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| author | Jan Kara <jack@suse.cz> | 2009-09-29 21:59:34 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-09-29 21:59:34 +0200 |
| commit | 8365388827663bd6fb773e3623ed9023c0f82b1d (patch) | |
| tree | e8f0166c3c17501c33375f9b1b70e702f7bbd65d /Documentation/filesystems | |
| parent | Merge branch 'writeback' of git://git.kernel.dk/linux-2.6-block (diff) | |
| download | linux-8365388827663bd6fb773e3623ed9023c0f82b1d.tar.xz linux-8365388827663bd6fb773e3623ed9023c0f82b1d.zip | |
ext4: Update documentation about quota mount options
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/ext4.txt | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt index 18b5ec8cea45..bf4f4b7e11b3 100644 --- a/Documentation/filesystems/ext4.txt +++ b/Documentation/filesystems/ext4.txt @@ -282,9 +282,16 @@ stripe=n Number of filesystem blocks that mballoc will try to use for allocation size and alignment. For RAID5/6 systems this should be the number of data disks * RAID chunk size in file system blocks. -delalloc (*) Deferring block allocation until write-out time. -nodelalloc Disable delayed allocation. Blocks are allocation - when data is copied from user to page cache. + +delalloc (*) Defer block allocation until just before ext4 + writes out the block(s) in question. This + allows ext4 to better allocation decisions + more efficiently. +nodelalloc Disable delayed allocation. Blocks are allocated + when the data is copied from userspace to the + page cache, either via the write(2) system call + or when an mmap'ed page which was previously + unallocated is written for the first time. max_batch_time=usec Maximum amount of time ext4 should wait for additional filesystem operations to be batch |