* [Qemu-devel] [Bug 597402] [NEW] qemu does not call unlink() on temp files in snapshot mode
@ 2010-06-22 19:30 Michael Roth
2010-10-01 18:14 ` [Qemu-devel] [Bug 597402] " blueswirl
2011-02-20 17:13 ` Aurelien Jarno
0 siblings, 2 replies; 3+ messages in thread
From: Michael Roth @ 2010-06-22 19:30 UTC (permalink / raw)
To: qemu-devel
Public bug reported:
== overview ==
When booting guests in snapshot mode qemu never calls unlink()
on the files storing changes to the images. This results in large amounts of
disk space being used over time.
This bug seems to have been introduced by qemu git commit
b6ce07aa83bdee3cfd2610f270a0ce304e78df95
== steps to reproduce ==
1) Boot a guest like so:
qemu -m 512 -drive
file=/scratch/images/mdroth/rhel54_64_base.raw,snapshot=on
== actual results ==
/tmp/vl.* files are created and never unlinked/deleted. for example:
mdroth@illuin:~/dev/kvm/qemu-build$ x86_64-softmmu/qemu-system-x86_64 -m 512 -drive file=/media/secondary/vm/fc12_64_base.raw,snapshot=on &
[1] 24080
mdroth@illuin:~/dev/kvm/qemu-build$ ls -l /tmp/vl*
-rw------- 1 mdroth mdroth 262144 2010-06-22 14:21 /tmp/vl.tFSAmR
mdroth@illuin:~/dev/kvm/qemu-build$ fuser /tmp/vl*
/tmp/vl.tFSAmR: 24080
== expected results ==
temporary files should immediately be unlink()'ed and not be present in the file
listing.
== system details ==
mdroth@illuin:~/dev/kvm/qemu-build$ uname -a
Linux illuin 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009 x86_64 GNU/Linux
latest commit (cada87c432e3b9cd55869a24055baf2b7bc0b70c) from qemu.git
master branch:
mdroth@illuin:~/dev/kvm/qemu-build$ x86_64-softmmu/qemu-system-x86_64 --version
QEMU emulator version 0.12.50, Copyright (c) 2003-2008 Fabrice Bellard
** Affects: qemu
Importance: Undecided
Status: New
--
qemu does not call unlink() on temp files in snapshot mode
https://bugs.launchpad.net/bugs/597402
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
Status in QEMU: New
Bug description:
== overview ==
When booting guests in snapshot mode qemu never calls unlink()
on the files storing changes to the images. This results in large amounts of
disk space being used over time.
This bug seems to have been introduced by qemu git commit b6ce07aa83bdee3cfd2610f270a0ce304e78df95
== steps to reproduce ==
1) Boot a guest like so:
qemu -m 512 -drive
file=/scratch/images/mdroth/rhel54_64_base.raw,snapshot=on
== actual results ==
/tmp/vl.* files are created and never unlinked/deleted. for example:
mdroth@illuin:~/dev/kvm/qemu-build$ x86_64-softmmu/qemu-system-x86_64 -m 512 -drive file=/media/secondary/vm/fc12_64_base.raw,snapshot=on &
[1] 24080
mdroth@illuin:~/dev/kvm/qemu-build$ ls -l /tmp/vl*
-rw------- 1 mdroth mdroth 262144 2010-06-22 14:21 /tmp/vl.tFSAmR
mdroth@illuin:~/dev/kvm/qemu-build$ fuser /tmp/vl*
/tmp/vl.tFSAmR: 24080
== expected results ==
temporary files should immediately be unlink()'ed and not be present in the file
listing.
== system details ==
mdroth@illuin:~/dev/kvm/qemu-build$ uname -a
Linux illuin 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009 x86_64 GNU/Linux
latest commit (cada87c432e3b9cd55869a24055baf2b7bc0b70c) from qemu.git master branch:
mdroth@illuin:~/dev/kvm/qemu-build$ x86_64-softmmu/qemu-system-x86_64 --version
QEMU emulator version 0.12.50, Copyright (c) 2003-2008 Fabrice Bellard
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Qemu-devel] [Bug 597402] Re: qemu does not call unlink() on temp files in snapshot mode
2010-06-22 19:30 [Qemu-devel] [Bug 597402] [NEW] qemu does not call unlink() on temp files in snapshot mode Michael Roth
@ 2010-10-01 18:14 ` blueswirl
2011-02-20 17:13 ` Aurelien Jarno
1 sibling, 0 replies; 3+ messages in thread
From: blueswirl @ 2010-10-01 18:14 UTC (permalink / raw)
To: qemu-devel
Does not seem to happen anymore:
strace -etrace=unlink -esignal= -f ./qemu -drive file=/dev/null,snapshot=on
unlink("/tmp/vl.jUbLWz") = 0
** Changed in: qemu
Status: New => Fix Committed
--
qemu does not call unlink() on temp files in snapshot mode
https://bugs.launchpad.net/bugs/597402
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
Status in QEMU: Fix Committed
Bug description:
== overview ==
When booting guests in snapshot mode qemu never calls unlink()
on the files storing changes to the images. This results in large amounts of
disk space being used over time.
