Messages in this thread |  | | Date | Tue, 18 Sep 2001 16:29:59 -0300 (BRT) | From | Marcelo Tosatti <> | Subject | Re: 2.4.10pre11 vm rewrite fixes for mainline inclusion and testing |
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On Tue, 18 Sep 2001, Andrea Arcangeli wrote:
(testing now)
> Linus, can you merge this patch in the next pre-patch? Marcelo and > Andrew, can you test if this fixes your problems properly or if we need > further work on it for the oom problem? > > Only in 2.4.10pre11aa1: 00_vm-aa-2 > > description of the patch: > > - fixed a race condition in rw_swap_page path: if we need > to wait synchronously on the page we must hold a reference > on the page or it could be freed by the VM under us > after it's been unlocked at I/O completion time (see > the page_io.c changes) > - don't hide anything (see the new parameter "this_max_scan" to > shrink_cache) > - don't skip work on the ptes but just don't stop until we > unmapped the "interesting" pages from the right classzone
I really think we should reintroduce the idea of "enough" inactive/free pages, Andrea.
This way we avoid starving the page reclaiming work on only one zone when we have a small zone under extreme pressure, while at the same time we avoid breaking writeout clustering and the "fairness" of pte scanning.
Do you remember the "zone_inactive_plenty()/zone_free_plenty()" stuff which we had back into pre10 ?
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