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    SubjectRe: Out of Memory: Killed process 16498 (java).
    Dave Jones <> wrote:
    > On Thu, Jan 19, 2006 at 03:11:45PM -0000, Andy Chittenden wrote:
    > > DMA free:20kB min:24kB low:28kB high:36kB active:0kB inactive:0kB
    > > present:12740kB pages_scanned:4 all_unreclaimable? yes
    > Note we only scanned 4 pages before we gave up.
    > Larry Woodman came up with this patch below that clears all_unreclaimable
    > when in two places where we've made progress at freeing up some pages
    > which has helped oom situations for some of our users.

    That won't help - there are exactly zero pages on ZONE_DMA's LRU.

    The problem appears to be that all of the DMA zone has been gobbled up by
    the BIO layer. It seems quite inappropriate that a modern 64-bit machine
    is allocating tons of disk I/O pages from the teeny ZONE_DMA. I'm
    suspecting that someone has gone and set a queue's ->bounce_gfp to the wrong

    Jens, would you have time to investigate please?
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      Last update: 2006-01-19 23:17    [W:0.042 / U:96.264 seconds]
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