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| author | Joseph Qi <joseph.qi@huawei.com> | 2015-02-16 16:00:06 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-16 17:56:05 -0800 |
| commit | d943d59dd32d33cd8a44a2f9caf373ede11200da (patch) | |
| tree | 9d631612c7fdc222c4d81e75cffca36acab72c29 | |
| parent | 49255dce65dba3d06a0f642fee788f0a50d48d5b (diff) | |
| download | linux-exynos-d943d59dd32d33cd8a44a2f9caf373ede11200da.tar.gz linux-exynos-d943d59dd32d33cd8a44a2f9caf373ede11200da.tar.bz2 linux-exynos-d943d59dd32d33cd8a44a2f9caf373ede11200da.zip | |
ocfs2: do not fallback to buffer I/O write if appending
Now we can do direct io and do not fallback to buffered IO any more in
case of append O_DIRECT write.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Weiwei Wang <wangww631@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Xuejiufei <xuejiufei@huawei.com>
Cc: alex chen <alex.chen@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/ocfs2/file.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 2fce3c40ad27..1055a2ece738 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -2116,6 +2116,9 @@ static int ocfs2_prepare_inode_for_write(struct file *file, struct dentry *dentry = file->f_path.dentry; struct inode *inode = dentry->d_inode; loff_t saved_pos = 0, end; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + int full_coherency = !(osb->s_mount_opt & + OCFS2_MOUNT_COHERENCY_BUFFERED); /* * We start with a read level meta lock and only jump to an ex @@ -2204,7 +2207,7 @@ static int ocfs2_prepare_inode_for_write(struct file *file, * one node could wind up truncating another * nodes writes. */ - if (end > i_size_read(inode)) { + if (end > i_size_read(inode) && !full_coherency) { *direct_io = 0; break; } |