Re: [PATCH] Reclaim orphaned swap pages

[Marcelo Tosatti <marcelo@conectiva.com.br>]

On Mon, 2 Apr 2001, Richard Jerrell wrote:

> > Actually if vm_enough_memory fails that prevents oom, apps get ENOMEM
> > instead of killed by oom_kill later. Moreover vm_enough_memory is long
> > different and apparently it's just overestimating free pages that makes
> > people unhappy with the resulted higher oom_kill/ENOMEM rate. If you
> 
> That's not really what I'm getting at.  Currently if you run a memory
> intensive application, quit after it's pages are on an lru, and try to
> restart, you won't be able to get the memory.  This is because pages which
> are sitting around in the swap cache are not counted as free, and they
> should be, because they are freeable.

No. Dirty swapcache pages which have pte's referencing them are not
freeable.


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