Re: kernel BUG scsi_dh_alua sleeping from invalid context && kernel WARNING do not call blocking ops when !TASK_RUNNING

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To: Martin Wilck <mwilck@xxxxxxxx>, Steffen Maier <maier@xxxxxxxxxxxxx>, linux-scsi <linux-scsi@xxxxxxxxxxxxxxx>
Subject: Re: kernel BUG scsi_dh_alua sleeping from invalid context && kernel WARNING do not call blocking ops when !TASK_RUNNING
From: Bart Van Assche <bvanassche@xxxxxxx>
Date: Tue, 17 Jan 2023 13:52:46 -0800
Cc: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, "James E . J . Bottomley" <jejb@xxxxxxxxxxxxx>, Sachin Sant <sachinp@xxxxxxxxxxxxx>, Hannes Reinecke <hare@xxxxxxx>, Benjamin Block <bblock@xxxxxxxxxxxxx>, linux-s390 <linux-s390@xxxxxxxxxxxxxxx>
In-reply-to: <ab7d61dd7f7c0289114e36fef6e9f282ad5c976b.camel@suse.com>
References: <b49e37d5-edfb-4c56-3eeb-62c7d5855c00@linux.ibm.com> <017b6c73f56505e63519e4b79fe69d66abddf810.camel@suse.com> <a9da2b27-882f-bc8e-3400-cb53440e2159@acm.org> <125f247806396f19fd27dcfa71f530b5b4a529a6.camel@suse.com> <c23a6bf4-0b6e-0bbb-b74d-af69756bcf9a@acm.org> <ab7d61dd7f7c0289114e36fef6e9f282ad5c976b.camel@suse.com>
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On 1/17/23 13:48, Martin Wilck wrote:

Yes, that was my suggestion. Just defer the scsi_device_put() call in
alua_rtpg_queue() in the case where the actual RTPG handler is not
queued. I won't have time for that before next week though.


Hi Martin,

Do you agree that the call trace shared by Steffen is not sufficient toconclude that this change is necessary?


Thanks,

Bart.

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