D33869.1794494601.diff
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	Index: sys/vm/uma_core.c
	===================================================================
	--- sys/vm/uma_core.c
	+++ sys/vm/uma_core.c
	@@ -5303,6 +5303,33 @@
	}
	}

	+static void
	+zone_match_and_reclaim(uma_zone_t zone, void *arg)
	+{
	+ const char *name = arg;
	+
	+ if (strcmp(zone->uz_name, name) == 0)
	+ uma_zone_reclaim(zone, UMA_RECLAIM_DRAIN_ALL);
	+}
	+
	+static int
	+sysctl_uma_zone_reclaim(SYSCTL_HANDLER_ARGS)
	+{
	+ char name[256] = { [0] = '\0' };
	+ int error;
	+
	+ error = sysctl_handle_string(oidp, name, sizeof(name), req);
	+
	+ if (error != 0 \|\| req->newptr == NULL)
	+ return (error);
	+
	+ zone_foreach(zone_match_and_reclaim, name);
	+
	+ return (0);
	+}
	+SYSCTL_PROC(_vm, OID_AUTO, uma_zone_reclaim, CTLTYPE_STRING \| CTLFLAG_RW, NULL,
	+ 0, sysctl_uma_zone_reclaim, "A", "Reclaim all caches from a zone");
	+
	/* See uma.h */
	int
	uma_zone_exhausted(uma_zone_t zone)