From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: Subtle MM bug
Date: 17 Apr 2001 12:37:22 -0700 [thread overview]
Message-ID: <9bi61i$5ql$1@cesium.transmeta.com> (raw)
In-Reply-To: <87wvburowk.fsf@atlas.iskon.hr> <Pine.LNX.4.31.0101181230020.31432-100000@localhost.localdomain>
Followup to: <Pine.LNX.4.31.0101181230020.31432-100000@localhost.localdomain>
By author: Rik van Riel <riel@conectiva.com.br>
In newsgroup: linux.dev.kernel
>
> Suppose you have 8 high-priority tasks waiting on kswapd
> and one lower-priority (but still higher than kswapd)
> process running and preventing kswapd from doing its work.
> Oh .. and also preventing the higher-priority tasks from
> being woken up and continuing...
>
Classic priority inversion. In this particular case it seems like it
should be unusually simple to apply priority inheritance, though (the
general case is complicated by the fact that the dependency matrix
usually isn't readily available.)
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt
next prev parent reply other threads:[~2001-04-17 19:40 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-07 20:59 Subtle MM bug Zlatko Calusic
2001-01-07 21:37 ` Rik van Riel
2001-01-07 22:33 ` Zlatko Calusic
2001-01-09 2:01 ` Zlatko Calusic
2001-01-17 4:48 ` Rik van Riel
2001-01-17 18:53 ` Zlatko Calusic
2001-01-18 1:32 ` Rik van Riel
2001-04-17 19:37 ` H. Peter Anvin [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-01-08 5:29 Wayne Whitney
2001-01-08 5:42 ` Andi Kleen
2001-01-08 6:04 ` Linus Torvalds
2001-01-08 17:44 ` Rik van Riel
2001-01-08 18:02 ` Linus Torvalds
2001-01-08 17:16 ` Rik van Riel
2001-01-08 17:58 ` Linus Torvalds
2001-01-08 23:41 ` Zlatko Calusic
2001-01-09 2:58 ` Linus Torvalds
2001-01-09 6:20 ` Eric W. Biederman
2001-01-09 7:27 ` Linus Torvalds
2001-01-09 11:38 ` Eric W. Biederman
2001-01-09 12:29 ` Zlatko Calusic
2001-01-09 18:47 ` Linus Torvalds
2001-01-09 19:09 ` Daniel Phillips
2001-01-09 19:29 ` Trond Myklebust
2001-01-10 17:32 ` Andi Kleen
2001-01-10 19:31 ` Alan Cox
2001-01-10 19:33 ` Andi Kleen
2001-01-10 19:40 ` Alan Cox
2001-01-10 19:43 ` Andi Kleen
2001-01-10 19:48 ` Alan Cox
2001-01-10 19:48 ` Andi Kleen
2001-01-11 9:51 ` Trond Myklebust
2001-01-10 20:11 ` Linus Torvalds
2001-01-11 12:56 ` Stephen C. Tweedie
2001-01-11 13:10 ` Andi Kleen
2001-01-11 13:12 ` Trond Myklebust
2001-01-11 14:13 ` Stephen C. Tweedie
2001-01-11 19:03 ` Alexander Viro
2001-01-11 19:47 ` Stephen C. Tweedie
2001-01-11 19:57 ` Alexander Viro
2001-01-11 16:50 ` Albert D. Cahalan
2001-01-11 17:35 ` Stephen C. Tweedie
2001-01-11 19:38 ` Albert D. Cahalan
2001-01-11 19:01 ` Alexander Viro
2001-01-09 19:37 ` Linus Torvalds
2001-01-17 8:46 ` Rik van Riel
2001-01-25 22:51 ` Daniel Phillips
2001-01-09 19:53 ` Simon Kirby
2001-01-09 20:08 ` Linus Torvalds
2001-01-09 20:10 ` Zlatko Calusic
2001-01-10 1:45 ` David Woodhouse
2001-01-10 2:26 ` Andrea Arcangeli
2001-01-10 6:57 ` Linus Torvalds
2001-01-10 11:46 ` David Woodhouse
2001-01-10 14:56 ` Andrea Arcangeli
2001-01-10 17:46 ` Eric W. Biederman
2001-01-10 18:33 ` Andrea Arcangeli
2001-01-17 14:26 ` Rik van Riel
2001-01-10 19:03 ` Linus Torvalds
2001-01-10 19:27 ` David S. Miller
2001-01-10 19:36 ` Alan Cox
2001-01-10 23:56 ` David Weinehall
2001-01-11 0:24 ` Alan Cox
2001-01-12 5:56 ` Ralf Baechle
2001-01-12 16:10 ` Eric W. Biederman
2001-01-12 21:11 ` Russell King
2001-01-15 2:56 ` Ralf Baechle
2001-01-15 6:59 ` Eric W. Biederman
2001-01-15 2:53 ` Ralf Baechle
2001-01-17 14:28 ` Rik van Riel
2001-01-18 1:23 ` Linus Torvalds
2001-01-18 11:48 ` Rik van Riel
2001-01-10 17:03 ` Linus Torvalds
2001-01-11 14:36 ` Jim Gettys
2001-01-08 21:30 ` Wayne Whitney
2001-01-08 20:39 Szabolcs Szakacsits
2001-01-08 21:56 ` Wayne Whitney
2001-01-08 23:22 ` Wayne Whitney
2001-01-08 23:30 ` Andrea Arcangeli
2001-01-09 0:37 ` Linus Torvalds
2001-01-08 22:00 ` Wayne Whitney
2001-01-08 22:15 ` Andrea Arcangeli
2001-01-10 19:57 Chris Wing
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