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Avoid the "Cannot allocate memory" problem that appears on heavily

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loaded systems by retrying the sysctl() with a larger buffer if it
fails with ENOMEM. For good measure, allocate 10% more memory than
sysctl() claims is necessary.

PR:		8275
Reviewed by:	David Greenman <dg@freebsd.org>
This commit is contained in:
Dag-Erling Smørgrav 1998-10-12 20:36:33 +00:00
parent 9bbd8a2498
commit b2d3d0f097
1 changed files with 10 additions and 4 deletions
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14
lib/libkvm/kvm_proc.c
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@ -302,10 +302,16 @@ kvm_getprocs(kd, op, arg, cnt)
_kvm_syserr(kd, kd->program, "kvm_getprocs");
return (0);
}
kd->procbase = (struct kinfo_proc *)_kvm_malloc(kd, size);
if (kd->procbase == 0)
return (0);
st = sysctl(mib, op == KERN_PROC_ALL ? 3 : 4, kd->procbase, &size, NULL, 0);
kd->procbase = 0;
do {
size += size / 10;
kd->procbase = (struct kinfo_proc *)
_kvm_realloc(kd, kd->procbase, size);
if (kd->procbase == 0)
return (0);
st = sysctl(mib, op == KERN_PROC_ALL ? 3 : 4,
kd->procbase, &size, NULL, 0);
} while (st == -1 && errno == ENOMEM);
if (st == -1) {
_kvm_syserr(kd, kd->program, "kvm_getprocs");
return (0);