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Since breakage of malloc(9)/uma_zalloc(9) is totally non-optional in

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GENERIC/for WITNESS users, make sure the sysctl to disable the behavior
is read-only and always enabled.
This commit is contained in:
green 2004-07-19 15:05:24 +00:00
parent db370dc961
commit b2709996c8
1 changed files with 6 additions and 0 deletions
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6
sys/vm/uma_core.c
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@ -224,9 +224,15 @@ void uma_print_zone(uma_zone_t);
void uma_print_stats(void);
static int sysctl_vm_zone(SYSCTL_HANDLER_ARGS);
#ifdef WITNESS
static int nosleepwithlocks = 1;
SYSCTL_INT(_debug, OID_AUTO, nosleepwithlocks, CTLFLAG_RD, &nosleepwithlocks,
0, "Convert M_WAITOK to M_NOWAIT to avoid lock-held-across-sleep paths");
#else
static int nosleepwithlocks = 0;
SYSCTL_INT(_debug, OID_AUTO, nosleepwithlocks, CTLFLAG_RW, &nosleepwithlocks,
0, "Convert M_WAITOK to M_NOWAIT to avoid lock-held-across-sleep paths");
#endif
SYSCTL_OID(_vm, OID_AUTO, zone, CTLTYPE_STRING|CTLFLAG_RD,
NULL, 0, sysctl_vm_zone, "A", "Zone Info");
SYSINIT(uma_startup3, SI_SUB_VM_CONF, SI_ORDER_SECOND, uma_startup3, NULL);