Configure UMA warnings for the following zones:

- unp_zone: kern.ipc.maxsockets limit reached
- socket_zone: kern.ipc.maxsockets limit reached
- zone_mbuf: kern.ipc.nmbufs limit reached
- zone_clust: kern.ipc.nmbclusters limit reached
- zone_jumbop: kern.ipc.nmbjumbop limit reached
- zone_jumbo9: kern.ipc.nmbjumbo9 limit reached
- zone_jumbo16: kern.ipc.nmbjumbo16 limit reached

Note that those warnings are printed not often than every five minutes and can
be globally turned off by setting sysctl/tunable vm.zone_warnings to 0.

Discussed on:	arch
Obtained from:	WHEEL Systems
MFC after:	2 weeks

3 files changed, 7 insertions, 0 deletions

diff --git a/sys/kern/kern_mbuf.c b/sys/kern/kern_mbuf.c
index f236071..3bdfd88 100644
--- a/sys/kern/kern_mbuf.c
+++ b/sys/kern/kern_mbuf.c
@@ -306,6 +306,7 @@ mbuf_init(void *dummy)
 	    MSIZE - 1, UMA_ZONE_MAXBUCKET);
 	if (nmbufs > 0)
 		nmbufs = uma_zone_set_max(zone_mbuf, nmbufs);
+	uma_zone_set_warning(zone_mbuf, "kern.ipc.nmbufs limit reached");
 
 	zone_clust = uma_zcreate(MBUF_CLUSTER_MEM_NAME, MCLBYTES,
 	    mb_ctor_clust, mb_dtor_clust,
@@ -317,6 +318,7 @@ mbuf_init(void *dummy)
 	    UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
 	if (nmbclusters > 0)
 		nmbclusters = uma_zone_set_max(zone_clust, nmbclusters);
+	uma_zone_set_warning(zone_clust, "kern.ipc.nmbclusters limit reached");
 
 	zone_pack = uma_zsecond_create(MBUF_PACKET_MEM_NAME, mb_ctor_pack,
 	    mb_dtor_pack, mb_zinit_pack, mb_zfini_pack, zone_mbuf);
@@ -332,6 +334,7 @@ mbuf_init(void *dummy)
 	    UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
 	if (nmbjumbop > 0)
 		nmbjumbop = uma_zone_set_max(zone_jumbop, nmbjumbop);
+	uma_zone_set_warning(zone_jumbop, "kern.ipc.nmbjumbop limit reached");
 
 	zone_jumbo9 = uma_zcreate(MBUF_JUMBO9_MEM_NAME, MJUM9BYTES,
 	    mb_ctor_clust, mb_dtor_clust,
@@ -344,6 +347,7 @@ mbuf_init(void *dummy)
 	uma_zone_set_allocf(zone_jumbo9, mbuf_jumbo_alloc);
 	if (nmbjumbo9 > 0)
 		nmbjumbo9 = uma_zone_set_max(zone_jumbo9, nmbjumbo9);
+	uma_zone_set_warning(zone_jumbo9, "kern.ipc.nmbjumbo9 limit reached");
 
 	zone_jumbo16 = uma_zcreate(MBUF_JUMBO16_MEM_NAME, MJUM16BYTES,
 	    mb_ctor_clust, mb_dtor_clust,
@@ -356,6 +360,7 @@ mbuf_init(void *dummy)
 	uma_zone_set_allocf(zone_jumbo16, mbuf_jumbo_alloc);
 	if (nmbjumbo16 > 0)
 		nmbjumbo16 = uma_zone_set_max(zone_jumbo16, nmbjumbo16);
+	uma_zone_set_warning(zone_jumbo16, "kern.ipc.nmbjumbo16 limit reached");
 
 	zone_ext_refcnt = uma_zcreate(MBUF_EXTREFCNT_MEM_NAME, sizeof(u_int),
 	    NULL, NULL,
diff --git a/sys/kern/uipc_socket.c b/sys/kern/uipc_socket.c
index 83fa112..de8ae5a 100644
--- a/sys/kern/uipc_socket.c
+++ b/sys/kern/uipc_socket.c
@@ -276,6 +276,7 @@ socket_init(void *tag)
 	socket_zone = uma_zcreate("socket", sizeof(struct socket), NULL, NULL,
 	    NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
 	maxsockets = uma_zone_set_max(socket_zone, maxsockets);
+	uma_zone_set_warning(socket_zone, "kern.ipc.maxsockets limit reached");
 	EVENTHANDLER_REGISTER(maxsockets_change, socket_zone_change, NULL,
 	    EVENTHANDLER_PRI_FIRST);
 }
diff --git a/sys/kern/uipc_usrreq.c b/sys/kern/uipc_usrreq.c
index c60b177..c732c70 100644
--- a/sys/kern/uipc_usrreq.c
+++ b/sys/kern/uipc_usrreq.c
@@ -1778,6 +1778,7 @@ unp_init(void)
 	if (unp_zone == NULL)
 		panic("unp_init");
 	uma_zone_set_max(unp_zone, maxsockets);
+	uma_zone_set_warning(unp_zone, "kern.ipc.maxsockets limit reached");
 	EVENTHANDLER_REGISTER(maxsockets_change, unp_zone_change,
 	    NULL, EVENTHANDLER_PRI_ANY);
 	LIST_INIT(&unp_dhead);