[lkml]   [2011]   [May]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: Kernel falls apart under light memory pressure (i.e. linking vmlinux)
    [cc linux-mm]

    On Thu, May 12, 2011 at 7:54 AM, Andrew Lutomirski <> wrote:
    > On Thu, May 12, 2011 at 1:46 AM, Andi Kleen <> wrote:
    >>> Here's a nice picture of alt-sysrq-m with lots of memory free but the
    >>> system mostly hung.  I can still switch VTs.
    >> Would rather need backtraces. Try setting up netconsole or crashdump
    >> first.
    > Here are some logs for two different failure mores.
    > incorrect_oom_kill.txt is an OOM kill when there was lots of available
    > swap to use.  AFAICT the kernel should not have OOM killed at all.
    > stuck_xyz is when the system is wedged with plenty (~300MB) free
    > memory but no swap.  The sysrq files are self-explanatory.
    > stuck-sysrq-f.txt is after the others so that it won't have corrupted
    > the output.  After taking all that data, I waited awhile and started
    > getting soft lockup messges.
    > I'm having trouble reproducing the "stuck" failure mode on my
    > lockdep-enabled kernel right now (the OOM kill is easy), so no lock
    > state trace.  But I got one yesterday and IIRC it showed a few tty
    > locks and either kworker or kcryptd holding (kqueue) and
    > ((&io->work)).
    > I compressed the larger files.
    > --Andy
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2011-05-14 17:49    [W:0.029 / U:12.892 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site