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vm_pageout: Disallow invalid values for act_scan_laundry_weight

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PR:		234167
MFC after:	2 weeks
This commit is contained in:
Mark Johnston 2025-04-18 17:31:27 +00:00
parent 81bd0f46fc
commit d8b03c5904
1 changed files with 17 additions and 2 deletions
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19
sys/vm/vm_pageout.c
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@ -184,8 +184,23 @@ SYSCTL_INT(_vm, OID_AUTO, pageout_oom_seq,
"back-to-back calls to oom detector to start OOM");
static int act_scan_laundry_weight = 3;
SYSCTL_INT(_vm, OID_AUTO, act_scan_laundry_weight, CTLFLAG_RWTUN,
&act_scan_laundry_weight, 0,
static int
sysctl_act_scan_laundry_weight(SYSCTL_HANDLER_ARGS)
{
int error, newval;
newval = act_scan_laundry_weight;
error = sysctl_handle_int(oidp, &newval, 0, req);
if (error || req->newptr == NULL)
return (error);
if (newval < 1)
return (EINVAL);
act_scan_laundry_weight = newval;
return (0);
}
SYSCTL_PROC(_vm, OID_AUTO, act_scan_laundry_weight, CTLFLAG_RWTUN | CTLTYPE_INT,
&act_scan_laundry_weight, 0, sysctl_act_scan_laundry_weight, "I",
"weight given to clean vs. dirty pages in active queue scans");
static u_int vm_background_launder_rate = 4096;