long cl_dirty_transit; /* dirty synchronous */
long cl_avail_grant; /* bytes of credit for ost */
long cl_lost_grant; /* lost credits (trunc) */
- cfs_list_t cl_cache_waiters; /* waiting for cache/grant */
- cfs_time_t cl_next_shrink_grant; /* jiffies */
- cfs_list_t cl_grant_shrink_list; /* Timeout event list */
- int cl_grant_shrink_interval; /* seconds */
+
+ /* since we allocate grant by blocks, we don't know how many grant will
+ * be used to add a page into cache. As a solution, we reserve maximum
+ * grant before trying to dirty a page and unreserve the rest.
+ * See osc_{reserve|unreserve}_grant for details. */
+ long cl_reserved_grant;
+ cfs_list_t cl_cache_waiters; /* waiting for cache/grant */
+ cfs_time_t cl_next_shrink_grant; /* jiffies */
+ cfs_list_t cl_grant_shrink_list; /* Timeout event list */
+ int cl_grant_shrink_interval; /* seconds */
+
+ /* A chunk is an optimal size used by osc_extent to determine
+ * the extent size. A chunk is max(CFS_PAGE_SIZE, OST block size) */
+ int cl_chunkbits;
+ int cl_chunk;
+ int cl_extent_tax; /* extent overhead, by bytes */
/* keep track of objects that have lois that contain pages which
* have been queued for async brw. this lock also protects the
*
* NB by Jinshan: though field names are still _loi_, but actually
* osc_object{}s are in the list.
- */
+ */
client_obd_lock_t cl_loi_list_lock;
cfs_list_t cl_loi_ready_list;
cfs_list_t cl_loi_hp_ready_list;
int cl_r_in_flight;
int cl_w_in_flight;
/* just a sum of the loi/lop pending numbers to be exported by /proc */
- int cl_pending_w_pages;
- int cl_pending_r_pages;
- int cl_max_pages_per_rpc;
+ cfs_atomic_t cl_pending_w_pages;
+ cfs_atomic_t cl_pending_r_pages;
+ int cl_max_pages_per_rpc;
int cl_max_rpcs_in_flight;
struct obd_histogram cl_read_rpc_hist;
struct obd_histogram cl_write_rpc_hist;