[lkml]   [2009]   [Apr]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 0/6] Handle bio_alloc failure
    On Tue, 14 Apr 2009 14:16:32 -0400
    Theodore Tso <> wrote:

    > In include/linux/page_alloc.h,
    > __GFP_NOFAIL is documented as "will never fail", but it says
    > absolutely nothing about __GFP_WAIT.

    In the present implementation, a __GFP_WAIT allocation for order <=3
    will only fail if the caller was oom-killed.

    Which raises the question "what happens when a mempool_alloc() caller
    gets oom-killed?".

    Seems that it will loop around in mempool_alloc() doing weak attempts
    to allocate memory, not doing direct reclaim while waiting for someone
    else to free something up. hm. I guess it'll recover eventually.

     \ /
      Last update: 2009-04-14 20:55    [W:0.020 / U:8.568 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site