Re: Understanding page faults code in mm/memory.c

["Raghu R. Arur" <rra2002@aria.ncl.cs.columbia.edu>]

  No, what i meant was, if the rss value gets decremented when a page is
put into swap cache, then why is it not incremented in do_wp_page when you
fault for a page inside swap cache. if you fault, then you add it
establish the pte to the page in the swap cache. dont you need to
increment the rss value too ?? I know i am missing something over here.
Please help me in understanding it correctly.

 Thanks,
Raghu

On Thu, 31 Jul 2003, Mel Gorman wrote:

> On Thu, 31 Jul 2003, Raghu R. Arur wrote:
>
> >    But when you put a page on to the swap cache will not the rss of the
> > address spage  decrease. if not then when will the rss value of the
> > address space change.
> >
>
> vmscan.c:try_to_swap_out() will decrement the rss before adding it to the
> swap cache with add_to_swap_cache()
>
> --
> Mel Gorman
>
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