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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>
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1 changed files with 4 additions and 1 deletions
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@ -2116,6 +2116,9 @@ static int ocfs2_prepare_inode_for_write(struct file *file,
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struct dentry *dentry = file->f_path.dentry;
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struct inode *inode = dentry->d_inode;
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loff_t saved_pos = 0, end;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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int full_coherency = !(osb->s_mount_opt &
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OCFS2_MOUNT_COHERENCY_BUFFERED);
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/*
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* We start with a read level meta lock and only jump to an ex
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@ -2204,7 +2207,7 @@ static int ocfs2_prepare_inode_for_write(struct file *file,
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* one node could wind up truncating another
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* nodes writes.
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*/
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if (end > i_size_read(inode)) {
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if (end > i_size_read(inode) && !full_coherency) {
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*direct_io = 0;
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break;
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}
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