Re: [PATCH 0/5] make slab gfp fair

Christoph Lameter
2007-05-17T18:01:16Z

On Thu, 17 May 2007, Peter Zijlstra wrote:

> > > Its about ensuring ALLOC_NO_WATERMARKS memory only reaches PF_MEMALLOC
> > > processes, not joe random's pi calculator.
> >
> > Watermarks are per zone?
>
> Yes, but the page allocator might address multiple zones in order to
> obtain a page.

And then again it may not because the allocation is contrained to a
particular node,a NORMAL zone or a DMA zone. One zone way be below the
watermark and another may not. Different allocations may be allowed to
tap into various zones for various reasons.