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| author | Jens Axboe <jens.axboe@oracle.com> | 2009-10-05 09:30:10 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-10-05 09:30:10 +0200 |
| commit | 5d13379a4dba717fb75b749acc0f928c2c02db17 (patch) | |
| tree | ab5bf870206e6ea8e744390cdb37cb14f7e78257 /Documentation/filesystems/ext4.txt | |
| parent | 08dc8726d4be85bca793141c827574fd32a681bb (diff) | |
| parent | 374576a8b6f865022c0fd1ca62396889b23d66dd (diff) | |
| download | kernel_samsung_smdk4412-5d13379a4dba717fb75b749acc0f928c2c02db17.zip kernel_samsung_smdk4412-5d13379a4dba717fb75b749acc0f928c2c02db17.tar.gz kernel_samsung_smdk4412-5d13379a4dba717fb75b749acc0f928c2c02db17.tar.bz2 | |
Merge branch 'master' into for-2.6.33
Diffstat (limited to 'Documentation/filesystems/ext4.txt')
| -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 18b5ec8..bf4f4b7 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 |