From 2fbe8d1ebe004425b4f7b8bba345623d2280be82 Mon Sep 17 00:00:00 2001 From: Sunil Mushran Date: Thu, 20 Dec 2007 14:58:11 -0800 Subject: ocfs2: Local alloc window size changeable via mount option Local alloc is a performance optimization in ocfs2 in which a node takes a window of bits from the global bitmap and then uses that for all small local allocations. This window size is fixed to 8MB currently. This patch allows users to specify the window size in MB including disabling it by passing in 0. If the number specified is too large, the fs will use the default value of 8MB. mount -o localalloc=X /dev/sdX /mntpoint Signed-off-by: Sunil Mushran Signed-off-by: Mark Fasheh --- Documentation/filesystems/ocfs2.txt | 3 +++ 1 file changed, 3 insertions(+) (limited to 'Documentation') diff --git a/Documentation/filesystems/ocfs2.txt b/Documentation/filesystems/ocfs2.txt index b63bd2d7fcd3..071fad137eb5 100644 --- a/Documentation/filesystems/ocfs2.txt +++ b/Documentation/filesystems/ocfs2.txt @@ -72,3 +72,6 @@ commit=nrsec (*) Ocfs2 can be told to sync all its data and metadata it at the default (5 seconds). Setting it to very large values will improve performance. +localalloc=8(*) Allows custom localalloc size in MB. If the value is too + large, the fs will silently revert it to the default. + Localalloc is not enabled for local mounts. -- cgit v1.2.3-59-g8ed1b