From: Andrea Arcangeli <andrea@suse.de>
To: Ingo Molnar <mingo@elte.hu>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Marcelo Tosatti <marcelo@conectiva.com.br>,
Linus Torvalds <torvalds@transmeta.com>,
Rik van Riel <riel@conectiva.com.br>,
Roger Larsson <roger.larsson@norran.net>,
MM mailing list <linux-mm@kvack.org>,
linux-kernel@vger.kernel.org
Subject: Re: the new VM
Date: Mon, 25 Sep 2000 17:48:15 +0200 [thread overview]
Message-ID: <20000925174815.E25814@athlon.random> (raw)
In-Reply-To: <Pine.LNX.4.21.0009251714480.9122-100000@elte.hu>; from mingo@elte.hu on Mon, Sep 25, 2000 at 05:16:06PM +0200
On Mon, Sep 25, 2000 at 05:16:06PM +0200, Ingo Molnar wrote:
> situation is just 1% RAM away from the 'root cannot log in', situation.
The root cannot log in is a little different. Just think that in the "root
cannot log in" you only need to press SYSRQ+E (or as worse +I).
If all tasks in the systems are hanging into the GFP loop SYSRQ+I won't solve
the deadlock.
Ok you can add a signal check in the memory balancing code but that looks an
ugly hack that shows the difference between the two cases (the one Alan pointed
out is real deadlock, the current one is kind of live lock that can go away any
time, while the deadlock can reach the point where it can't be recovered
without an hack from an irq somewhere).
Andrea
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next prev parent reply other threads:[~2000-09-25 15:48 UTC|newest]
Thread overview: 243+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-09-24 10:11 __GFP_IO && shrink_[d|i]cache_memory()? Ingo Molnar
2000-09-24 18:11 ` Linus Torvalds
2000-09-24 18:40 ` Ingo Molnar
2000-09-24 18:39 ` Linus Torvalds
2000-09-24 18:46 ` Linus Torvalds
2000-09-24 18:59 ` Ingo Molnar
2000-09-24 19:34 ` [patch] vmfixes-2.4.0-test9-B2 Ingo Molnar
2000-09-24 20:20 ` Rui Sousa
2000-09-24 20:24 ` Andrea Arcangeli
2000-09-24 20:26 ` Ingo Molnar
2000-09-24 21:12 ` Andrea Arcangeli
2000-09-24 21:12 ` Ingo Molnar
2000-09-24 21:43 ` Stephen C. Tweedie
2000-09-24 22:13 ` Andrea Arcangeli
2000-09-24 22:36 ` [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks bert hubert
2000-09-24 23:41 ` Andrea Arcangeli
2000-09-25 16:24 ` Stephen C. Tweedie
2000-09-25 17:03 ` Andrea Arcangeli
2000-09-25 18:06 ` Stephen C. Tweedie
2000-09-25 19:32 ` Andrea Arcangeli
2000-09-25 19:26 ` Rik van Riel
2000-09-25 22:28 ` Andrea Arcangeli
2000-09-25 22:26 ` Rik van Riel
2000-09-25 22:51 ` Andrea Arcangeli
2000-09-25 22:30 ` Linus Torvalds
2000-09-25 23:03 ` Andrea Arcangeli
