From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: Tejun Heo <tj@kernel.org>,
linux-block@vger.kernel.org, Ming Lei <ming.lei@redhat.com>
Subject: tear down file system I/O in del_gendisk v2
Date: Wed, 22 Sep 2021 19:22:18 +0200 [thread overview]
Message-ID: <20210922172222.2453343-1-hch@lst.de> (raw)
Ming reported that for SCSI we have a lifetime problem now that
the BDI moved from the request_queue to the disk as del_gendisk
doesn't finish all outstanding file system I/O. It turns out
this actually is an older problem, although the case where it could
be hit before was very unusual (unbinding of a SCSI upper driver
while the scsi_device stays around). This series fixes this by
draining all I/O in del_gendisk.
Changes since v1:
- fix a commit log typo
- keep the existing nowait vs queue dying semantics in bio_queue_enter
- actually keep q_usage_counter in atomic mode after del_gendisk
next reply other threads:[~2021-09-22 17:25 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-22 17:22 Christoph Hellwig [this message]
2021-09-22 17:22 ` [PATCH 1/4] block: factor out a blk_try_enter_queue helper Christoph Hellwig
2021-09-22 17:22 ` [PATCH 2/4] block: split bio_queue_enter from blk_queue_enter Christoph Hellwig
2021-09-22 17:22 ` [PATCH 3/4] block: drain file system I/O on del_gendisk Christoph Hellwig
2021-09-23 1:34 ` Ming Lei
2021-09-23 5:27 ` Christoph Hellwig
2021-09-23 6:39 ` Ming Lei
2021-09-27 12:04 ` Christoph Hellwig
2021-09-27 14:32 ` Ming Lei
2021-09-23 6:21 ` Hannes Reinecke
2021-09-22 17:22 ` [PATCH 4/4] block: keep q_usage_counter in atomic mode after del_gendisk Christoph Hellwig
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