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| author | Wang Shilong <wangsl.fnst@cn.fujitsu.com> | 2014-07-17 11:44:09 +0800 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-09-17 13:37:36 -0700 |
| commit | f79707b092caff665a8a77e8e31fe4ab18b4d109 (patch) | |
| tree | a99824b3fa7f9151f0b46a613b3a882c47856ab2 /fs/btrfs/inode.c | |
| parent | d447d0da44cd7d396277d1d8f46b418c721fbc02 (diff) | |
| download | op-kernel-dev-f79707b092caff665a8a77e8e31fe4ab18b4d109.zip op-kernel-dev-f79707b092caff665a8a77e8e31fe4ab18b4d109.tar.gz | |
Btrfs: fix wrong skipping compression for an inode
If a file's compression ratios is bad, we will set NOCOMPRESS
flag for it, and it will skip compression for that inode next time.
However, if we remount fs to COMPRESS_FORCE, it still should try
if we could compress pages for that inode, this patch fix wrong
check for this problem.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/inode.c')
| -rw-r--r-- | fs/btrfs/inode.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 177508a..48a2886 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -348,6 +348,23 @@ static noinline int add_async_extent(struct async_cow *cow, return 0; } +static inline int inode_need_compress(struct inode *inode) +{ + struct btrfs_root *root = BTRFS_I(inode)->root; + + /* force compress */ + if (btrfs_test_opt(root, FORCE_COMPRESS)) + return 1; + /* bad compression ratios */ + if (BTRFS_I(inode)->flags & BTRFS_INODE_NOCOMPRESS) + return 0; + if (btrfs_test_opt(root, COMPRESS) || + BTRFS_I(inode)->flags & BTRFS_INODE_COMPRESS || + BTRFS_I(inode)->force_compress) + return 1; + return 0; +} + /* * we create compressed extents in two phases. The first * phase compresses a range of pages that have already been @@ -444,10 +461,7 @@ again: * inode has not been flagged as nocompress. This flag can * change at any time if we discover bad compression ratios. */ - if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NOCOMPRESS) && - (btrfs_test_opt(root, COMPRESS) || - (BTRFS_I(inode)->force_compress) || - (BTRFS_I(inode)->flags & BTRFS_INODE_COMPRESS))) { + if (inode_need_compress(inode)) { WARN_ON(pages); pages = kzalloc(sizeof(struct page *) * nr_pages, GFP_NOFS); if (!pages) { @@ -1094,7 +1108,8 @@ static int cow_file_range_async(struct inode *inode, struct page *locked_page, async_cow->locked_page = locked_page; async_cow->start = start; - if (BTRFS_I(inode)->flags & BTRFS_INODE_NOCOMPRESS) + if (BTRFS_I(inode)->flags & BTRFS_INODE_NOCOMPRESS && + !btrfs_test_opt(root, FORCE_COMPRESS)) cur_end = end; else cur_end = min(end, start + 512 * 1024 - 1); |
