GFS2: Make writeback more responsive to system conditions
This patch adds writeback_control to writing back the AIL
list. This means that we can then take advantage of the
information we get in ->write_inode() in order to set off
some pre-emptive writeback.
In addition, the AIL code is cleaned up a bit to make it
a bit simpler to understand.
There is still more which can usefully be done in this area,
but this is a good start at least.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index cb8776f..eed4b68 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -649,7 +649,7 @@
/* Note: Unsafe to dereference ip as we don't hold right refs/locks */
if (ip)
- inode = gfs2_ilookup(sdp->sd_vfs, no_addr);
+ inode = gfs2_ilookup(sdp->sd_vfs, no_addr, 1);
else
inode = gfs2_lookup_by_inum(sdp, no_addr, NULL, GFS2_BLKST_UNLINKED);
if (inode && !IS_ERR(inode)) {