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ocfs2: do not fallback to buffer I/O write if appending

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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>
This commit is contained in:
Joseph Qi 2015-02-16 16:00:06 -08:00 committed by Linus Torvalds
parent 49255dce65
commit d943d59dd3
1 changed files with 4 additions and 1 deletions
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5
fs/ocfs2/file.c
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@ -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;
}