[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1431402528-24156-2-git-send-email-jaegeuk@kernel.org>
Date: Mon, 11 May 2015 20:48:47 -0700
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 2/3] f2fs: do not issue next dnode discard redundantly
We have a discard map, so that we can avoid redundant discard issues.
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
fs/f2fs/segment.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 2c40ce1..342e0f7 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -486,7 +486,20 @@ static int f2fs_issue_discard(struct f2fs_sb_info *sbi,
void discard_next_dnode(struct f2fs_sb_info *sbi, block_t blkaddr)
{
- if (f2fs_issue_discard(sbi, blkaddr, 1)) {
+ int err = -ENOTSUPP;
+
+ if (test_opt(sbi, DISCARD)) {
+ struct seg_entry *se = get_seg_entry(sbi,
+ GET_SEGNO(sbi, blkaddr));
+ unsigned int offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
+
+ if (f2fs_test_bit(offset, se->discard_map))
+ return;
+
+ err = f2fs_issue_discard(sbi, blkaddr, 1);
+ }
+
+ if (err) {
struct page *page = grab_meta_page(sbi, blkaddr);
/* zero-filled page */
set_page_dirty(page);
--
2.1.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists