diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/device-mapper/writecache.rst | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/admin-guide/device-mapper/writecache.rst b/Documentation/admin-guide/device-mapper/writecache.rst index 977f82b5a811..65427d8dfca6 100644 --- a/Documentation/admin-guide/device-mapper/writecache.rst +++ b/Documentation/admin-guide/device-mapper/writecache.rst @@ -12,7 +12,6 @@ first sector should contain valid superblock from previous invocation. Constructor parameters: 1. type of the cache device - "p" or "s" - - p - persistent memory - s - SSD 2. the underlying device that will be cached @@ -21,7 +20,6 @@ Constructor parameters: size) 5. the number of optional parameters (the parameters with an argument count as two) - start_sector n (default: 0) offset from the start of cache device in 512-byte sectors high_watermark n (default: 50) @@ -71,6 +69,9 @@ Constructor parameters: metadata_only only metadata is promoted to the cache. This option improves performance for heavier REQ_META workloads. + pause_writeback n (default: 3000) + pause writeback if there was some write I/O redirected to + the origin volume in the last n milliseconds Status: 1. error indicator - 0 if there was no error, otherwise error number |