This bug seems to have been introduced by qemu git commit b6ce07aa83bdee3cfd2610f270a0ce304e78df95
== steps to reproduce ==
1) Boot a guest like so:
qemu -m 512 -drive
file=/scratch/images/mdroth/rhel54_64_base.raw,snapshot=on
== actual results ==
/tmp/vl.* files are created and never unlinked/deleted. for example:
mdroth@illuin:~/dev/kvm/qemu-build$ x86_64-softmmu/qemu-system-x86_64 -m 512 -drive file=/media/secondary/vm/fc12_64_base.raw,snapshot=on &
[1] 24080
mdroth@illuin:~/dev/kvm/qemu-build$ ls -l /tmp/vl*
-rw------- 1 mdroth mdroth 262144 2010-06-22 14:21 /tmp/vl.tFSAmR
mdroth@illuin:~/dev/kvm/qemu-build$ fuser /tmp/vl*
/tmp/vl.tFSAmR: 24080
== expected results ==
temporary files should immediately be unlink()'ed and not be present in the file
listing.
== system details ==
mdroth@illuin:~/dev/kvm/qemu-build$ uname -a
Linux illuin 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009 x86_64 GNU/Linux
latest commit (cada87c432e3b9cd55869a24055baf2b7bc0b70c) from qemu.git master branch:
mdroth@illuin:~/dev/kvm/qemu-build$ x86_64-softmmu/qemu-system-x86_64 --version
QEMU emulator version 0.12.50, Copyright (c) 2003-2008 Fabrice Bellard
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Qemu-devel] [Bug 597402] Re: qemu does not call unlink() on temp files in snapshot mode
2010-06-22 19:30 [Qemu-devel] [Bug 597402] [NEW] qemu does not call unlink() on temp files in snapshot mode Michael Roth
2010-10-01 18:14 ` [Qemu-devel] [Bug 597402] " blueswirl
@ 2011-02-20 17:13 ` Aurelien Jarno
1 sibling, 0 replies; 3+ messages in thread
From: Aurelien Jarno @ 2011-02-20 17:13 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu
Status: Fix Committed => Fix Released
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/597402
Title:
qemu does not call unlink() on temp files in snapshot mode
Status in QEMU:
Fix Released
Bug description:
== overview ==
When booting guests in snapshot mode qemu never calls unlink()
on the files storing changes to the images. This results in large amounts of
disk space being used over time.
This bug seems to have been introduced by qemu git commit
b6ce07aa83bdee3cfd2610f270a0ce304e78df95
== steps to reproduce ==
1) Boot a guest like so:
qemu -m 512 -drive
file=/scratch/images/mdroth/rhel54_64_base.raw,snapshot=on
== actual results ==
/tmp/vl.* files are created and never unlinked/deleted. for example:
mdroth@illuin:~/dev/kvm/qemu-build$ x86_64-softmmu/qemu-system-x86_64 -m 512 -drive file=/media/secondary/vm/fc12_64_base.raw,snapshot=on &
[1] 24080
mdroth@illuin:~/dev/kvm/qemu-build$ ls -l /tmp/vl*
-rw------- 1 mdroth mdroth 262144 2010-06-22 14:21 /tmp/vl.tFSAmR
mdroth@illuin:~/dev/kvm/qemu-build$ fuser /tmp/vl*
/tmp/vl.tFSAmR: 24080
== expected results ==
temporary files should immediately be unlink()'ed and not be present in the file
listing.
== system details ==
mdroth@illuin:~/dev/kvm/qemu-build$ uname -a
Linux illuin 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009 x86_64 GNU/Linux
latest commit (cada87c432e3b9cd55869a24055baf2b7bc0b70c) from qemu.git
master branch:
mdroth@illuin:~/dev/kvm/qemu-build$ x86_64-softmmu/qemu-system-x86_64 --version
QEMU emulator version 0.12.50, Copyright (c) 2003-2008 Fabrice Bellard
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2011-02-20 17:21 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2010-06-22 19:30 [Qemu-devel] [Bug 597402] [NEW] qemu does not call unlink() on temp files in snapshot mode Michael Roth
2010-10-01 18:14 ` [Qemu-devel] [Bug 597402] " blueswirl
2011-02-20 17:13 ` Aurelien Jarno
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