From: Jim Ramsay <jim.ramsay@gmail.com>
To: Linux-ide <linux-ide@vger.kernel.org>,
Lukasz Kosewski <lkosewsk@gmail.com>
Cc: Jeff Garzik <jgarzik@pobox.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] Add disk hotswap support to libata RESEND #2
Date: Tue, 23 Aug 2005 16:43:51 -0600 [thread overview]
Message-ID: <4789af9e050823154364c8e9eb@mail.gmail.com> (raw)
In-Reply-To: <4789af9e050823124140eb924f@mail.gmail.com>
On 8/23/05, Jim Ramsay <jim.ramsay@gmail.com> wrote:
> Then I must have found an undocumented feature! I've applied this set
> of patches to a 2.6.11 kernel (with few problems) and ran into a bunch
> of "scheduling while atomic" errors when hotplugging a drive, culprit
> being probably scsi_sysfs.c where scsi_remove_device locks a mutex, or
> perhaps when it then calls class_device_unregister, which does a
> 'down_write'.
After further debugging, it appears that the problem is the debounce
timer in libata-core.c.
Timers appear to operate in an atomic context, so timers should not be
allowed to call scsi_remove_device, which eventually schedules.
Any suggestions on the best way to fix this?
--
Jim Ramsay
"Me fail English? That's unpossible!"
next prev parent reply other threads:[~2005-08-23 22:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-01 10:02 [PATCH 3/3] Add disk hotswap support to libata RESEND #2 Lukasz Kosewski
2005-08-23 19:41 ` Jim Ramsay
2005-08-23 22:43 ` Jim Ramsay [this message]
2005-08-23 22:56 ` George Anzinger
2005-08-24 1:20 ` Stefan Richter
2005-08-24 14:03 ` Lukasz Kosewski
2005-08-24 15:11 ` Jim Ramsay
2005-08-24 16:12 ` Jim Ramsay
[not found] ` <4789af9e0508291223435f174@mail.gmail.com>
2005-08-29 19:45 ` Jim Ramsay
2005-09-06 19:02 ` Jim Ramsay
2005-09-15 4:40 ` Lukasz Kosewski
2005-09-16 16:11 ` Mark Lord
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