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VmFlags: ex
next prev parent reply other threads:[~2019-10-25 13:10 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4576b336-66e6-e2bb-cd6a-51300ed74ab8@snazy.de>
2019-10-24 23:34 ` mlockall(MCL_CURRENT) blocking infinitely Randy Dunlap
2019-10-25 9:21 ` Michal Hocko
2019-10-25 11:02 ` Robert Stupp
2019-10-25 11:46 ` Michal Hocko
2019-10-25 11:50 ` Michal Hocko
2019-10-25 11:59 ` Robert Stupp
2019-10-25 13:19 ` Robert Stupp
2019-10-25 11:55 ` Robert Stupp
2019-10-25 12:05 ` Michal Hocko
2019-10-25 12:11 ` Michal Hocko
2019-10-25 13:10 ` Robert Stupp [this message]
2019-10-25 13:27 ` Michal Hocko
2019-10-25 13:45 ` Robert Stupp
2019-10-25 13:57 ` Michal Hocko
2019-10-25 14:00 ` Michal Hocko
2019-10-25 15:58 ` Robert Stupp
2019-11-05 13:23 ` Robert Stupp
2019-11-05 15:28 ` Vlastimil Babka
2019-11-05 18:22 ` Johannes Weiner
2019-11-05 20:05 ` Robert Stupp
2019-11-06 10:25 ` Robert Stupp
2019-11-06 11:26 ` Robert Stupp
2019-11-06 12:04 ` Jan Kara
2019-11-06 12:24 ` Robert Stupp
2019-11-06 12:03 ` Jan Kara
2019-11-06 13:45 ` Robert Stupp
2019-11-06 14:35 ` Jan Kara
2019-11-06 15:32 ` Robert Stupp
2019-11-06 14:38 ` Jan Kara
2019-11-06 14:56 ` Josef Bacik
2019-11-06 15:05 ` Jan Kara
2019-11-06 15:14 ` Josef Bacik
2019-11-06 15:25 ` Jan Kara
2019-11-06 16:39 ` Robert Stupp
2019-11-06 17:03 ` Robert Stupp
2019-11-06 17:25 ` Jan Kara
2019-11-07 8:08 ` Robert Stupp
2019-11-20 12:42 ` Robert Stupp
2019-10-25 13:55 ` Robert Stupp
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