Re: [PATCH] vmalloc: add warning in __vmalloc

[Nick Piggin]

On 3 May 2012 17:13, Artem Bityutskiy <dedekind1@xxxxxxxxx> wrote:
> On Thu, 2012-05-03 at 16:30 +1000, Nick Piggin wrote:
>> Note that in writeback paths, a "good citizen" filesystem should not require
>> any allocations, or at least it should be able to tolerate allocation failures.
>> So fixing that would be a good idea anyway.
>
> This is a good point, but UBIFS kmallocs(GFP_NOFS) when doing I/O
> because it needs to compress/decompress. But I agree that if kmalloc
> fails, we should have a fall-back reserve buffer protected by a mutex
> for memory pressure situations.

AKA, a mempool :)
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