Ceph needs to flush dirty page in the order in which in which snap
context they belong to. Dirty pages belong to older snap context
should be flushed earlier. if writepage_nounlock() can not flush a
page, it should redirty the page.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
dout("writepage %p page %p snapc %p not writeable - noop\n",
inode, page, snapc);
/* we should only noop if called by kswapd */
- WARN_ON((current->flags & PF_MEMALLOC) == 0);
+ WARN_ON(!(current->flags & PF_MEMALLOC));
ceph_put_snap_context(oldest);
+ redirty_page_for_writepage(wbc, page);
goto out;
}
ceph_put_snap_context(oldest);