diff options
| -rw-r--r-- | fs/netfs/internal.h | 2 | ||||
| -rw-r--r-- | fs/netfs/stats.c | 5 | ||||
| -rw-r--r-- | fs/netfs/write_issue.c | 10 |
3 files changed, 14 insertions, 3 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); diff --git a/fs/netfs/stats.c b/fs/netfs/stats.c index 95ed2d2623a8..5fe1c396e24f 100644 --- a/fs/netfs/stats.c +++ b/fs/netfs/stats.c @@ -39,6 +39,8 @@ atomic_t netfs_n_wh_upload_failed; atomic_t netfs_n_wh_write; atomic_t netfs_n_wh_write_done; atomic_t netfs_n_wh_write_failed; +atomic_t netfs_n_wb_lock_skip; +atomic_t netfs_n_wb_lock_wait; int netfs_stats_show(struct seq_file *m, void *v) { @@ -78,6 +80,9 @@ int netfs_stats_show(struct seq_file *m, void *v) atomic_read(&netfs_n_rh_rreq), atomic_read(&netfs_n_rh_sreq), atomic_read(&netfs_n_wh_wstream_conflict)); + seq_printf(m, "WbLock : skip=%u wait=%u\n", + atomic_read(&netfs_n_wb_lock_skip), + atomic_read(&netfs_n_wb_lock_wait)); return fscache_stats_show(m); } EXPORT_SYMBOL(netfs_stats_show); diff --git a/fs/netfs/write_issue.c b/fs/netfs/write_issue.c index 3f7e37e50c7d..44f35a0faaca 100644 --- a/fs/netfs/write_issue.c +++ b/fs/netfs/write_issue.c @@ -505,10 +505,14 @@ int netfs_writepages(struct address_space *mapping, struct folio *folio; int error = 0; - if (wbc->sync_mode == WB_SYNC_ALL) + if (!mutex_trylock(&ictx->wb_lock)) { + if (wbc->sync_mode == WB_SYNC_NONE) { + netfs_stat(&netfs_n_wb_lock_skip); + return 0; + } + netfs_stat(&netfs_n_wb_lock_wait); mutex_lock(&ictx->wb_lock); - else if (!mutex_trylock(&ictx->wb_lock)) - return 0; + } /* Need the first folio to be able to set up the op. */ folio = writeback_iter(mapping, wbc, NULL, &error); |