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Differential D23601 Diff 68081 head/sys/vm/vm_pageout.c

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head/sys/vm/vm_pageout.c

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static int disable_swap_pageouts; static int disable_swap_pageouts;
static int lowmem_period = 10; static int lowmem_period = 10;
static int swapdev_enabled; static int swapdev_enabled;
static int vm_panic_on_oom = 0; static int vm_panic_on_oom = 0;
SYSCTL_INT(_vm, OID_AUTO, panic_on_oom, SYSCTL_INT(_vm, OID_AUTO, panic_on_oom,
CTLFLAG_RWTUN, &vm_panic_on_oom, 0, CTLFLAG_RWTUN, &vm_panic_on_oom, 0,
"panic on out of memory instead of killing the largest process"); "Panic on the given number of out-of-memory errors instead of killing the largest process");
SYSCTL_INT(_vm, OID_AUTO, pageout_update_period, SYSCTL_INT(_vm, OID_AUTO, pageout_update_period,
CTLFLAG_RWTUN, &vm_pageout_update_period, 0, CTLFLAG_RWTUN, &vm_pageout_update_period, 0,
"Maximum active LRU update period"); "Maximum active LRU update period");
SYSCTL_INT(_vm, OID_AUTO, lowmem_period, CTLFLAG_RWTUN, &lowmem_period, 0, SYSCTL_INT(_vm, OID_AUTO, lowmem_period, CTLFLAG_RWTUN, &lowmem_period, 0,
"Low memory callback period"); "Low memory callback period");
▲ Show 20 Lines • Show All 1,758 Lines • ▼ Show 20 Lines if (size > bigsize) {
bigproc = p; bigproc = p;
bigsize = size; bigsize = size;
} else { } else {
PRELE(p); PRELE(p);
} }
} }
sx_sunlock(&allproc_lock); sx_sunlock(&allproc_lock);
if (bigproc != NULL) { if (bigproc != NULL) {
if (vm_panic_on_oom != 0) if (vm_panic_on_oom != 0 && --vm_panic_on_oom == 0)
panic("out of swap space"); panic("out of swap space");
PROC_LOCK(bigproc); PROC_LOCK(bigproc);
killproc(bigproc, "out of swap space"); killproc(bigproc, "out of swap space");
sched_nice(bigproc, PRIO_MIN); sched_nice(bigproc, PRIO_MIN);
_PRELE(bigproc); _PRELE(bigproc);
PROC_UNLOCK(bigproc); PROC_UNLOCK(bigproc);
} }
} }
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