From: Bob Peterson <rpeterso@redhat.com>
Date: Thu, 27 Oct 2011 16:16:06 +0000 (-0400)
Subject: GFS2: Add readahead to sequential directory traversal
X-Git-Tag: v3.3-rc1~168^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dfe4d34b39b80faff52489f950a18523da7581bf;p=pandora-kernel.git

GFS2: Add readahead to sequential directory traversal

This patch adds read-ahead capability to GFS2's
directory hash table management.  It greatly improves
performance for some directory operations.  For example:
In one of my file systems that has 1000 directories, each
of which has 1000 files, time to execute a recursive
ls (time ls -fR /mnt/gfs2 > /dev/null) was reduced
from 2m2.814s on a stock kernel to 0m45.938s.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
---

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