** Changed in: qemu
Status: Fix Committed => Fix Released
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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
