From mboxrd@z Thu Jan  1 00:00:00 1970
From: wcheng@sourceware.org <wcheng@sourceware.org>
Date: 17 Nov 2006 16:15:32 -0000
Subject: [Cluster-devel] cluster/gfs-kernel/src/gfs ops_file.c
Message-ID: <20061117161532.17462.qmail@sourceware.org>
List-Id: <cluster-devel.redhat.com>
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CVSROOT:	/cvs/cluster
Module name:	cluster
Changes by:	wcheng at sourceware.org	2006-11-17 16:15:32

Modified files:
	gfs-kernel/src/gfs: ops_file.c 

Log message:
	Bugzilla 214274: Oops... only directIO has this issue - buffer IO should be
	fine. Revert buffer io changes.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/ops_file.c.diff?cvsroot=cluster&r1=1.29&r2=1.30

--- cluster/gfs-kernel/src/gfs/ops_file.c	2006/11/17 05:00:57	1.29
+++ cluster/gfs-kernel/src/gfs/ops_file.c	2006/11/17 16:15:31	1.30
@@ -700,15 +700,18 @@
 	if (alloc_required) {
 		set_bit(GFF_DID_DIRECT_ALLOC, &fp->f_flags);
 
+		/* for asynchronous IO, the buffer can not be splitted */
+		if (iocb) {
+			count = do_write_direct_alloc(file, buf, size, offset, iocb);
+			goto out_iocb_write;
+		}
+
 		/* split large writes into smaller atomic transactions */
 		while (size) {
-			if (iocb)
+			s = gfs_tune_get(sdp, gt_max_atomic_write);
+			if (s > size)
 				s = size;
-			else {
-				s = gfs_tune_get(sdp, gt_max_atomic_write);
-				if (s > size) 
-					s = size;
-			}
+
 			error = do_write_direct_alloc(file, buf, s, offset, iocb);
 			if (error < 0)
 				goto out_gunlock;
@@ -740,6 +743,7 @@
 		gfs_glock_dq_uninit(&t_gh);
 	}
 
+out_iocb_write:
 	error = 0;
 
 out_gunlock:
@@ -977,13 +981,9 @@
 
 	/* split large writes into smaller atomic transactions */
 	while (size) {
-		if (iocb)
+		s = gfs_tune_get(sdp, gt_max_atomic_write);
+		if (s > size)
 			s = size;
-		else {
-			s = gfs_tune_get(sdp, gt_max_atomic_write);
-			if (s > size)
-				s = size;
-		}
 
 		error = do_do_write_buf(file, buf, s, offset, iocb);
 		if (error < 0)