From: Jens Axboe <axboe@suse.de>
To: Lee Revell <rlrevell@joe-job.com>
Cc: Ingo Molnar <mingo@elte.hu>, linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: CFQ + 2.6.13-rc4-RT-V0.7.52-02 = BUG: scheduling with irqs disabled
Date: Wed, 24 Aug 2005 19:47:04 +0200 [thread overview]
Message-ID: <20050824174702.GL28272@suse.de> (raw)
In-Reply-To: <1124899329.3855.12.camel@mindpipe>
On Wed, Aug 24 2005, Lee Revell wrote:
> Just found this in dmesg.
>
> BUG: scheduling with irqs disabled: libc6.postinst/0x20000000/13229
> caller is ___down_mutex+0xe9/0x1a0
> [<c029c1f9>] schedule+0x59/0xf0 (8)
> [<c029ced9>] ___down_mutex+0xe9/0x1a0 (28)
> [<c0221832>] cfq_exit_single_io_context+0x22/0xa0 (84)
> [<c02218ea>] cfq_exit_io_context+0x3a/0x50 (16)
> [<c021db84>] exit_io_context+0x64/0x70 (16)
> [<c011efda>] do_exit+0x5a/0x3e0 (20)
> [<c011f3ca>] do_group_exit+0x2a/0xb0 (24)
> [<c0103039>] syscall_call+0x7/0xb (20)
Hmm, Ingo I seem to remember you saying that the following construct:
local_irq_save(flags);
spin_lock(lock);
which is equivelant to spin_lock_irqsave() in mainline being illegal in
-RT, is that correct? This is what cfq uses right now for an exiting
task, as the above trace indicates.
--
Jens Axboe
next prev parent reply other threads:[~2005-08-24 17:47 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-24 16:02 CFQ + 2.6.13-rc4-RT-V0.7.52-02 = BUG: scheduling with irqs disabled Lee Revell
2005-08-24 17:47 ` Jens Axboe [this message]
2005-08-24 21:35 ` Esben Nielsen
2005-08-25 6:10 ` Jens Axboe
2005-08-25 7:40 ` Ingo Molnar
2005-08-25 6:09 ` Ingo Molnar
2005-08-25 6:22 ` Jens Axboe
2005-08-25 7:52 ` Ingo Molnar
2005-08-25 11:17 ` Jens Axboe
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