From: Rik van Riel <H.H.vanRiel@fys.ruu.nl>
To: "Stephen C. Tweedie" <sct@dcs.ed.ac.uk>
Cc: "Benjamin C.R. LaHaise" <blah@kvack.org>,
linux-mm@kvack.org, torvalds@transmeta.com
Subject: Re: reverse pte lookups and anonymous private mappings; avl trees?
Date: Thu, 5 Mar 1998 00:20:39 +0100 (MET) [thread overview]
Message-ID: <Pine.LNX.3.91.980305001855.1439B-100000@mirkwood.dummy.home> (raw)
In-Reply-To: <199803042126.VAA01736@dax.dcs.ed.ac.uk>
On Wed, 4 Mar 1998, Stephen C. Tweedie wrote:
> > +#define PgQ_Locked 0 /* page is unswappable - mlock()'d */
> > +#define PgQ_Active 1 /* page is mapped and active -> young */
> > +#define PgQ_Inactive 2 /* page is mapped, but hasn't been referenced recently -> old */
> > +#define PgQ_Swappable 3 /* page has no mappings, is dirty */
> > +#define PgQ_Swapping 4 /* page is being swapped */
> > +#define PgQ_Dumpable 5 /* page has no mappings, is not dirty, but is still in the page cache */
>
> don't seem to give us all that much extra, since we probably never want
> to go out and explicitly search for all pages on such lists. (That's
> assuming that the page aging and swapping scanner is working by walking
> pages in physical address order, not by traversing any other lists.)
We just might want to do that. If we can _guarantee_
a certain number of free+(inactive&clean) pages, we
can keep the number of free pages lower, and we can
keep more pages longer in memory, giving more speed
to the overall system.
Rik.
+-----------------------------+------------------------------+
| For Linux mm-patches, go to | "I'm busy managing memory.." |
| my homepage (via LinuxHQ). | H.H.vanRiel@fys.ruu.nl |
| ...submissions welcome... | http://www.fys.ruu.nl/~riel/ |
+-----------------------------+------------------------------+
next prev parent reply other threads:[~1998-03-04 23:20 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-03-02 19:04 Benjamin C.R. LaHaise
1998-03-02 23:03 ` Stephen C. Tweedie
1998-03-02 23:37 ` Rik van Riel
1998-03-03 6:29 ` Benjamin C.R. LaHaise
1998-03-03 23:49 ` Stephen C. Tweedie
1998-03-04 21:26 ` Stephen C. Tweedie
1998-03-04 23:20 ` Rik van Riel [this message]
1998-03-05 4:21 ` Benjamin C.R. LaHaise
1998-03-05 22:25 ` Stephen C. Tweedie
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