From: Jaegeuk Kim <jaegeuk@kernel.org>
To: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Subject: [f2fs-dev] [PATCH] f2fs: stop iterating f2fs_map_block if hole exists
Date: Tue, 3 Oct 2023 15:52:08 -0700 [thread overview]
Message-ID: <20231003225208.1936359-1-jaegeuk@kernel.org> (raw)
Let's avoid unnecessary f2fs_map_block calls to load extents.
# f2fs_io fadvise willneed 0 4096 /data/local/tmp/test
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 386, start blkaddr = 0x34ac00, len = 0x1400, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 5506, start blkaddr = 0x34c200, len = 0x1000, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 9602, start blkaddr = 0x34d600, len = 0x1200, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 14210, start blkaddr = 0x34ec00, len = 0x400, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 15235, start blkaddr = 0x34f401, len = 0xbff, flags = 2,
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 18306, start blkaddr = 0x350200, len = 0x1200, flags = 2
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 22915, start blkaddr = 0x351601, len = 0xa7d, flags = 2
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25600, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25601, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 25602, start blkaddr = 0x351601, len = 0x0, flags = 0
...
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1037188, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1038206, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 1039224, start blkaddr = 0x351601, len = 0x0, flags = 0
f2fs_map_blocks: dev = (254,51), ino = 85845, file offset = 2075548, start blkaddr = 0x351601, len = 0x0, flags = 0
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
fs/f2fs/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 161826c6e200..2403fd1de5a0 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3270,7 +3270,7 @@ int f2fs_precache_extents(struct inode *inode)
f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRECACHE);
f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
- if (err)
+ if (err || !map.m_len)
return err;
map.m_lblk = m_next_extent;
--
2.42.0.582.g8ccd20d70d-goog
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next reply other threads:[~2023-10-03 22:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-03 22:52 Jaegeuk Kim [this message]
2023-10-07 7:40 ` [f2fs-dev] [PATCH] f2fs: stop iterating f2fs_map_block if hole exists Chao Yu
2023-10-09 17:56 ` Jaegeuk Kim
2023-10-23 15:30 ` patchwork-bot+f2fs
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