Messages in this thread | | | Date | Thu, 19 Jan 2006 14:15:15 -0800 | From | Andrew Morton <> | Subject | Re: Out of Memory: Killed process 16498 (java). |
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Dave Jones <davej@redhat.com> 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 thing.
Jens, would you have time to investigate please? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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