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authorSage Weil <sage@newdream.net>2011-07-26 18:26:41 (GMT)
committerSage Weil <sage@newdream.net>2011-07-26 18:26:41 (GMT)
commite77dc3e9c061e50c67e2e1a604d0a370f40db298 (patch)
tree8ed497994e3e1b9949c3d6907ed901ff502b1f5e
parentaf0ed569d7019f1b49e9e51e77b47092e656b00e (diff)
downloadlinux-e77dc3e9c061e50c67e2e1a604d0a370f40db298.tar.xz
ceph: only queue capsnap if caps are dirty
We used to go into this branch if i_wrbuffer_ref_head was non-zero. This was an ancient check from before we were careful about dealing with all kinds of caps (and not just dirty pages). It is cleaner to only queue a capsnap if there is an actual dirty cap. If we are racing with... something...we will end up here with ci->i_wrbuffer_refs but no dirty caps. Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
-rw-r--r--fs/ceph/snap.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c
index ac030c9..e264371 100644
--- a/fs/ceph/snap.c
+++ b/fs/ceph/snap.c
@@ -465,9 +465,8 @@ void ceph_queue_cap_snap(struct ceph_inode_info *ci)
cap_snap. lucky us. */
dout("queue_cap_snap %p already pending\n", inode);
kfree(capsnap);
- } else if (ci->i_wrbuffer_ref_head ||
- (dirty & (CEPH_CAP_AUTH_EXCL|CEPH_CAP_XATTR_EXCL|
- CEPH_CAP_FILE_EXCL|CEPH_CAP_FILE_WR))) {
+ } else if (dirty & (CEPH_CAP_AUTH_EXCL|CEPH_CAP_XATTR_EXCL|
+ CEPH_CAP_FILE_EXCL|CEPH_CAP_FILE_WR)) {
struct ceph_snap_context *snapc = ci->i_head_snapc;
/*
@@ -480,7 +479,6 @@ void ceph_queue_cap_snap(struct ceph_inode_info *ci)
dout("queue_cap_snap %p cap_snap %p queuing under %p %s\n",
inode, capsnap, snapc, ceph_cap_string(dirty));
ihold(inode);
- BUG_ON(dirty == 0);
atomic_set(&capsnap->nref, 1);
capsnap->ci = ci;