Introduce a sysctl for reporting the number of fully populated reservations.
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=286390
@ -217,6 +217,11 @@ static long vm_reserv_freed;
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SYSCTL_LONG(_vm_reserv, OID_AUTO, freed, CTLFLAG_RD,
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&vm_reserv_freed, 0, "Cumulative number of freed reservations");
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static int sysctl_vm_reserv_fullpop(SYSCTL_HANDLER_ARGS);
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SYSCTL_PROC(_vm_reserv, OID_AUTO, fullpop, CTLTYPE_INT | CTLFLAG_RD, NULL, 0,
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sysctl_vm_reserv_fullpop, "I", "Current number of full reservations");
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static int sysctl_vm_reserv_partpopq(SYSCTL_HANDLER_ARGS);
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SYSCTL_OID(_vm_reserv, OID_AUTO, partpopq, CTLTYPE_STRING | CTLFLAG_RD, NULL, 0,
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@ -234,6 +239,33 @@ static boolean_t vm_reserv_has_pindex(vm_reserv_t rv,
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static void vm_reserv_populate(vm_reserv_t rv, int index);
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static void vm_reserv_reclaim(vm_reserv_t rv);
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/*
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* Returns the current number of full reservations.
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*
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* Since the number of full reservations is computed without acquiring the
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* free page queue lock, the returned value may be inexact.
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*/
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static int
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sysctl_vm_reserv_fullpop(SYSCTL_HANDLER_ARGS)
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{
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vm_paddr_t paddr;
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struct vm_phys_seg *seg;
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vm_reserv_t rv;
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int fullpop, segind;
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fullpop = 0;
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for (segind = 0; segind < vm_phys_nsegs; segind++) {
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seg = &vm_phys_segs[segind];
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paddr = roundup2(seg->start, VM_LEVEL_0_SIZE);
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while (paddr + VM_LEVEL_0_SIZE <= seg->end) {
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rv = &vm_reserv_array[paddr >> VM_LEVEL_0_SHIFT];
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fullpop += rv->popcnt == VM_LEVEL_0_NPAGES;
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paddr += VM_LEVEL_0_SIZE;
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}
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}
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return (sysctl_handle_int(oidp, &fullpop, 0, req));
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}
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/*
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* Describes the current state of the partially-populated reservation queue.
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*/
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