Messages in this thread | | | Date | Fri, 11 Jun 2010 12:25:23 -0400 | From | Christoph Hellwig <> | Subject | Re: [PATCH 6/6] vmscan: Do not writeback pages in direct reclaim |
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On Thu, Jun 10, 2010 at 11:17:06PM -0700, Andrew Morton wrote: > As it stands, it would be wildly incautious to make a change like > this without first working out why we're pulling so many dirty pages > off the LRU tail, and fixing that.
Note that unlike the writepage vs writepages from kswapd which can be fixed by the right tuning this is a black or white issue. Writeback from direct reclaim will kill your stack if the caller happens to be the wrong one, and just making it happen less often is not a fix - it must not happen at all.
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