Re: Memory management woes - order 1 allocation failures

From: Frans Pop
Date: Fri Feb 26 2010 - 10:33:23 EST


On Friday 26 February 2010, Pekka Enberg wrote:
> > Isn't it a bit strange that cache claims so much memory that real
> > processes get into allocation failures?
>
> All of the failed allocations seem to be GFP_ATOMIC so it's not _that_
> strange.

It's still very ugly though. And I would say it should be unnecessary.

> Dunno if anything changed recently. What's the last known good kernel for
> you?

I've not used that box very intensively in the past, but I first saw the
allocation failure with aptitude with either .31 or .32. I would be
extremely surprised if I could reproduce the problem with .30.
And I have done large rsyncs to the box without any problems in the past,
but that must have been with .24 or so kernels.

It seems likely to me that it's related to all the other swap and
allocation issues we've been seeing after .30.

Thanks,
FJP
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