From: Jan Kara Date: Tue, 29 Sep 2009 19:59:34 +0000 (-0400) Subject: ext4: Update documentation about quota mount options X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=8365388827663bd6fb773e3623ed9023c0f82b1d;p=openwrt%2Fstaging%2Fblogic.git ext4: Update documentation about quota mount options Signed-off-by: Jan Kara Signed-off-by: "Theodore Ts'o" --- 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