WSL2-Linux-Kernel/fs/jbd2
Theodore Ts'o 0705e8d1e2 ext4: inline jbd2_journal_[un]register_shrinker()
The function jbd2_journal_unregister_shrinker() was getting called
twice when the file system was getting unmounted.  On Power and ARM
platforms this was causing kernel crash when unmounting the file
system, when a percpu_counter was destroyed twice.

Fix this by removing jbd2_journal_[un]register_shrinker() functions,
and inlining the shrinker setup and teardown into
journal_init_common() and jbd2_journal_destroy().  This means that
ext4 and ocfs2 now no longer need to know about registering and
unregistering jbd2's shrinker.

Also, while we're at it, rename the percpu counter from
j_jh_shrink_count to j_checkpoint_jh_count, since this makes it
clearer what this counter is intended to track.

Link: https://lore.kernel.org/r/20210705145025.3363130-1-tytso@mit.edu
Fixes: 4ba3fcdde7 ("jbd2,ext4: add a shrinker to release checkpointed buffers")
Reported-by: Jon Hunter <jonathanh@nvidia.com>
Reported-by: Sachin Sant <sachinp@linux.vnet.ibm.com>
Tested-by: Sachin Sant <sachinp@linux.vnet.ibm.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-07-08 08:37:31 -04:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
checkpoint.c ext4: inline jbd2_journal_[un]register_shrinker() 2021-07-08 08:37:31 -04:00
commit.c block: use an on-stack bio in blkdev_issue_flush 2021-01-27 09:51:48 -07:00
journal.c ext4: inline jbd2_journal_[un]register_shrinker() 2021-07-08 08:37:31 -04:00
recovery.c ext4: fix debug format string warning 2021-04-09 23:32:16 -04:00
revoke.c jbd2: Reserve space for revoke descriptor blocks 2019-11-05 16:00:48 -05:00
transaction.c jbd2: don't abort the journal when freeing buffers 2021-06-24 10:33:50 -04:00