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Update block layer to upstream v5.14, so that we can support new feature, and
align with upstream.
Most changes are in bug fixes, bfq update, blkcg update, block core and
related block drivers(drivers/block).
Request zStream for single patch from this MR to fix bug 2033623 in 8.5.0:
commit c3c99902c7bcb77eb6f2bc2cab1432dc75a3aee6
Author: Ming Lei <ming.lei>
Date: Mon Sep 27 22:18:04 2021 +0800
blk-mq: avoid to iterate over stale request
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1997338
commit 67f3b2f822b7e71cfc9b42dbd9f3144fa2933e0b
Author: Ming Lei <ming.lei>
Date: Mon Sep 6 14:50:03 2021 +0800
blk-mq: avoid to iterate over stale request
blk-mq can't run allocating driver tag and updating ->rqs[tag]
atomically, meantime blk-mq doesn't clear ->rqs[tag] after the driver
tag is released.
So there is chance to iterating over one stale request just after the
tag is allocated and before updating ->rqs[tag].
scsi_host_busy_iter() calls scsi_host_check_in_flight() to count scsi
in-flight requests after scsi host is blocked, so no new scsi command can
be marked as SCMD_STATE_INFLIGHT. However, driver tag allocation still can
be run by blk-mq core. One request is marked as SCMD_STATE_INFLIGHT,
but this request may have been kept in another slot of ->rqs[], meantime
the slot can be allocated out but ->rqs[] isn't updated yet. Then this
in-flight request is counted twice as SCMD_STATE_INFLIGHT. This way causes
trouble in handling scsi error.
Fixes the issue by not iterating over stale request.
Cc: linux-scsi.org
Cc: "Martin K. Petersen" <martin.petersen>
Reported-by: luojiaxing <luojiaxing>
Signed-off-by: Ming Lei <ming.lei>
Link: https://lore.kernel.org/r/20210906065003.439019-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe>
Signed-off-by: Ming Lei <ming.lei>
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (Important: kernel security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHSA-2022:1988