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2330. [bug] Remove potential race condition when handling

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over memory events. [RT #17572]

                        WARNING: API CHANGE: over memory callback
                        function now needs to call isc_mem_waterack().
                        See <isc/mem.h> for details.
This commit is contained in:
Mark Andrews
2008-02-07 02:41:26 +00:00
parent e934a311cb
commit 9a7d202077
7 changed files with 88 additions and 24 deletions
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9
lib/dns/cache.c
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@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: cache.c,v 1.76 2007/10/19 17:15:53 explorer Exp $ */
/* $Id: cache.c,v 1.77 2008/02/07 02:41:26 marka Exp $ */
/*! \file */
@@ -708,8 +708,11 @@ water(void *arg, int mark) {
LOCK(&cache->cleaner.lock);
dns_db_overmem(cache->db, overmem);
cache->cleaner.overmem = overmem;
if (overmem != cache->cleaner.overmem) {
dns_db_overmem(cache->db, overmem);
cache->cleaner.overmem = overmem;
isc_mem_waterack(cache->mctx, mark);
}
UNLOCK(&cache->cleaner.lock);
}