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ocfs2: Remove data locks

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The meta lock now covers both meta data and data, so this just removes the
now-redundant data lock.

Combining locks saves us a round of lock mastery per inode and one less lock
to ping between nodes during read/write.

We don't lose much - since meta locks were always held before a data lock
(and at the same level) ordered writeout mode (the default) ensured that
flushing for the meta data lock also pushed out data anyways.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh
2007-10-18 15:23:46 -07:00
parent f1f540688e
commit c934a92d05
9 changed files with 22 additions and 214 deletions
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9
fs/ocfs2/mmap.c
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@@ -181,17 +181,8 @@ static int ocfs2_page_mkwrite(struct vm_area_struct *vma, struct page *page)
*/
down_write(&OCFS2_I(inode)->ip_alloc_sem);
ret = ocfs2_data_lock(inode, 1);
if (ret < 0) {
mlog_errno(ret);
goto out_meta_unlock;
}
ret = __ocfs2_page_mkwrite(inode, di_bh, page);
ocfs2_data_unlock(inode, 1);
out_meta_unlock:
up_write(&OCFS2_I(inode)->ip_alloc_sem);
brelse(di_bh);