diff options
Diffstat (limited to 'fs/netfs')
| -rw-r--r-- | fs/netfs/buffered_write.c | 24 | ||||
| -rw-r--r-- | fs/netfs/fscache_stats.c | 9 | ||||
| -rw-r--r-- | fs/netfs/internal.h | 1 | ||||
| -rw-r--r-- | fs/netfs/stats.c | 6 |
4 files changed, 31 insertions, 9 deletions
diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c index 08f28800232c..6cd8f7422e9a 100644 --- a/fs/netfs/buffered_write.c +++ b/fs/netfs/buffered_write.c @@ -80,10 +80,19 @@ static enum netfs_how_to_modify netfs_how_to_modify(struct netfs_inode *ctx, return NETFS_WHOLE_FOLIO_MODIFY; if (file->f_mode & FMODE_READ) - return NETFS_JUST_PREFETCH; - - if (netfs_is_cache_enabled(ctx)) - return NETFS_JUST_PREFETCH; + goto no_write_streaming; + if (test_bit(NETFS_ICTX_NO_WRITE_STREAMING, &ctx->flags)) + goto no_write_streaming; + + if (netfs_is_cache_enabled(ctx)) { + /* We don't want to get a streaming write on a file that loses + * caching service temporarily because the backing store got + * culled. + */ + if (!test_bit(NETFS_ICTX_NO_WRITE_STREAMING, &ctx->flags)) + set_bit(NETFS_ICTX_NO_WRITE_STREAMING, &ctx->flags); + goto no_write_streaming; + } if (!finfo) return NETFS_STREAMING_WRITE; @@ -95,6 +104,13 @@ static enum netfs_how_to_modify netfs_how_to_modify(struct netfs_inode *ctx, if (offset == finfo->dirty_offset + finfo->dirty_len) return NETFS_STREAMING_WRITE_CONT; return NETFS_FLUSH_CONTENT; + +no_write_streaming: + if (finfo) { + netfs_stat(&netfs_n_wh_wstream_conflict); + return NETFS_FLUSH_CONTENT; + } + return NETFS_JUST_PREFETCH; } /* diff --git a/fs/netfs/fscache_stats.c b/fs/netfs/fscache_stats.c index aad812ead398..add21abdf713 100644 --- a/fs/netfs/fscache_stats.c +++ b/fs/netfs/fscache_stats.c @@ -48,13 +48,15 @@ atomic_t fscache_n_no_create_space; EXPORT_SYMBOL(fscache_n_no_create_space); atomic_t fscache_n_culled; EXPORT_SYMBOL(fscache_n_culled); +atomic_t fscache_n_dio_misfit; +EXPORT_SYMBOL(fscache_n_dio_misfit); /* * display the general statistics */ int fscache_stats_show(struct seq_file *m) { - seq_puts(m, "FS-Cache statistics\n"); + seq_puts(m, "-- FS-Cache statistics --\n"); seq_printf(m, "Cookies: n=%d v=%d vcol=%u voom=%u\n", atomic_read(&fscache_n_cookies), atomic_read(&fscache_n_volumes), @@ -93,8 +95,9 @@ int fscache_stats_show(struct seq_file *m) atomic_read(&fscache_n_no_create_space), atomic_read(&fscache_n_culled)); - seq_printf(m, "IO : rd=%u wr=%u\n", + seq_printf(m, "IO : rd=%u wr=%u mis=%u\n", atomic_read(&fscache_n_read), - atomic_read(&fscache_n_write)); + atomic_read(&fscache_n_write), + atomic_read(&fscache_n_dio_misfit)); return 0; } diff --git a/fs/netfs/internal.h b/fs/netfs/internal.h index 3f9620d0fa63..ec7045d24400 100644 --- a/fs/netfs/internal.h +++ b/fs/netfs/internal.h @@ -123,6 +123,7 @@ extern atomic_t netfs_n_rh_write_begin; extern atomic_t netfs_n_rh_write_done; extern atomic_t netfs_n_rh_write_failed; extern atomic_t netfs_n_rh_write_zskip; +extern atomic_t netfs_n_wh_wstream_conflict; extern atomic_t netfs_n_wh_upload; extern atomic_t netfs_n_wh_upload_done; extern atomic_t netfs_n_wh_upload_failed; diff --git a/fs/netfs/stats.c b/fs/netfs/stats.c index 42db36528d92..deeba9f9dcf5 100644 --- a/fs/netfs/stats.c +++ b/fs/netfs/stats.c @@ -29,6 +29,7 @@ atomic_t netfs_n_rh_write_begin; atomic_t netfs_n_rh_write_done; atomic_t netfs_n_rh_write_failed; atomic_t netfs_n_rh_write_zskip; +atomic_t netfs_n_wh_wstream_conflict; atomic_t netfs_n_wh_upload; atomic_t netfs_n_wh_upload_done; atomic_t netfs_n_wh_upload_failed; @@ -66,9 +67,10 @@ int netfs_stats_show(struct seq_file *m, void *v) atomic_read(&netfs_n_wh_write), atomic_read(&netfs_n_wh_write_done), atomic_read(&netfs_n_wh_write_failed)); - seq_printf(m, "Netfs : rr=%u sr=%u\n", + seq_printf(m, "Netfs : rr=%u sr=%u wsc=%u\n", atomic_read(&netfs_n_rh_rreq), - atomic_read(&netfs_n_rh_sreq)); + atomic_read(&netfs_n_rh_sreq), + atomic_read(&netfs_n_wh_wstream_conflict)); return fscache_stats_show(m); } EXPORT_SYMBOL(netfs_stats_show); |