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Date:   Wed, 05 Dec 2018 09:33:20 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...r.kernel.org
Subject: [Bug 201685] ext4 file system corruption

https://bugzilla.kernel.org/show_bug.cgi?id=201685

--- Comment #265 from Ortwin Gl├╝ck (odi@....ch) ---
I think Jens pretty much summarized the situation in #245. To trigger the bug
blk-mq must be used together with an underlying block device (such as SCSI or
SATA) that is stateful after a rejected bio submit. Then it's just a matter of
enough concurrent I/O.

So a workaround is to just disable blk-mq with SCIS: scsi_mod.use_blk_mq=1

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