From: Bart Van Assche <bvanassche@acm.org>
To: Tomas Henzl <thenzl@redhat.com>
Cc: "'linux-scsi@vger.kernel.org'" <linux-scsi@vger.kernel.org>,
Stanislaw Gruszka <sgruszka@redhat.com>,
Mike Christie <michaelc@cs.wisc.edu>
Subject: Re: [RFC] How to fix an async scan - rmmod race?
Date: Fri, 06 Apr 2012 14:38:22 +0000 [thread overview]
Message-ID: <4F7EFFDE.3020003@acm.org> (raw)
In-Reply-To: <4F7EEBFD.8000809@redhat.com>
On 04/06/12 13:13, Tomas Henzl wrote:
> This means that after scsi_remove_host is left and the driver rmmoded
> we call scsi_host_put which in the end calls scsi_host_dev_release
> and this function tries to use the now invalid host_template
> functions again.
There are already several other ways in which the host template can be
accessed after scsi_remove_host() finished:
* Via the scsi_proc_hostdir_rm() call in scsi_host_dev_release().
* From the SCSI error handler thread.
* From inside scsi_dispatch_cmd().
Why isn't the SCSI error handler thread stopped from inside
scsi_remove_host() ? And why isn't scsi_proc_hostdir_rm() invoked from
inside scsi_remove_host() ? Am I missing something ?
Thanks,
Bart.
next prev parent reply other threads:[~2012-04-06 14:38 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-05 13:58 [RFC] How to fix an async scan - rmmod race? Tomas Henzl
2012-04-05 15:57 ` Mike Christie
2012-04-05 16:05 ` Mike Christie
2012-04-05 18:00 ` Bart Van Assche
2012-04-05 21:29 ` Mike Christie
2012-04-06 9:24 ` Bart Van Assche
2012-04-06 17:22 ` Mike Christie
2012-04-06 18:37 ` Bart Van Assche
2012-04-11 21:46 ` Mike Christie
2012-04-06 9:54 ` Tomas Henzl
2012-04-06 15:20 ` James Bottomley
2012-04-06 16:15 ` Bart Van Assche
2012-04-06 16:35 ` James Bottomley
2012-04-06 17:01 ` Bart Van Assche
2012-04-06 17:15 ` James Bottomley
2012-04-06 17:59 ` Bart Van Assche
2012-04-08 17:38 ` Bart Van Assche
2012-04-11 18:17 ` Mike Christie
2012-04-11 18:30 ` Mike Christie
2012-04-11 19:47 ` Bart Van Assche
2012-04-11 22:28 ` Mike Christie
2012-04-12 10:48 ` Bart Van Assche
2012-04-06 9:39 ` Bart Van Assche
2012-04-06 10:14 ` Tomas Henzl
2012-04-06 13:13 ` Tomas Henzl
2012-04-06 14:38 ` Bart Van Assche [this message]
2012-04-06 15:32 ` Tomas Henzl
2012-04-12 12:48 ` [RFC] How to fix an async scan - rmmod race? try_module_get Tomas Henzl
2012-04-18 16:48 ` [RFC] How to fix an async scan - 'rmmod --wait' race? Tomas Henzl
2012-04-18 18:18 ` Bart Van Assche
2012-05-17 8:42 ` James Bottomley
2012-05-17 8:55 ` Bart Van Assche
2012-05-17 9:01 ` James Bottomley
2012-05-17 14:51 ` Tomas Henzl
2012-05-22 10:05 ` James Bottomley
2012-05-25 15:13 ` Tomas Henzl
2012-05-25 18:46 ` Dan Williams
2012-05-28 11:58 ` Tomas Henzl
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