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From: Tetsuhiro Kohada <kohada.t2@gmail.com>
To: kohada.t2@gmail.com
Cc: kohada.tetsuhiro@dc.mitsubishielectric.co.jp,
	mori.takahiro@ab.mitsubishielectric.co.jp,
	motai.hirotaka@aj.mitsubishielectric.co.jp,
	Namjae Jeon <namjae.jeon@samsung.com>,
	Sungjong Seo <sj1557.seo@samsung.com>,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/3] exfat: optimize exfat_zeroed_cluster()
Date: Thu,  4 Jun 2020 17:44:43 +0900	[thread overview]
Message-ID: <20200604084445.19205-2-kohada.t2@gmail.com> (raw)
In-Reply-To: <20200604084445.19205-1-kohada.t2@gmail.com>

Replace part of exfat_zeroed_cluster() with exfat_update_bhs().
And remove exfat_sync_bhs().

Signed-off-by: Tetsuhiro Kohada <kohada.t2@gmail.com>
---
 fs/exfat/fatent.c | 54 ++++++++++-------------------------------------
 1 file changed, 11 insertions(+), 43 deletions(-)

diff --git a/fs/exfat/fatent.c b/fs/exfat/fatent.c
index 267e5e09eb13..5d11bc2f1b68 100644
--- a/fs/exfat/fatent.c
+++ b/fs/exfat/fatent.c
@@ -230,21 +230,6 @@ int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain,
 	return 0;
 }
 
-static inline int exfat_sync_bhs(struct buffer_head **bhs, int nr_bhs)
-{
-	int i, err = 0;
-
-	for (i = 0; i < nr_bhs; i++)
-		write_dirty_buffer(bhs[i], 0);
-
-	for (i = 0; i < nr_bhs; i++) {
-		wait_on_buffer(bhs[i]);
-		if (!err && !buffer_uptodate(bhs[i]))
-			err = -EIO;
-	}
-	return err;
-}
-
 int exfat_zeroed_cluster(struct inode *dir, unsigned int clu)
 {
 	struct super_block *sb = dir->i_sb;
@@ -266,41 +251,24 @@ int exfat_zeroed_cluster(struct inode *dir, unsigned int clu)
 	}
 
 	/* Zeroing the unused blocks on this cluster */
-	n = 0;
 	while (blknr < last_blknr) {
-		bhs[n] = sb_getblk(sb, blknr);
-		if (!bhs[n]) {
-			err = -ENOMEM;
-			goto release_bhs;
-		}
-		memset(bhs[n]->b_data, 0, sb->s_blocksize);
-		exfat_update_bh(sb, bhs[n], 0);
-
-		n++;
-		blknr++;
-
-		if (n == nr_bhs) {
-			if (IS_DIRSYNC(dir)) {
-				err = exfat_sync_bhs(bhs, n);
-				if (err)
-					goto release_bhs;
+		for (n = 0; n < nr_bhs && blknr < last_blknr; n++, blknr++) {
+			bhs[n] = sb_getblk(sb, blknr);
+			if (!bhs[n]) {
+				err = -ENOMEM;
+				goto release_bhs;
 			}
-
-			for (i = 0; i < n; i++)
-				brelse(bhs[i]);
-			n = 0;
+			memset(bhs[n]->b_data, 0, sb->s_blocksize);
 		}
-	}
 
-	if (IS_DIRSYNC(dir)) {
-		err = exfat_sync_bhs(bhs, n);
+		set_bit(EXFAT_SB_DIRTY, &sbi->s_state);
+		err = exfat_update_bhs(bhs, n, IS_DIRSYNC(dir));
 		if (err)
 			goto release_bhs;
-	}
-
-	for (i = 0; i < n; i++)
-		brelse(bhs[i]);
 
+		for (i = 0; i < n; i++)
+			brelse(bhs[i]);
+	}
 	return 0;
 
 release_bhs:
-- 
2.25.1


  reply	other threads:[~2020-06-04  8:45 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-04  8:44 [PATCH 1/3] exfat: add error check when updating dir-entries Tetsuhiro Kohada
2020-06-04  8:44 ` Tetsuhiro Kohada [this message]
2020-06-04  8:44 ` [PATCH 3/3] exfat: set EXFAT_SB_DIRTY and VOL_DIRTY at the same timing Tetsuhiro Kohada
2020-06-05  7:32   ` Namjae Jeon
2020-06-06  9:22     ` Tetsuhiro Kohada
2020-06-07  0:26       ` Namjae Jeon
2020-06-08  5:02         ` Kohada.Tetsuhiro
2020-06-09  2:02           ` Namjae Jeon
2020-06-07  0:33 ` [PATCH 1/3] exfat: add error check when updating dir-entries Namjae Jeon
2020-06-09  8:10   ` Tetsuhiro Kohada

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