2000-09-25 23:18 ` Linus Torvalds
2000-09-26 0:32 ` Andrea Arcangeli
2000-09-25 22:30 ` Juan J. Quintela
2000-09-25 23:00 ` Andrea Arcangeli
2000-09-25 19:54 ` Stephen C. Tweedie
2000-09-25 22:44 ` Andrea Arcangeli
2000-09-25 22:42 ` Rik van Riel
2000-09-26 6:54 ` Christoph Rohland
2000-09-26 14:05 ` Andrea Arcangeli
2000-09-26 16:20 ` Christoph Rohland
2000-09-26 17:10 ` Andrea Arcangeli
2000-09-27 8:11 ` Christoph Rohland
2000-09-27 8:28 ` Ingo Molnar
2000-09-27 9:24 ` Christoph Rohland
2000-09-27 13:56 ` Andrea Arcangeli
2000-09-27 16:56 ` Christoph Rohland
2000-09-27 17:42 ` Andrea Arcangeli
2000-09-27 18:25 ` Erik Andersen
2000-09-27 18:55 ` Andrea Arcangeli
2000-09-28 10:08 ` Rik van Riel
2000-09-28 11:16 ` Rik van Riel
2000-09-28 14:52 ` Andrea Arcangeli
2000-09-29 14:39 ` Rik van Riel
2000-09-29 14:55 ` Andrea Arcangeli
2000-09-29 15:40 ` Rik van Riel
2000-09-28 11:31 ` Ingo Molnar
2000-09-28 14:54 ` Andrea Arcangeli
2000-09-28 15:13 ` Ingo Molnar
2000-09-28 15:23 ` Andrea Arcangeli
2000-09-28 16:16 ` Juan J. Quintela
2000-09-28 14:31 ` Andrea Arcangeli
2000-09-25 17:21 ` bert hubert
2000-09-25 17:49 ` Andrea Arcangeli
2000-09-25 15:09 ` Miles Lane
2000-09-25 15:51 ` Stephen C. Tweedie
2000-09-25 16:05 ` Ingo Molnar
2000-09-25 16:06 ` Alexander Viro
2000-09-25 16:20 ` Ingo Molnar
2000-09-25 16:29 ` Andrea Arcangeli
2000-09-25 4:56 ` [patch] vmfixes-2.4.0-test9-B2 Linus Torvalds
2000-09-25 5:19 ` Alexander Viro
2000-09-25 6:06 ` Linus Torvalds
2000-09-25 6:17 ` Alexander Viro
2000-09-25 21:21 ` Alexander Viro
2000-09-26 13:42 ` [CFT][PATCH] ext2 directories in pagecache Alexander Viro
2000-09-26 21:29 ` Alexander Viro
2000-09-26 22:16 ` Marko Kreen
2000-09-26 22:31 ` Alexander Viro
2000-09-26 22:47 ` Marko Kreen
2000-09-27 7:32 ` Ingo Molnar
2000-09-27 9:22 ` Alexander Viro
2000-09-26 23:19 ` Andreas Dilger
2000-09-26 23:33 ` Alexander Viro
2000-09-26 23:44 ` Alexander Viro
2000-09-25 0:09 ` [patch] vmfixes-2.4.0-test9-B2 Linus Torvalds
2000-09-25 0:49 ` Alexander Viro
2000-09-25 0:53 ` Marcelo Tosatti
2000-09-25 1:45 ` Andrea Arcangeli
2000-09-25 2:39 ` Marcelo Tosatti
2000-09-25 15:36 ` Andrea Arcangeli
2000-09-25 10:42 ` the new VM Ingo Molnar
2000-09-25 13:02 ` Andrea Arcangeli
2000-09-25 13:02 ` Ingo Molnar
2000-09-25 13:08 ` Andrea Arcangeli
2000-09-25 13:12 ` Ingo Molnar
2000-09-25 13:30 ` Andrea Arcangeli
2000-09-25 13:39 ` Ingo Molnar
2000-09-25 14:04 ` Andrea Arcangeli
2000-09-25 14:04 ` Ingo Molnar
2000-09-25 14:23 ` Andrea Arcangeli
