linux-ext4 - [PATCH] ext4: Fix for ext4_mb_collect

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Message-ID: <AANLkTinpiynL7Jq3RAbMtiye89wEsLjs07ZkxGWGg_lX@mail.gmail.com>
Date:	Mon, 3 May 2010 10:26:43 -0700
From:	Curt Wohlgemuth <curtw@...gle.com>
To:	ext4 development <linux-ext4@...r.kernel.org>
Subject: [PATCH] ext4: Fix for ext4_mb_collect_stats()

Fix ext4_mb_collect_stats() to use the correct test for s_bal_success; it
should be testing "best-extent.fe_len >= orig-extent.fe_len" , not
"orig-extent.fe_len >= goal-extent.fe_len" .

	Signed-off-by: Curt Wohlgemuth <curtw@...gle.org>
---
diff -uprN orig/fs/ext4/mballoc.c new/fs/ext4/mballoc.c
--- orig/fs/ext4/mballoc.c	2010-05-03 10:11:36.000000000 -0700
+++ new/fs/ext4/mballoc.c	2010-05-03 10:13:31.000000000 -0700
@@ -2981,7 +2981,7 @@ static void ext4_mb_collect_stats(struct
 	if (sbi->s_mb_stats && ac->ac_g_ex.fe_len > 1) {
 		atomic_inc(&sbi->s_bal_reqs);
 		atomic_add(ac->ac_b_ex.fe_len, &sbi->s_bal_allocated);
-		if (ac->ac_o_ex.fe_len >= ac->ac_g_ex.fe_len)
+		if (ac->ac_b_ex.fe_len >= ac->ac_o_ex.fe_len)
 			atomic_inc(&sbi->s_bal_success);
 		atomic_add(ac->ac_found, &sbi->s_bal_ex_scanned);
 		if (ac->ac_g_ex.fe_start == ac->ac_b_ex.fe_start &&
--
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