diff options
| author | David Howells <dhowells@redhat.com> | 2024-05-31 15:48:29 +0100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-09-05 11:00:41 +0200 |
| commit | ef966d73fb7cab5736407998a4ae42577bb34a3b (patch) | |
| tree | 21c8fdbd665898a85ce68f2b3450e1ea61b8ef89 /fs/netfs/internal.h | |
| parent | 43ebbf939340586c504cea7d4991b0af95724603 (diff) | |
netfs: Record contention stats for writeback lock
Record statistics for contention upon the writeback serialisation lock that
prevents racing writeback calls from causing each other to interleave their
writebacks. These can be viewed in /proc/fs/netfs/stats on the WbLock line,
with skip=N indicating the number of non-SYNC writebacks skipped and wait=N
indicating the number of SYNC writebacks that waited.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: Steve French <sfrench@samba.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Link: https://lore.kernel.org/r/20240814203850.2240469-5-dhowells@redhat.com/ # v2
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/netfs/internal.h')
| -rw-r--r-- | fs/netfs/internal.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/netfs/internal.h b/fs/netfs/internal.h index 7773f3d855a9..9e6e0e59d7e4 100644 --- a/fs/netfs/internal.h +++ b/fs/netfs/internal.h @@ -117,6 +117,8 @@ extern atomic_t netfs_n_wh_upload_failed; extern atomic_t netfs_n_wh_write; extern atomic_t netfs_n_wh_write_done; extern atomic_t netfs_n_wh_write_failed; +extern atomic_t netfs_n_wb_lock_skip; +extern atomic_t netfs_n_wb_lock_wait; int netfs_stats_show(struct seq_file *m, void *v); |