Bug#618485: linux-image-2.6.32-5-vserver-686: VM value in /proc/virtual/xxx/limit decreases abnormally
Package: linux-2.6
Version: 2.6.32-30
Severity: important
When a process starts and ends inside a virtual server, virtual memory reported
by /proc/virtual/xxx/limit (as VM) decreases (at least by 1). The value drifts
slowly and reaches negative values.
As long as no hard/soft limit is set, this bug seems to have no incidence.
Otherwise, the virtual server become unusable when virtual memory reaches
negative values (memory allocation failures, new process get killed)
Someone reports the same issue on linux-vserver mailling list :
http://list.linux-vserver.org/archive?mss:4894:olhpkllgpffjhcfianop
After some tests and kernel rebuilds, it turns out that :
- previous version (2.6.32-29) is not affected
- drift does not occur when I exclude the patch debian/exec-Get-rid-of-
linux_binprm-vma_pages.patch
This patch is related to :
bugfix/all/exec-make-argv-envp-memory-visible-to-oom-killer.patch
bugfix/all/exec-copy-and-paste-the-fixes-into-compat_do_execve-paths.patch
-- Package-specific info:
** Version:
Linux version 2.6.32-5-vserver-686 (Debian 2.6.32-30) (ben@decadent.org.uk)
(gcc version 4.3.5 (Debian 4.3.5-4) ) #1 SMP Wed Jan 12 06:32:10 UTC 2011
** Command line:
BOOT_IMAGE=/boot/vmlinuz-2.6.32-5-vserver-686 root=UUID=bfc8ab24-de75-41cf-
8c2b-78686042fd9a ro quiet
-- System Information:
Debian Release: wheezy/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
-- vserver packages versions:
ii linux-image-2.6-vserver-686 2.6.32+29
Linux 2.6 for modern PCs (meta-package), Linux-VServer support
ii linux-image-2.6.32-5-vserver-686 2.6.32-30
Linux 2.6.32 for modern PCs, Linux-VServer support
ii linux-image-2.6.32-5-vserver-686-bigmem 2.6.32-30
Linux 2.6.32 for PCs with 4GB+ RAM, Linux-VServer support
ii linux-image-vserver-686 2.6.32+29
Linux for modern PCs (meta-package), Linux-VServer support
ii linux-image-vserver-686-bigmem 2.6.32+29
Linux for PCs with 4GB+ RAM (meta-package), Linux-VServer support
ii util-vserver 0.30.216-pre2864-2+b1
user-space tools for Linux-VServer virtual private servers
ii vserver-debiantools 0.8.0
Tools to manage debian virtual servers
Reply to: