Messages in this thread |  | | Date | Wed, 10 Oct 2001 16:48:23 -0400 | From | Benjamin LaHaise <> | Subject | Re: [CFT][PATCH] smoother VM for -ac |
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On Wed, Oct 10, 2001 at 05:25:30PM -0300, Rik van Riel wrote: > 4) in page_alloc.c, the "slowdown" reschedule has been > made stronger by turning it into a try_to_free_pages(), > under memory load, this results in allocators calling > try_to_free_pages() when the amount of work to be done > isn't too bad yet and pretty much guarantees them they'll > get to do their allocation immediately afterwards ... > statistics make sure that the memory hogs are slowed down > much more than well-behaved programs
There's a small problem with this one: I know that during testing of earlier 2.4 kernels we saw a livelock which was caused by the vm subsystem spinning without scheduling. This can happen in a couple of cases like NFS where another task has to be allowed to run in order to make progress in clearing pages.
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