Messages in this thread | | | Date | Fri, 26 Nov 2010 11:06:19 -0500 | From | Kyle McMartin <> | Subject | Re: [PATCH 1/2] mm: page allocator: Adjust the per-cpu counter threshold when memory is low |
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On Wed, Oct 27, 2010 at 09:47:35AM +0100, Mel Gorman wrote: ><snip> > To ensure that kswapd wakes up, a safe version of zone_watermark_ok() > is introduced that takes a more accurate reading of NR_FREE_PAGES when > called from wakeup_kswapd, when deciding whether it is really safe to go > back to sleep in sleeping_prematurely() and when deciding if a zone is > really balanced or not in balance_pgdat(). We are still using an expensive > function but limiting how often it is called. ><snip> > Reported-by: Shaohua Li <shaohua.li@intel.com> > Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Hi Mel,
I notice these aren't flagged for stable, should they be? (They fairly trivially apply and compile on 2.6.36 barring the trace_ points which changed.) I've got a few bug reports against .36/.37 where kswapd has been sleeping for 60s+.
I built them some kernels with these patches, but haven't heard back yet as to whether it fixes things for them.
Thanks for any insight, Kyle
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