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Code Issues Releases Wiki Activity

Pulling rt15970 into HEAD.

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This commit is contained in:
Shane Kerr 2006-04-26 12:12:45 +00:00
parent 602784c4ce
commit 1e844d04a7
1 changed files with 16 additions and 1 deletions
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17
lib/dns/acache.c
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@ -14,7 +14,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: acache.c,v 1.12 2006/04/26 12:03:08 shane Exp $ */
/* $Id: acache.c,v 1.13 2006/04/26 12:12:45 shane Exp $ */
#include <config.h>
@ -1247,6 +1247,21 @@ dns_acache_createentry(dns_acache_t *acache, dns_db_t *origdb,
REQUIRE(entryp != NULL && *entryp == NULL);
REQUIRE(origdb != NULL);
/*
* Should we exceed our memory limit for some reason (for
* example, if the cleaner does not run aggressively enough),
* then we will not create additional entries.
*
* XXX: It might be better to lock the acache->cleaner->lock,
* but locking may be an expensive bottleneck. If we misread
* the value, we will occasionally refuse to create a few
* cache entries, or create a few that we should not. I do not
* expect this to happen often, and it will not have very bad
* effects when it does. So no lock for now.
*/
if (acache->cleaner.overmem)
return (ISC_R_NORESOURCES);
newentry = isc_mem_get(acache->mctx, sizeof(*newentry));
if (newentry == NULL)
return (ISC_R_NOMEMORY);