2000-09-25 14:27 ` Ingo Molnar
2000-09-25 14:39 ` Andrea Arcangeli
2000-09-25 14:43 ` Ingo Molnar
2000-09-25 15:01 ` Andrea Arcangeli
2000-09-25 15:10 ` Ingo Molnar
2000-09-25 15:24 ` Andrea Arcangeli
2000-09-25 15:26 ` Ingo Molnar
2000-09-25 15:22 ` yodaiken
2000-09-26 19:10 ` Pavel Machek
2000-09-26 20:16 ` Andrea Arcangeli
2000-09-27 7:42 ` Ingo Molnar
2000-09-27 12:11 ` yodaiken
2000-09-27 14:08 ` Andrea Arcangeli
2000-09-25 16:09 ` Rik van Riel
2000-09-25 14:26 ` Marcelo Tosatti
2000-09-25 14:50 ` Andrea Arcangeli
2000-09-25 14:47 ` Alan Cox
2000-09-25 15:16 ` Ingo Molnar
2000-09-25 15:16 ` the new VMt Alan Cox
2000-09-25 15:33 ` the new VM Ingo Molnar
2000-09-25 15:41 ` the new VMt Andrea Arcangeli
2000-09-25 16:02 ` Ingo Molnar
2000-09-25 16:04 ` Andi Kleen
2000-09-25 16:19 ` Ingo Molnar
2000-09-25 16:18 ` Andi Kleen
2000-09-25 16:41 ` Andrea Arcangeli
2000-09-25 16:35 ` Linus Torvalds
2000-09-25 16:41 ` Rik van Riel
2000-09-25 16:49 ` Linus Torvalds
2000-09-25 17:03 ` Ingo Molnar
2000-09-25 17:17 ` Andrea Arcangeli
2000-09-25 17:10 ` Rik van Riel
2000-09-25 17:27 ` Andrea Arcangeli
2000-09-25 17:15 ` Andrea Arcangeli
2000-09-27 7:14 ` Rusty Russell
2000-09-25 20:23 ` Russell King
2000-09-25 16:28 ` Rik van Riel
2000-09-25 16:11 ` Andrea Arcangeli
2000-09-25 16:22 ` Ingo Molnar
2000-09-25 16:17 ` Alexander Viro
2000-09-25 16:36 ` Jeff Garzik
2000-09-25 16:57 ` Alan Cox
2000-09-25 17:01 ` Alexander Viro
2000-09-25 17:06 ` Alan Cox
2000-09-25 17:31 ` Oliver Xymoron
2000-09-25 17:51 ` Jeff Garzik
2000-09-25 19:03 ` the new VMt [4MB+ blocks] Matti Aarnio
2000-09-25 20:02 ` Stephen Williams
2000-09-25 16:33 ` the new VMt Andrea Arcangeli
2000-09-26 8:38 ` Jes Sorensen
2000-09-26 8:52 ` Ingo Molnar
2000-09-26 9:02 ` Jes Sorensen
2000-09-25 16:53 ` Alan Cox
2000-09-25 15:42 ` Stephen C. Tweedie
2000-09-25 16:05 ` Andrea Arcangeli
2000-09-25 16:22 ` Rik van Riel
2000-09-25 16:42 ` Andrea Arcangeli
2000-09-25 17:39 ` Stephen C. Tweedie
2000-09-25 16:51 ` Alan Cox
2000-09-25 17:43 ` Stephen C. Tweedie
2000-09-25 18:13 ` Alan Cox
2000-09-25 18:21 ` Stephen C. Tweedie
2000-09-25 19:09 ` Alan Cox
2000-09-25 19:21 ` Stephen C. Tweedie
2000-09-25 16:52 ` yodaiken
2000-09-25 17:18 ` Jamie Lokier
2000-09-25 17:51 ` yodaiken
2000-09-25 18:04 ` Jamie Lokier
2000-09-25 18:13 ` yodaiken
2000-09-25 18:24 ` Stephen C. Tweedie
2000-09-25 18:34 ` yodaiken
2000-09-25 18:48 ` Jamie Lokier
2000-09-25 19:25 ` Stephen C. Tweedie
2000-09-25 20:04 ` yodaiken
2000-09-25 20:23 ` Alan Cox
2000-09-25 20:35 ` yodaiken
