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Make the mb_alloc low-watermark sysctl-tunable read-only and make

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netstat(1) not display it for now because its effects are not yet
completely implemented and we're about to cut 5.2-RELEASE.
This is temporary.

Approved by: re (scottl, rwatson)
This commit is contained in:
Bosko Milekic 2003-05-15 19:05:28 +00:00
parent 95f04def4b
commit 11583f6c93
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=115037
2 changed files with 9 additions and 2 deletions
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7
sys/kern/subr_mbuf.c
View file

@ -53,6 +53,9 @@
/*
* mb_alloc: network buffer allocator
*
* XXX: currently, the "low watermark" sysctl is marked read-only as its
* effects are not completely implemented. To be fixed soon.
*/
/*
@ -318,11 +321,11 @@ SYSCTL_INT(_kern_ipc, OID_AUTO, mbuf_wait, CTLFLAG_RW, &mbuf_wait, 0,
"Sleep time of mbuf subsystem wait allocations during exhaustion");
SYSCTL_UINT(_kern_ipc, OID_AUTO, mbuf_hiwm, CTLFLAG_RW, &mbuf_hiwm, 0,
"Upper limit of number of mbufs allowed in each cache");
SYSCTL_UINT(_kern_ipc, OID_AUTO, mbuf_lowm, CTLFLAG_RW, &mbuf_lowm, 0,
SYSCTL_UINT(_kern_ipc, OID_AUTO, mbuf_lowm, CTLFLAG_RD, &mbuf_lowm, 0,
"Lower limit of number of mbufs allowed in each cache");
SYSCTL_UINT(_kern_ipc, OID_AUTO, clust_hiwm, CTLFLAG_RW, &clust_hiwm, 0,
"Upper limit of number of mbuf clusters allowed in each cache");
SYSCTL_UINT(_kern_ipc, OID_AUTO, clust_lowm, CTLFLAG_RW, &clust_lowm, 0,
SYSCTL_UINT(_kern_ipc, OID_AUTO, clust_lowm, CTLFLAG_RD, &clust_lowm, 0,
"Lower limit of number of mbuf clusters allowed in each cache");
SYSCTL_STRUCT(_kern_ipc, OID_AUTO, mbstat, CTLFLAG_RD, &mbstat, mbstat,
"Mbuf general information and statistics");

4
usr.bin/netstat/mbuf.c
View file

@ -253,7 +253,9 @@ mbpr(u_long mbaddr, u_long mbtaddr __unused, u_long nmbcaddr, u_long nmbufaddr,
totused[0] = totnum - totfree;
printf("\tTotal:\t\t%lu/%lu (in use/in pool)\n", totused[0], totnum);
printf("\tMbuf cache high watermark: %d\n", mbuf_hiwm);
#ifdef NOTYET
printf("\tMbuf cache low watermark: %d\n", mbuf_lowm);
#endif
printf("\tMaximum possible: %d\n", nmbufs);
printf("\tAllocated mbuf types:\n");
for (mp = mbtypenames; mp->mt_name; mp++) {
@ -292,7 +294,9 @@ mbpr(u_long mbaddr, u_long mbtaddr __unused, u_long nmbcaddr, u_long nmbufaddr,
totused[1] = totnum - totfree;
printf("\tTotal:\t\t%lu/%lu (in use/in pool)\n", totused[1], totnum);
printf("\tCluster cache high watermark: %d\n", clust_hiwm);
#ifdef NOTYET
printf("\tCluster cache low watermark: %d\n", clust_lowm);
#endif
printf("\tMaximum possible: %d\n", nmbclusters);
printf("\t%lu%% of cluster map consumed\n", ((totspace[1] * 100) /
(nmbclusters * MCLBYTES)));