From 833f73299fdf4497af1552e219e95661f4d2cdca Mon Sep 17 00:00:00 2001 From: Dave Kleikamp Date: Mon, 18 Sep 2006 20:12:33 -0700 Subject: [PATCH] EXT2: Remove superblock lock contention in ext2_statfs Fix a performance degradation introduced in 2.6.17. (30% degradation running dbench with 16 threads) Commit 21730eed11de42f22afcbd43f450a1872a0b5ea1, which claims to make EXT2_DEBUG work again, moves the taking of the kernel lock out of debug-only code in ext2_count_free_inodes and ext2_count_free_blocks and into ext2_statfs. The same problem was fixed in ext3 by removing the lock completely (commit 5b11687924e40790deb0d5f959247ade82196665) Signed-off-by: Dave Kleikamp Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/ext2/super.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'fs/ext2/super.c') diff --git a/fs/ext2/super.c b/fs/ext2/super.c index ca5bfb6914d..4286ff6330b 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -1083,7 +1083,6 @@ static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf) unsigned long overhead; int i; - lock_super(sb); if (test_opt (sb, MINIX_DF)) overhead = 0; else { @@ -1124,7 +1123,6 @@ static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf) buf->f_files = le32_to_cpu(sbi->s_es->s_inodes_count); buf->f_ffree = ext2_count_free_inodes (sb); buf->f_namelen = EXT2_NAME_LEN; - unlock_super(sb); return 0; } -- cgit v1.2.3