From: Andrew Morton <akpm@zip.com.au>
To: Linus Torvalds <torvalds@transmeta.com>,
lkml <linux-kernel@vger.kernel.org>, Jens Axboe <axboe@suse.de>
Subject: Re: [patch 1/16] unplugging fix
Date: Sun, 02 Jun 2002 00:38:58 -0700 [thread overview]
Message-ID: <3CF9CB92.A6BF921B@zip.com.au> (raw)
In-Reply-To: <3CF88852.BCFBF774@zip.com.au>
Andrew Morton wrote:
>
> There's a plugging bug in 2.5.19. Once you start pushing several disks
> hard, the new unplug code gets confused and queues are left in plugged
> state, but not on the plug list. They never get unplugged and the
> machine dies mysteriously.
>
This patch didn't fix it. It made it tons better, but I again have a
wedged box. Same symptoms - against IDE this time.
blk_plug_list is empty. queue_flags=0x03. Interestingly,
q->plug_list is non-empty, non-zero, both list members pointing at
a list which isn't either itself or blk_plug_list.
I note that the code isn't taking queues off the plug list when the queue
is destroyed. Guess that doesn't matter - we never destroy a plugged
queue...
This one is killing me.
-
next prev parent reply other threads:[~2002-06-02 7:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-01 8:39 [patch 1/16] unplugging fix Andrew Morton
2002-06-02 7:38 ` Andrew Morton [this message]
2002-06-02 8:12 ` Jens Axboe
2002-06-03 8:39 ` Jens Axboe
2002-06-03 9:14 ` Andrew Morton
2002-06-03 9:41 ` Jens Axboe
2002-06-03 19:27 ` Andrew Morton
2002-06-04 7:25 ` Jens Axboe
2002-06-04 8:09 ` Jens Axboe
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