diff options
Diffstat (limited to 'Documentation/filesystems/proc.txt')
-rw-r--r-- | Documentation/filesystems/proc.txt | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index 334ef2f983fa..d105eb45282a 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt | |||
@@ -1386,6 +1386,15 @@ swapcache reclaim. Decreasing vfs_cache_pressure causes the kernel to prefer | |||
1386 | to retain dentry and inode caches. Increasing vfs_cache_pressure beyond 100 | 1386 | to retain dentry and inode caches. Increasing vfs_cache_pressure beyond 100 |
1387 | causes the kernel to prefer to reclaim dentries and inodes. | 1387 | causes the kernel to prefer to reclaim dentries and inodes. |
1388 | 1388 | ||
1389 | dirty_background_bytes | ||
1390 | ---------------------- | ||
1391 | |||
1392 | Contains the amount of dirty memory at which the pdflush background writeback | ||
1393 | daemon will start writeback. | ||
1394 | |||
1395 | If dirty_background_bytes is written, dirty_background_ratio becomes a function | ||
1396 | of its value (dirty_background_bytes / the amount of dirtyable system memory). | ||
1397 | |||
1389 | dirty_background_ratio | 1398 | dirty_background_ratio |
1390 | ---------------------- | 1399 | ---------------------- |
1391 | 1400 | ||
@@ -1394,14 +1403,29 @@ pages + file cache, not including locked pages and HugePages), the number of | |||
1394 | pages at which the pdflush background writeback daemon will start writing out | 1403 | pages at which the pdflush background writeback daemon will start writing out |
1395 | dirty data. | 1404 | dirty data. |
1396 | 1405 | ||
1406 | If dirty_background_ratio is written, dirty_background_bytes becomes a function | ||
1407 | of its value (dirty_background_ratio * the amount of dirtyable system memory). | ||
1408 | |||
1409 | dirty_bytes | ||
1410 | ----------- | ||
1411 | |||
1412 | Contains the amount of dirty memory at which a process generating disk writes | ||
1413 | will itself start writeback. | ||
1414 | |||
1415 | If dirty_bytes is written, dirty_ratio becomes a function of its value | ||
1416 | (dirty_bytes / the amount of dirtyable system memory). | ||
1417 | |||
1397 | dirty_ratio | 1418 | dirty_ratio |
1398 | ----------------- | 1419 | ----------- |
1399 | 1420 | ||
1400 | Contains, as a percentage of the dirtyable system memory (free pages + mapped | 1421 | Contains, as a percentage of the dirtyable system memory (free pages + mapped |
1401 | pages + file cache, not including locked pages and HugePages), the number of | 1422 | pages + file cache, not including locked pages and HugePages), the number of |
1402 | pages at which a process which is generating disk writes will itself start | 1423 | pages at which a process which is generating disk writes will itself start |
1403 | writing out dirty data. | 1424 | writing out dirty data. |
1404 | 1425 | ||
1426 | If dirty_ratio is written, dirty_bytes becomes a function of its value | ||
1427 | (dirty_ratio * the amount of dirtyable system memory). | ||
1428 | |||
1405 | dirty_writeback_centisecs | 1429 | dirty_writeback_centisecs |
1406 | ------------------------- | 1430 | ------------------------- |
1407 | 1431 | ||