linux-ext4 - [RFC][PATCH 4/4] ext4_locality

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Message-Id: <20070426211412sho@rifu.tnes.nec.co.jp>
Date:	Thu, 26 Apr 2007 21:14:11 +0900
From:	"Takashi Sato" <sho@...s.nec.co.jp>
To:	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [RFC][PATCH 4/4] ext4_locality_group bug fix

Move lg_list to s_locality_dirty and mark lg as dirty
if nr_to_write(total page count which has not written in disk yet)
is 0 or less and lg_io is not empty in ext4_lg_sync_single_group(). 
This makes sure that inode is written to disk.

Signed-off-by: Takashi Sato <sho@...s.nec.co.jp>
---
diff -Nrup -X linux-2.6.19-rc6-lg/Documentation/dontdiff linux-2.6.19-rc6-lg/fs/ext4/lg.c linux-2.6.19-rc6-full/fs/ext4/lg.c
--- linux-2.6.19-rc6-lg/fs/ext4/lg.c	2007-04-26 19:55:37.000000000 +0900
+++ linux-2.6.19-rc6-full/fs/ext4/lg.c	2007-04-26 19:17:59.000000000 +0900
@@ -389,6 +389,10 @@ int ext4_lg_sync_single_group(struct sup
 		cond_resched();
 		spin_lock(&inode_lock);
 		if (wbc->nr_to_write <= 0) {
+			if (!list_empty(&lg->lg_io)) {
+				set_bit(EXT4_LG_DIRTY, &lg->lg_flags);
+				list_move(&lg->lg_list, &sbi->s_locality_dirty);
+			}
 			rc = EXT4_STOP_WRITEBACK;
 			code = 6;
 			break;
-
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