Re: filecache/swapcache questions [RFC] [RFT] [PATCH] kanoj-mm12-2.3.8

["Stephen C. Tweedie" <sct@redhat.com>]

Hi,

On Mon, 28 Jun 1999 12:55:23 -0700 (PDT), kanoj@google.engr.sgi.com
(Kanoj Sarcar) said:

> Agreed this would be a nice thing to be able to do ...  Other than the
> deadlock problem, there's another issue involved, I think. Processes
> can go to sleep (inside drivers/fs for example while
> mmaping/munmaping/faulting) holding their mmap_sem, so any solution
> should be able to guarantee that (at least one of) the memory free'ers
> do not go to sleep indefinitely (or for some time that is upto
> driver/fs code to determine).

Which is why we don't take the mm semaphore in swapout.

--Stephen
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