Andi Kleen <[email protected]> wrote:
>
> On Sun, Feb 26, 2006 at 10:21:52AM -0800, Andrew Morton wrote:
> > Chuck Ebbert <[email protected]> wrote:
> > >
> > > Chris Largret is getting repeated OOM kills because of DMA memory
> > > exhaustion:
> > >
> > > oom-killer: gfp_mask=0xd1, order=3
> > >
> >
> > This could be related to the known GFP_DMA oom on some x86_64 machines.
>
> What known GFP_DMA oom? GFP_DMA allocation should work.
>
There's a problem on some x86_64 machines which confuses the BIO layer.
BIO makes simple decisions about bounce pfns and some x86_64 memory layouts
cause them to go wrong. Net effect: lots of GFP_DMA allocations in the BIO
layer.
http://readlist.com/lists/vger.kernel.org/linux-kernel/36/182357.html
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=175173
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