https://github.com/torvalds/linux
Revision d5b81ced74afded85619ffbbe9c32ba9d82c9b1e authored by Naohiro Aota on 31 August 2022, 04:55:48 UTC, committed by David Sterba on 05 September 2022, 13:32:21 UTC
The commit 2ce543f47843 ("btrfs: zoned: wait until zone is finished when
allocation didn't progress") implemented a zone finish waiting mechanism
to the write path of zoned mode. However, using
wait_var_event()/wake_up_all() on fs_info->zone_finish_wait is wrong and
wait_var_event() just hangs because no one ever wakes it up once it goes
into sleep.

Instead, we can simply use wait_on_bit_io() and clear_and_wake_up_bit()
on fs_info->flags with a proper barrier installed.

Fixes: 2ce543f47843 ("btrfs: zoned: wait until zone is finished when allocation didn't progress")
CC: stable@vger.kernel.org # 5.16+
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
1 parent f2c3bec
History
Tip revision: d5b81ced74afded85619ffbbe9c32ba9d82c9b1e authored by Naohiro Aota on 31 August 2022, 04:55:48 UTC
btrfs: zoned: fix API misuse of zone finish waiting
Tip revision: d5b81ce
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