2000-09-25 20:46 ` Alan Cox
2000-09-25 21:07 ` yodaiken
2000-09-26 9:54 ` Stephen C. Tweedie
2000-09-26 13:17 ` yodaiken
2000-09-25 20:47 ` Benjamin C.R. LaHaise
2000-09-25 21:12 ` yodaiken
2000-09-26 10:07 ` Stephen C. Tweedie
2000-09-26 13:30 ` yodaiken
2000-09-25 20:32 ` Stephen C. Tweedie
2000-09-26 12:10 ` Mark Hemment
2000-09-27 10:13 ` Andrey Savochkin
2000-09-27 12:55 ` Hugh Dickins
2000-09-28 3:25 ` Andrey Savochkin
2000-09-25 23:14 ` Erik Andersen
2000-09-26 15:17 ` yodaiken
2000-09-26 16:04 ` Stephen C. Tweedie
2000-09-26 17:02 ` Erik Andersen
2000-09-26 17:08 ` Stephen C. Tweedie
2000-09-26 17:45 ` Erik Andersen
2000-09-27 10:20 ` Andrey Savochkin
2000-09-26 21:13 ` Eric Lowe
2000-09-25 18:20 ` Andrea Arcangeli
2000-09-25 16:16 ` Rik van Riel
2000-09-25 16:55 ` Alan Cox
2000-09-25 15:48 ` Andrea Arcangeli [this message]
2000-09-25 15:40 ` the new VM Stephen C. Tweedie
2000-09-25 16:01 ` Andrea Arcangeli
2000-09-25 14:37 ` Rik van Riel
2000-09-25 20:34 ` Christoph Rohland
2000-10-06 16:14 ` Rik van Riel
2000-10-09 7:37 ` Christoph Rohland
2000-09-25 13:04 ` Ingo Molnar
2000-09-25 13:19 ` Andrea Arcangeli
2000-09-25 13:18 ` Ingo Molnar
2000-09-25 13:21 ` Ingo Molnar
2000-09-25 13:31 ` Andrea Arcangeli
2000-09-25 13:47 ` Ingo Molnar
2000-09-25 14:04 ` Andrea Arcangeli
2000-09-25 1:31 ` [patch] vmfixes-2.4.0-test9-B2 Andrea Arcangeli
2000-09-25 1:27 ` Alexander Viro
2000-09-25 2:02 ` Andrea Arcangeli
2000-09-25 2:01 ` Alexander Viro
2000-09-25 13:47 ` Stephen C. Tweedie
2000-09-25 10:13 ` Ingo Molnar
2000-09-25 12:58 ` Andrea Arcangeli
2000-09-25 13:10 ` Ingo Molnar
2000-09-25 13:49 ` Jens Axboe
2000-09-25 14:11 ` Ingo Molnar
2000-09-25 14:05 ` Jens Axboe
2000-09-25 16:46 ` Linus Torvalds
2000-09-25 17:05 ` Ingo Molnar
2000-09-25 17:23 ` Andrea Arcangeli
2000-09-25 14:20 ` Andrea Arcangeli
2000-09-25 14:11 ` Jens Axboe
2000-09-25 14:33 ` Andrea Arcangeli
2000-09-25 13:56 ` Andrea Arcangeli
2000-09-25 13:57 ` Ingo Molnar
2000-09-25 14:13 ` Andrea Arcangeli
2000-09-25 14:08 ` Jens Axboe
2000-09-25 14:29 ` Andrea Arcangeli
2000-09-25 14:18 ` Jens Axboe
2000-09-25 14:47 ` Andrea Arcangeli
2000-09-25 21:28 ` Jens Axboe
2000-09-25 22:14 ` Andrea Arcangeli
2000-09-25 14:13 ` Ingo Molnar
2000-09-25 14:29 ` Ingo Molnar
2000-09-25 14:46 ` Andrea Arcangeli
2000-09-25 14:53 ` Ingo Molnar
2000-09-25 15:02 ` Andrea Arcangeli
2000-09-24 21:38 ` __GFP_IO && shrink_[d|i]cache_memory()? Stephen C. Tweedie
2000-09-24 23:20 ` Alan Cox
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