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if kmem_malloc() fails while trying to allocate an mbuf cluster, try

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and free some space by calling m_reclaim().  Also, log the "mb_map full"
error message (at most) every 60-seconds.  The old code would log it
once over the lifetime of the system, but that's not a useful diagnostic.
(More useful is the new behaviour, which roughly indicates how often
periods of heavy load occur, without spamming the console and system
logs with messages.)
This commit is contained in:
cgd 1996-06-13 17:02:23 +00:00
parent 06c209646e
commit 1abc77f86d
1 changed files with 12 additions and 6 deletions
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18
sys/kern/uipc_mbuf.c
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@ -1,4 +1,4 @@
/* $NetBSD: uipc_mbuf.c,v 1.15 1996/02/09 19:00:45 christos Exp $ */
/* $NetBSD: uipc_mbuf.c,v 1.16 1996/06/13 17:02:23 cgd Exp $ */
/*
* Copyright (c) 1982, 1986, 1988, 1991, 1993
@ -78,19 +78,25 @@ m_clalloc(ncl, nowait)
register int ncl;
int nowait;
{
static int logged;
volatile static struct timeval lastlogged;
struct timeval curtime, logdiff;
register caddr_t p;
register int i;
int npg;
int npg, s;
npg = ncl * CLSIZE;
p = (caddr_t)kmem_malloc(mb_map, ctob(npg), !nowait);
if (p == NULL) {
if (logged == 0) {
logged++;
s = splclock();
curtime = time;
splx(s);
timersub(&curtime, &lastlogged, &logdiff);
if (logdiff.tv_sec >= 60) {
lastlogged = curtime;
log(LOG_ERR, "mb_map full\n");
}
return (0);
m_reclaim();
return (mclfree != NULL);
}
ncl = ncl * CLBYTES / MCLBYTES;
for (i = 0; i < ncl; i++) {