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| author | Sage Weil <sage@newdream.net> | 2011-07-26 20:26:41 +0200 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2011-07-26 20:26:41 +0200 |
| commit | e77dc3e9c061e50c67e2e1a604d0a370f40db298 (patch) | |
| tree | 8ed497994e3e1b9949c3d6907ed901ff502b1f5e /fs | |
| parent | ceph: fix snap writeback when racing with writes (diff) | |
| download | linux-e77dc3e9c061e50c67e2e1a604d0a370f40db298.tar.xz linux-e77dc3e9c061e50c67e2e1a604d0a370f40db298.zip | |
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>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ceph/snap.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c index ac030c9d9959..e26437191333 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; |