[Ocfs2-commits] smushran commits r3075 - tags/ocfs2-1.2.7/fs/ocfs2

[svn-commits at oss.oracle.com]

Author: smushran
Date: 2007-11-29 18:19:04 -0800 (Thu, 29 Nov 2007)
New Revision: 3075

Modified:
   tags/ocfs2-1.2.7/fs/ocfs2/localalloc.c
Log:
ocfs2: Remove expensive local alloc bitmap scan code

This patch is a backport of the one checked in by Jan Kara in mainline.
As per Jan, the patch lowered the CPU usage and increased the write
throughput of dd if=/dev/zero of=/ocfs2/file bs=1M count=500 conv=sync
from 37 MB/s to 45.4 MB/s in local mode...

Authored-by: Jan Kara <jack at suse.cz>
Signed-off-by: mfasheh

Modified: tags/ocfs2-1.2.7/fs/ocfs2/localalloc.c
===================================================================
--- tags/ocfs2-1.2.7/fs/ocfs2/localalloc.c	2007-11-30 02:16:04 UTC (rev 3074)
+++ tags/ocfs2-1.2.7/fs/ocfs2/localalloc.c	2007-11-30 02:19:04 UTC (rev 3075)
@@ -491,17 +491,6 @@
 
 	alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
 
-	if (le32_to_cpu(alloc->id1.bitmap1.i_used) !=
-	    ocfs2_local_alloc_count_bits(alloc)) {
-		ocfs2_error(osb->sb, "local alloc inode %"MLFu64" says it has "
-			    "%u free bits, but a count shows %u",
-			    le64_to_cpu(alloc->i_blkno),
-			    le32_to_cpu(alloc->id1.bitmap1.i_used),
-			    ocfs2_local_alloc_count_bits(alloc));
-		status = -EIO;
-		goto bail;
-	}
-
 	free_bits = le32_to_cpu(alloc->id1.bitmap1.i_total) -
 		le32_to_cpu(alloc->id1.bitmap1.i_used);
 	if (bits_wanted > free_bits) {
@@ -719,9 +708,8 @@
 	void *bitmap;
 	struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc);
 
-	mlog_entry("total = %u, COUNT = %u, used = %u\n",
+	mlog_entry("total = %u, used = %u\n",
 		   le32_to_cpu(alloc->id1.bitmap1.i_total),
-		   ocfs2_local_alloc_count_bits(alloc),
 		   le32_to_cpu(alloc->id1.bitmap1.i_used));
 
 	if (!alloc->id1.bitmap1.i_total) {