mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

ceph: redirty page when writepage_nounlock() skips unwritable page 

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>
This commit is contained in:
Yan, Zheng 2017-05-23 17:18:53 +08:00 committed by Ilya Dryomov
parent f2b0c45f09
commit fa71fefb30
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/ceph/addr.c
View File

@ -551,8 +551,9 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc)
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);