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| author | Al Viro <viro@zeniv.linux.org.uk> | 2016-01-22 19:47:47 -0500 |
|---|---|---|
| committer | Mike Marshall <hubcap@omnibond.com> | 2016-01-23 13:03:12 -0500 |
| commit | ed42fe059389daa35a2aa10ec832e9f8d0a9e59e (patch) | |
| tree | 778e6ebb516e7a6301305b077e31ee40d9fe96c2 /fs/orangefs/orangefs-cache.c | |
| parent | fee25ce12504ff071254fd213055c3f1d3004622 (diff) | |
| download | linux-ed42fe059389daa35a2aa10ec832e9f8d0a9e59e.tar.gz linux-ed42fe059389daa35a2aa10ec832e9f8d0a9e59e.tar.bz2 linux-ed42fe059389daa35a2aa10ec832e9f8d0a9e59e.zip | |
orangefs: hopefully saner op refcounting and locking
* create with refcount 1
* make op_release() decrement and free if zero (i.e. old put_op()
has become that).
* mark when submitter has given up waiting; from that point nobody
else can move between the lists, change state, etc.
* have daemon read/write_iter grab a reference when picking op
and *always* give it up in the end
* don't put into hash until we know it's been successfully passed to
daemon
* move op->lock _lower_ than htab_in_progress_lock (and make sure
to take it in purge_inprogress_ops())
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Diffstat (limited to 'fs/orangefs/orangefs-cache.c')
| -rw-r--r-- | fs/orangefs/orangefs-cache.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/orangefs/orangefs-cache.c b/fs/orangefs/orangefs-cache.c index dd4335ff8c10..adc3ab013fdf 100644 --- a/fs/orangefs/orangefs-cache.c +++ b/fs/orangefs/orangefs-cache.c @@ -120,7 +120,7 @@ struct orangefs_kernel_op_s *op_alloc(__s32 type) init_waitqueue_head(&new_op->waitq); init_waitqueue_head(&new_op->io_completion_waitq); - atomic_set(&new_op->ref_count, 0); + atomic_set(&new_op->ref_count, 1); orangefs_op_initialize(new_op); @@ -149,14 +149,13 @@ struct orangefs_kernel_op_s *op_alloc(__s32 type) return new_op; } -void op_release(struct orangefs_kernel_op_s *orangefs_op) +void __op_release(struct orangefs_kernel_op_s *orangefs_op) { if (orangefs_op) { gossip_debug(GOSSIP_CACHE_DEBUG, "Releasing OP (%p: %llu)\n", orangefs_op, llu(orangefs_op->tag)); - orangefs_op_initialize(orangefs_op); kmem_cache_free(op_cache, orangefs_op); } else { gossip_err("NULL pointer in op_release\n"); |