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Christoph Hellwig 1e1a9cecfa block: force noio scope in blk_mq_freeze_queue

When block drivers or the core block code perform allocations with a
frozen queue, this could try to recurse into the block device to
reclaim memory and deadlock.  Thus all allocations done by a process
that froze a queue need to be done without __GFP_IO and __GFP_FS.
Instead of tying to track all of them down, force a noio scope as
part of freezing the queue.

Note that nvme is a bit of a mess here due to the non-owner freezes,
and they will be addressed separately.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20250131120352.1315351-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2025-01-31 07:20:08 -07:00

aoe.h

aoe: Avoid flush_scheduled_work() usage

2022-05-01 06:41:41 -06:00

aoeblk.c

block: remove BLK_MQ_F_SHOULD_MERGE

2024-12-23 08:17:23 -07:00

aoechr.c

aoe: make aoe_class a static const structure

2023-06-21 07:45:19 -06:00

aoecmd.c

block-6.12-20241004