diff options
| author |   Jeff Layton <jlayton@poochiereds.net> | 2015-11-29 08:46:14 -0500 |
|---|---|---|
| committer |   J. Bruce Fields <bfields@redhat.com> | 2015-12-16 11:49:58 -0500 |
| commit | be20aa00c67102aaa54599518c086a2338b19f4c (patch) | |
| tree | f44c188279fe553b8b47f6398b7782e26ec60bbb /fs/nfsd | |
| parent | Linux 4.4-rc1 (diff) | |
| download | linux-dev-be20aa00c67102aaa54599518c086a2338b19f4c.tar.xz linux-dev-be20aa00c67102aaa54599518c086a2338b19f4c.zip | |
nfsd: don't hold ls_mutex across a layout recall
We do need to serialize layout stateid morphing operations, but we
currently hold the ls_mutex across a layout recall which is pretty
ugly. It's also unnecessary -- once we've bumped the seqid and
copied it, we don't need to serialize the rest of the CB_LAYOUTRECALL
vs. anything else. Just drop the mutex once the copy is done.
This was causing a "workqueue leaked lock or atomic" warning and an
occasional deadlock.
There's more work to be done here but this fixes the immediate
regression.
Fixes: cc8a55320b5f "nfsd: serialize layout stateid morphing operations"
Cc: stable@vger.kernel.org
Reported-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs4layouts.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c index 9ffef06b30d5..c9d6c715c0fb 100644 --- a/fs/nfsd/nfs4layouts.c +++ b/fs/nfsd/nfs4layouts.c @@ -616,6 +616,7 @@ nfsd4_cb_layout_prepare(struct nfsd4_callback *cb) mutex_lock(&ls->ls_mutex); nfs4_inc_and_copy_stateid(&ls->ls_recall_sid, &ls->ls_stid); + mutex_unlock(&ls->ls_mutex); } static int @@ -659,7 +660,6 @@ nfsd4_cb_layout_release(struct nfsd4_callback *cb) trace_layout_recall_release(&ls->ls_stid.sc_stateid); - mutex_unlock(&ls->ls_mutex); nfsd4_return_all_layouts(ls, &reaplist); nfsd4_free_layouts(&reaplist); nfs4_put_stid(&ls->ls_stid); |