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3053. [bug] Under a sustained high query load with a finite

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max-cache-size, it was possible for cache memory
			to be exhausted and not recovered. [RT #23371]
This commit is contained in:
Evan Hunt
2011-03-03 04:42:25 +00:00
parent 7da206e578
commit 70c7f4fb4f
7 changed files with 142 additions and 56 deletions
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7
lib/isc/heap.c
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@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: heap.c,v 1.39 2010/02/04 23:49:13 tbox Exp $ */
/* $Id: heap.c,v 1.40 2011/03/03 04:42:25 each Exp $ */
/*! \file
* Heap implementation of priority queues adapted from the following:
@@ -86,8 +86,9 @@ isc_heap_create(isc_mem_t *mctx, isc_heapcompare_t compare,
if (heap == NULL)
return (ISC_R_NOMEMORY);
heap->magic = HEAP_MAGIC;
heap->mctx = mctx;
heap->size = 0;
heap->mctx = NULL;
isc_mem_attach(mctx, &heap->mctx);
if (size_increment == 0)
heap->size_increment = SIZE_INCREMENT;
else
@@ -114,7 +115,7 @@ isc_heap_destroy(isc_heap_t **heapp) {
isc_mem_put(heap->mctx, heap->array,
heap->size * sizeof(void *));
heap->magic = 0;
isc_mem_put(heap->mctx, heap, sizeof(*heap));
isc_mem_putanddetach(&heap->mctx, heap, sizeof(*heap));
*heapp = NULL;
}