staging: lustre: statahead: use dcache-like interface for sa entry (e554fbff) · Commits · 戴 / test

Rename ll_sa_entry to sa_entry, and manage sa_entry cache with dcache-like interfaces. sa_entry is not needed to be refcounted, because only scanner can free it, so after it's put in stat list, statahead thread shouldn't access it any longer. ll_statahead_interpret() doesn't need to take sai refcount, because statahead thread will wait for all inflight RPC to finish. Signed-off-by:

Lai Siyao <lai.siyao@intel.com> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3270 Reviewed-on: http://review.whamcloud.com/9664 Reviewed-by:

James Simmons <uja.ornl@gmail.com> Reviewed-by:

Fan Yong <fan.yong@intel.com> Reviewed-by:

Oleg Drokin <oleg.drokin@intel.com> Signed-off-by:

James Simmons <jsimmons@infradead.org> Signed-off-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/include/obd.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -812,7 +812,7 @@ struct md_enqueue_info {
		struct inode *mi_dir;
		int (mi_cb)(struct ptlrpc_request req,
		struct md_enqueue_info *minfo, int rc);
		__u64 mi_cbdata;
		void *mi_cbdata;
		};

		struct obd_ops {

drivers/staging/lustre/lustre/llite/llite_internal.h

+6 −4

Original line number	Diff line number	Diff line
		@@ -1131,10 +1131,12 @@ struct ll_statahead_info {
		wait_queue_head_t sai_waitq; /* stat-ahead wait queue */
		struct ptlrpc_thread sai_thread; /* stat-ahead thread */
		struct ptlrpc_thread sai_agl_thread; /* AGL thread */
		struct list_head sai_entries; /* entry list */
		struct list_head sai_entries_received; /* entries returned */
		struct list_head sai_entries_stated; /* entries stated */
		struct list_head sai_entries_agl; /* AGL entries to be sent */
		struct list_head sai_interim_entries; /* entries which got async
		* stat reply, but not
		* instantiated
		*/
		struct list_head sai_entries; /* completed entries */
		struct list_head sai_agls; /* AGLs to be sent */
		struct list_head sai_cache[LL_SA_CACHE_SIZE];
		spinlock_t sai_cache_lock[LL_SA_CACHE_SIZE];
		atomic_t sai_cache_count; /* entry count in cache */

drivers/staging/lustre/lustre/llite/statahead.c

+200 −261

File changed.

Preview size limit exceeded, changes collapsed.

Admin message