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| author | Josef Bacik <josef@toxicpanda.com> | 2020-02-14 16:11:47 -0500 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-03-23 17:02:00 +0100 |
| commit | c75e839414d3610e6487ae3145199c500d55f7f7 (patch) | |
| tree | 68e609a6362c4f259afc2e107fffac94e743a126 /fs/btrfs/ctree.h | |
| parent | efc3453494af78180ac00d9dd8391fd52c4a921e (diff) | |
| download | linux-c75e839414d3610e6487ae3145199c500d55f7f7.tar.gz linux-c75e839414d3610e6487ae3145199c500d55f7f7.tar.bz2 linux-c75e839414d3610e6487ae3145199c500d55f7f7.zip | |
btrfs: kill the subvol_srcu
Now that we have proper root ref counting everywhere we can kill the
subvol_srcu.
* removal of fs_info::subvol_srcu reduces size of fs_info by 1176 bytes
* the refcount_t used for the references checks for accidental 0->1
in cases where the root lifetime would not be properly protected
* there's a leak detector for roots to catch unfreed roots at umount
time
* SRCU served us well over the years but is was not a proper
synchronization mechanism for some cases
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index f1eef81aaa49..8aa7b9dac405 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -697,7 +697,6 @@ struct btrfs_fs_info { struct rw_semaphore cleanup_work_sem; struct rw_semaphore subvol_sem; - struct srcu_struct subvol_srcu; spinlock_t trans_lock; /* |