[Bug 694029] Re: [natty] kvm guests become unstable after a while

[Sebastian Kuzminsky]

I'm affected by this bug too.

I recently upgraded my laptop from a Dell Latitude D380 running Lucid
64-bit to a Dell Latitude E6520 running Natty 64.  I moved all my VMs
from the old machine to the new.  All the VMs had been working fine for
a long time on the old system.

The first VM i booted is a 64-bit Lucid machine.  When I try compiling
the linux kernel on it (2.6.38.something, from git), it fails every time
with an error like this:

  gcc -Wp,-MD,drivers/firewire/.sbp2.o.d  -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/4.4.3/include -I/home/seb/uvc/uvcvideo/arch/x86/include -Iinclude  -include include/generated/autoconf.h -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -fno-delete-null-pointer-checks -O2 -m64 -mtune=generic -mno-red-zone -mcmodel=kernel -funit-at-a-time -maccumulate-outgoing-args -fstack-protector -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_FXSAVEQ=1 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -Wframe-larger-than=1024 -fno-omit-frame-pointer -fno-optimize-sibling-calls -g -pg -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack  -DMODULE  -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(sbp2)"  -D"KBUILD_MODNAME=KBUILD_STR(firewire_sbp2)" -c -o drivers/firewire/.tmp_sbp2.o drivers/firewire/sbp2.c
In file included from include/linux/mm.h:250,
                 from include/linux/pagemap.h:7,
                 from include/linux/blkdev.h:12,
                 from drivers/firewire/sbp2.c:31:
include/linux/page-flags.h: In function ‘PageOwnerPriv1’:
include/linux/page-flags.h:225: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.4/README.Bugs> for instructions.
make[2]: *** [drivers/firewire/sbp2.o] Error 1
make[1]: *** [drivers/firewire] Error 2
make: *** [drivers] Error 2

If I run make again, it compiles that file fine and segfaults on some
other file.

The host machine is totally stable, no problems at all.  The host
machine has plenty of disk free on / and /home (where the VMs live).  /
and /home are both ext4, though I think that's irrelevant.

Please let me know if you want me to run any experiments...

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https://bugs.launchpad.net/bugs/694029

Title:
  [natty] kvm guests become unstable after a while