From: Rik van Riel <H.H.vanRiel@phys.uu.nl>
To: "Eric W. Biederman" <ebiederm+eric@ccr.net>
Cc: Linux MM <linux-mm@kvack.org>, Linus Torvalds <torvalds@transmeta.com>
Subject: Re: [PATCH] VM improvements for 2.1.131
Date: Sun, 6 Dec 1998 02:59:57 +0100 (CET) [thread overview]
Message-ID: <Pine.LNX.3.96.981206025816.14437A-100000@mirkwood.dummy.home> (raw)
In-Reply-To: <m1hfva9g1y.fsf@flinx.ccr.net>
On 5 Dec 1998, Eric W. Biederman wrote:
> >>>>> "RR" == Rik van Riel <H.H.vanRiel@phys.uu.nl> writes:
>
>
> RR /* Don't allow too many pending pages in flight.. */
> RR- if (atomic_read(&nr_async_pages) > SWAP_CLUSTER_MAX)
> RR+ if (atomic_read(&nr_async_pages) > pager_daemon.swap_cluster)
> RR wait = 1;
>
> How will this possibly work if we are using a swapfile
> and we always swap synchronously?
It won't. But if you are using a swapfile you'll always
lose. Due to on-drive track buffers and head-locality it
won't be a real performance loss though... (I hope).
What we really need is somebody to fix swapfile I/O.
regards,
Rik -- the flu hits, the flu hits, the flu hits -- MORE
+-------------------------------------------------------------------+
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next prev parent reply other threads:[~1998-12-06 2:01 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-12-06 0:34 Rik van Riel
1998-12-06 2:10 ` Eric W. Biederman
1998-12-06 1:59 ` Rik van Riel [this message]
1998-12-07 17:08 ` Stephen C. Tweedie
1998-12-07 10:47 ` Neil Conway
1998-12-07 13:04 ` Rik van Riel
1998-12-07 18:01 ` Stephen C. Tweedie
1998-12-07 22:04 ` Stephen C. Tweedie
1998-12-07 22:51 ` Rik van Riel
1998-12-09 17:43 ` Andrea Arcangeli
1998-12-09 21:05 ` Rik van Riel
1998-12-09 23:15 ` Andrea Arcangeli
1998-12-10 1:10 ` Rik van Riel
1998-12-10 13:52 ` Stephen C. Tweedie
1998-12-10 13:50 ` Stephen C. Tweedie
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