Messages in this thread Patch in this message | | | Date | Sat, 10 Feb 2001 07:46:14 -0200 (BRST) | From | Marcelo Tosatti <> | Subject | Re: Linux 2.4.1-ac7 |
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On Sat, 10 Feb 2001, Mike Galbraith wrote:
> Hi Rik, > > This change makes my box swap madly under load. It appears to be > keeping more cache around than is really needed, and therefore > having to resort to swap instead. The result is MUCH more I/O than > previous kernels while doing the same exact job. > > My test load is make -jN bzImage. Previous kernels kept cache at > an average of ~20ish mb at a job level N at which level I had nearly > zero measurable throughput loss compared to single task compile. > > >>From that, I surmise that the cachable component of this job must > fit in that roughly 20ish mb of space. (for otherwise, I would be > suffering throughput loss). With this vm change, cache is nearly > three times as large as usual. Where 30 tasks will run with only > modest throughput loss in ac5, ac8 throughput tapers off rapidly > at half of that.
Swapped out pages were not being counted in the flushing limitation.
Could you try the following patch?
Thanks
--- linux.orig/mm/vmscan.c Sat Feb 10 08:26:17 2001 +++ linux/mm/vmscan.c Sat Feb 10 09:34:20 2001 @@ -515,6 +515,7 @@
writepage(page); flushed_pages++; + max_launder--; page_cache_release(page);
/* And re-start the thing.. */
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