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Diffstat (limited to 'libglusterfs/src/glusterfs/mem-pool.h')
-rw-r--r--libglusterfs/src/glusterfs/mem-pool.h28
1 files changed, 15 insertions, 13 deletions
diff --git a/libglusterfs/src/glusterfs/mem-pool.h b/libglusterfs/src/glusterfs/mem-pool.h
index be0a26d..97bf76c 100644
--- a/libglusterfs/src/glusterfs/mem-pool.h
+++ b/libglusterfs/src/glusterfs/mem-pool.h
@@ -245,24 +245,26 @@ typedef struct per_thread_pool {
} per_thread_pool_t;
typedef struct per_thread_pool_list {
- /*
- * These first two members are protected by the global pool lock. When
- * a thread first tries to use any pool, we create one of these. We
- * link it into the global list using thr_list so the pool-sweeper
- * thread can find it, and use pthread_setspecific so this thread can
- * find it. When the per-thread destructor runs, we "poison" the pool
- * list to prevent further allocations. This also signals to the
- * pool-sweeper thread that the list should be detached and freed after
- * the next time it's swept.
- */
+ /* thr_list is used to place the TLS pool_list into the active global list
+ * (pool_threads) or the inactive global list (pool_free_threads). It's
+ * protected by the global pool_lock. */
struct list_head thr_list;
- unsigned int poison;
+
+ /* This lock is used to update poison and the hot/cold lists of members
+ * of 'pools' array. */
+ pthread_spinlock_t lock;
+
+ /* This field is used to mark a pool_list as not being owned by any thread.
+ * This means that the sweeper thread won't be cleaning objects stored in
+ * its pools. mem_put() uses it to decide if the object being released is
+ * placed into its original pool_list or directly destroyed. */
+ bool poison;
+
/*
* There's really more than one pool, but the actual number is hidden
* in the implementation code so we just make it a single-element array
* here.
*/
- pthread_spinlock_t lock;
per_thread_pool_t pools[1];
} per_thread_pool_list_t;
@@ -307,7 +309,7 @@ void
mem_pool_destroy(struct mem_pool *pool);
void
-mem_pool_thread_destructor(void);
+mem_pool_thread_destructor(per_thread_pool_list_t *pool_list);
void
gf_mem_acct_enable_set(void *ctx);