diff options
Diffstat (limited to 'Documentation/filesystems/ext3.txt')
| -rw-r--r-- | Documentation/filesystems/ext3.txt | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/Documentation/filesystems/ext3.txt b/Documentation/filesystems/ext3.txt index 867c5b50cb42..272f80d5f966 100644 --- a/Documentation/filesystems/ext3.txt +++ b/Documentation/filesystems/ext3.txt | |||
| @@ -59,8 +59,19 @@ commit=nrsec (*) Ext3 can be told to sync all its data and metadata | |||
| 59 | Setting it to very large values will improve | 59 | Setting it to very large values will improve |
| 60 | performance. | 60 | performance. |
| 61 | 61 | ||
| 62 | barrier=1 This enables/disables barriers. barrier=0 disables | 62 | barrier=<0(*)|1> This enables/disables the use of write barriers in |
| 63 | it, barrier=1 enables it. | 63 | barrier the jbd code. barrier=0 disables, barrier=1 enables. |
| 64 | nobarrier (*) This also requires an IO stack which can support | ||
| 65 | barriers, and if jbd gets an error on a barrier | ||
| 66 | write, it will disable again with a warning. | ||
| 67 | Write barriers enforce proper on-disk ordering | ||
| 68 | of journal commits, making volatile disk write caches | ||
| 69 | safe to use, at some performance penalty. If | ||
| 70 | your disks are battery-backed in one way or another, | ||
| 71 | disabling barriers may safely improve performance. | ||
| 72 | The mount options "barrier" and "nobarrier" can | ||
| 73 | also be used to enable or disable barriers, for | ||
| 74 | consistency with other ext3 mount options. | ||
| 64 | 75 | ||
| 65 | orlov (*) This enables the new Orlov block allocator. It is | 76 | orlov (*) This enables the new Orlov block allocator. It is |
| 66 | enabled by default. | 77 | enabled by default. |