Messages in this thread | | | Subject | Re: [RFC 7/7] Switch of PF_MEMALLOC during writeout | From | Andi Kleen <> | Date | 21 Aug 2007 01:08:06 +0200 |
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Christoph Lameter <clameter@sgi.com> writes:
> Switch off PF_MEMALLOC during both direct and kswapd reclaim. > > This works because we are not holding any locks at that point because > reclaim is essentially complete. The write occurs when the memory on > the zones is at the high water mark so it is unlikely that writeout > will get into trouble. If so then reclaim can be called recursively to > reclaim more pages.
What would stop multiple recursions in extreme low memory cases? Seems risky to me and risking stack overflow. Perhaps define another flag to catch that?
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