Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw

Pull GFS2 updates from Steven Whitehouse:
 "There are a few bug fixes for various, mostly very minor corner cases,
  plus some interesting new features.

  The new features include atomic_open whose main benefit will be the
  reduction in locking overhead in case of combined lookup/create and
  open operations, sorting the log buffer lists by block number to
  improve the efficiency of AIL writeback, and aggressively issuing
  revokes in gfs2_log_flush to reduce overhead when dropping glocks."

* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw:
  GFS2: Reserve journal space for quota change in do_grow
  GFS2: Fix fstrim boundary conditions
  GFS2: fix warning message
  GFS2: aggressively issue revokes in gfs2_log_flush
  GFS2: fix regression in dir_double_exhash
  GFS2: Add atomic_open support
  GFS2: Only do one directory search on create
  GFS2: fix error propagation in init_threads()
  GFS2: Remove no-op wrapper function
  GFS2: Cocci spatch "ptr_ret.spatch"
  GFS2: Eliminate gfs2_rg_lops
  GFS2: Sort buffer lists by inplace block number

1 files changed, 17 insertions, 5 deletions

diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 6c33d7b6e0c4..17c5b5d7dc88 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -16,6 +16,7 @@
 #include <linux/gfs2_ondisk.h>
 #include <linux/bio.h>
 #include <linux/fs.h>
+#include <linux/list_sort.h>
 
 #include "gfs2.h"
 #include "incore.h"
@@ -401,6 +402,20 @@ static void gfs2_check_magic(struct buffer_head *bh)
 	kunmap_atomic(kaddr);
 }
 
+static int blocknr_cmp(void *priv, struct list_head *a, struct list_head *b)
+{
+	struct gfs2_bufdata *bda, *bdb;
+
+	bda = list_entry(a, struct gfs2_bufdata, bd_list);
+	bdb = list_entry(b, struct gfs2_bufdata, bd_list);
+
+	if (bda->bd_bh->b_blocknr < bdb->bd_bh->b_blocknr)
+		return -1;
+	if (bda->bd_bh->b_blocknr > bdb->bd_bh->b_blocknr)
+		return 1;
+	return 0;
+}
+
 static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit,
 				unsigned int total, struct list_head *blist,
 				bool is_databuf)
@@ -413,6 +428,7 @@ static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit,
 	__be64 *ptr;
 
 	gfs2_log_lock(sdp);
+	list_sort(NULL, blist, blocknr_cmp);
 	bd1 = bd2 = list_prepare_entry(bd1, blist, bd_list);
 	while(total) {
 		num = total;
@@ -590,6 +606,7 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
 	struct page *page;
 	unsigned int length;
 
+	gfs2_write_revokes(sdp);
 	if (!sdp->sd_log_num_revoke)
 		return;
 
@@ -836,10 +853,6 @@ const struct gfs2_log_operations gfs2_revoke_lops = {
 	.lo_name = "revoke",
 };
 
-const struct gfs2_log_operations gfs2_rg_lops = {
-	.lo_name = "rg",
-};
-
 const struct gfs2_log_operations gfs2_databuf_lops = {
 	.lo_before_commit = databuf_lo_before_commit,
 	.lo_after_commit = databuf_lo_after_commit,
@@ -851,7 +864,6 @@ const struct gfs2_log_operations gfs2_databuf_lops = {
 const struct gfs2_log_operations *gfs2_log_ops[] = {
 	&gfs2_databuf_lops,
 	&gfs2_buf_lops,
-	&gfs2_rg_lops,
 	&gfs2_revoke_lops,
 	NULL,
 };