From: Rik van Riel <H.H.vanRiel@fys.ruu.nl>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: linux-mm <linux-mm@kvack.org>
Subject: swapout frenzy solution
Date: Thu, 5 Mar 1998 22:22:21 +0100 (MET) [thread overview]
Message-ID: <Pine.LNX.3.91.980305221552.448A-100000@mirkwood.dummy.home> (raw)
Hi Linus,
I've just come up with a simple 'solution' for the swapout
frenzy experienced by the recent free_memory_available()
test in kswapd.
We simply stop kswapd when nr_free_pages > free_pages_high * 4.
Since page allocation always assigns a page from the smallest
possible unit, the larger free areas are extremely likely to
grow bigger and bigger, especially when nr_free_pages is very
large, say > 3 * free_pages_high.
Since my vmscan.c is somewhat different from yours, and since
I don't know what you have done to it in the last week, I
won't send you a diff.
(trying to merge a faulty diff is _far_ more work than
doing the 30 second edit yourself :-)
I'm trying it now, and I don't see any swapout frenzies
occurring anymore...
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 reply other threads:[~1998-03-05 21:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-03-05 21:22 Rik van Riel [this message]
1998-03-05 21:49 ` Rik van Riel
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