Messages in this thread | | | Subject | Re: [patch] vm early reclaim orphaned pages | From | Nick Piggin <> | Date | Fri, 17 Jun 2005 13:42:29 +1000 |
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On Thu, 2005-06-16 at 20:34 -0700, Andrew Morton wrote: > Nick Piggin <nickpiggin@yahoo.com.au> wrote: > > > > We have workloads where orphaned pages build up and appear to slow > > the system down when it starts reclaiming memory. > > > > Stripping the referenced bit from orphaned pages and putting them > > on the end of the inactive list should help improve reclaim. > > Presumably if do_invalidatepage() failed, there's some reason why this page > is not reclaimable (eg, JBD is still dinking with it). Hence there's a > very good chance that kswapd won't be able to reclaim it either. >
Yeah that is a problem I was worried about. Perhaps just stripping PageReferenced and putting it on the *front* of the inactive list would be better?
> Adding some instrumentation would be useful: set some new page flag on > these pages and then accumulate the success/failure stats in vmscan.c, see > what they say. >
OK.
[snip patch]
> A standalone function in swap.c would be nicer.
Will do. Thanks.
-- SUSE Labs, Novell Inc.
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