Your message dated Wed, 01 Jun 2011 19:52:27 +0000
with message-id <[email protected]>
and subject line Bug#625571: fixed in qemu-kvm 0.12.5+dfsg-5+squeeze3
has caused the Debian Bug report #625571,
regarding qemu-kvm migration fails on 32bit userspace
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
625571: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=625571
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: qemu-kvm
Version: 0.12.0+dfsg-5
Severity: important
Tags: patch squeeze upstream pending
When perfoming migration on a 32bit userspace,
qemu-kvm aborts after glibc detects memory corruption.
This is 100% reproducible on a 32bit host userspace
(with 32 or 64bit kernel).
It has been this way since long time already.
The problem has been addressed upstream, twice,
and is described in the upstream commit:
http://git.kernel.org/?p=virt/kvm/qemu-kvm.git;a=commit;h=51b0c6065aa6e47a47094d73e24be298a4a7f3a1
The above commit describes the problem with the kernel
interface and fixes the second half of the problem,
namely, failure to migrate when using 32bit userspace
on a 64bit kernel.
But earlier versions of qemu-kvm failed migration on
32bits all the time, because initially (including
the version in squeeze), that code performed no buffer
size alignment at all, while kernel performed usual
rounding and hence overwrote userspace memory. The
problem didn't happen on 64bits because malloc there
performs some "better" alignment by its own.
This first, and more important, half of the issue
were fixed silently by upstream commit
8369e01ce418edb26a6e1f65406cac650563b3da , which
is titled "kvm: port qemu-kvm's bitmap scanning".
Especially this change in kvm-all.c:
- size = ((mem->memory_size >> TARGET_PAGE_BITS) + 7) / 8;
+ size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), HOST_LONG_BITS)
/ 8;
Severity is important since migration is important
even on 32bit platfoms, because it is used, in particular,
to save/restore running guest state (migrate to file).
/mjt
--- End Message ---
--- Begin Message ---
Source: qemu-kvm
Source-Version: 0.12.5+dfsg-5+squeeze3
We believe that the bug you reported is fixed in the latest version of
qemu-kvm, which is due to be installed in the Debian FTP archive:
kvm_0.12.5+dfsg-5+squeeze3_i386.deb
to main/q/qemu-kvm/kvm_0.12.5+dfsg-5+squeeze3_i386.deb
qemu-kvm-dbg_0.12.5+dfsg-5+squeeze3_i386.deb
to main/q/qemu-kvm/qemu-kvm-dbg_0.12.5+dfsg-5+squeeze3_i386.deb
qemu-kvm_0.12.5+dfsg-5+squeeze3.diff.gz
to main/q/qemu-kvm/qemu-kvm_0.12.5+dfsg-5+squeeze3.diff.gz
qemu-kvm_0.12.5+dfsg-5+squeeze3.dsc
to main/q/qemu-kvm/qemu-kvm_0.12.5+dfsg-5+squeeze3.dsc
qemu-kvm_0.12.5+dfsg-5+squeeze3_i386.deb
to main/q/qemu-kvm/qemu-kvm_0.12.5+dfsg-5+squeeze3_i386.deb
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Michael Tokarev <[email protected]> (supplier of updated qemu-kvm package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Format: 1.8
Date: Sat, 28 May 2011 13:39:58 +0400
Source: qemu-kvm
Binary: qemu-kvm qemu-kvm-dbg kvm
Architecture: source i386
Version: 0.12.5+dfsg-5+squeeze3
Distribution: stable
Urgency: low
Maintainer: Jan Lübbe <[email protected]>
Changed-By: Michael Tokarev <[email protected]>
Description:
kvm - dummy transitional package from kvm to qemu-kvm
qemu-kvm - Full virtualization on x86 hardware
qemu-kvm-dbg - Debugging info for qemu-kvm
Closes: 616159 619452 625206 625571
Changes:
qemu-kvm (0.12.5+dfsg-5+squeeze3) stable; urgency=low
.
* cirrus_vga:fix-division-by-0-for-color-expansion-rop-92d675d1c1.diff
(fix from upstream) - fixes division by zero with some guests
like WinNT 4.0 and WinME.
* fix-vnc-zlib-overflow.diff (backport from 0.14) (closes: #616159)
* qdev-dont-hw_error-in-qdev_init_nofail-bd6c9a61.diff -
don't abort but exit on user errors (closes: #619452)
* fix transitional kvm package description (closes: #625206)
* fix long-standing migration bug on 32bits (closes: #625571)
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qemu-kvm_0.12.5+dfsg-5+squeeze3_i386.deb
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Files:
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qemu-kvm_0.12.5+dfsg-5+squeeze3.dsc
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qemu-kvm_0.12.5+dfsg-5+squeeze3.diff.gz
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qemu-kvm_0.12.5+dfsg-5+squeeze3_i386.deb
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qemu-kvm-dbg_0.12.5+dfsg-5+squeeze3_i386.deb
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--- End Message ---
