Messages in this thread | | | From | KOSAKI Motohiro <> | Subject | Re: [PATCH] vmscan: bail out of page reclaim after swap_cluster_max pages | Date | Sun, 30 Nov 2008 15:30:51 +0900 (JST) |
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> Reclaiming is very easy when the workload is just page cache, > because the application will be throttled when too many page > cache pages are dirty. > > When using mmap or memory hogs writing to swap, applications > will not be throttled by the "too many dirty pages" logic, > but may instead end up being throttled in the direct reclaim > path instead. > > At that point direct reclaim may become a lot more common, > making the imbalance more significant.
fair enough.
> I'll run a few tests.
Great. I'm looking for your mail :)
> > Andrew, I hope add this mesurement result to rvr bailing out patch description too. > > So far the performance numbers you have measured are very > encouraging and do indeed suggest that the priority==DEF_PRIORITY > thing does not make a difference.
thank you.
I believe reclaim latency reducing doesn't only improve hpc, but also improve several multimedia and desktop application.
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