Differential D23978 Diff 69275 head/sys/vm/swap_pager.c

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head/sys/vm/swap_pager.c

Show First 20 Lines • Show All 171 Lines • ▼ Show 20 Lines	SYSCTL_INT(_vm, VM_OVERCOMMIT, overcommit, CTLFLAG_RW, &overcommit, 0,
"for details.");		"for details.");
static unsigned long swzone;		static unsigned long swzone;
SYSCTL_ULONG(_vm, OID_AUTO, swzone, CTLFLAG_RD, &swzone, 0,		SYSCTL_ULONG(_vm, OID_AUTO, swzone, CTLFLAG_RD, &swzone, 0,
"Actual size of swap metadata zone");		"Actual size of swap metadata zone");
static unsigned long swap_maxpages;		static unsigned long swap_maxpages;
SYSCTL_ULONG(_vm, OID_AUTO, swap_maxpages, CTLFLAG_RD, &swap_maxpages, 0,		SYSCTL_ULONG(_vm, OID_AUTO, swap_maxpages, CTLFLAG_RD, &swap_maxpages, 0,
"Maximum amount of swap supported");		"Maximum amount of swap supported");

static counter_u64_t swap_free_deferred;		static COUNTER_U64_DEFINE_EARLY(swap_free_deferred);
SYSCTL_COUNTER_U64(_vm_stats_swap, OID_AUTO, free_deferred,		SYSCTL_COUNTER_U64(_vm_stats_swap, OID_AUTO, free_deferred,
CTLFLAG_RD, &swap_free_deferred,		CTLFLAG_RD, &swap_free_deferred,
"Number of pages that deferred freeing swap space");		"Number of pages that deferred freeing swap space");

static counter_u64_t swap_free_completed;		static COUNTER_U64_DEFINE_EARLY(swap_free_completed);
SYSCTL_COUNTER_U64(_vm_stats_swap, OID_AUTO, free_completed,		SYSCTL_COUNTER_U64(_vm_stats_swap, OID_AUTO, free_completed,
CTLFLAG_RD, &swap_free_completed,		CTLFLAG_RD, &swap_free_completed,
"Number of deferred frees completed");		"Number of deferred frees completed");

/* bits from overcommit */		/* bits from overcommit */
#define SWAP_RESERVE_FORCE_ON (1 << 0)		#define SWAP_RESERVE_FORCE_ON (1 << 0)
#define SWAP_RESERVE_RLIMIT_ON (1 << 1)		#define SWAP_RESERVE_RLIMIT_ON (1 << 1)
#define SWAP_RESERVE_ALLOW_NONWIRED (1 << 2)		#define SWAP_RESERVE_ALLOW_NONWIRED (1 << 2)
▲ Show 20 Lines • Show All 327 Lines • ▼ Show 20 Lines	swap_pager_init(void)
int i;		int i;

for (i = 0; i < NOBJLISTS; ++i)		for (i = 0; i < NOBJLISTS; ++i)
TAILQ_INIT(&swap_pager_object_list[i]);		TAILQ_INIT(&swap_pager_object_list[i]);
mtx_init(&sw_dev_mtx, "swapdev", NULL, MTX_DEF);		mtx_init(&sw_dev_mtx, "swapdev", NULL, MTX_DEF);
sx_init(&sw_alloc_sx, "swspsx");		sx_init(&sw_alloc_sx, "swspsx");
sx_init(&swdev_syscall_lock, "swsysc");		sx_init(&swdev_syscall_lock, "swsysc");
}		}

static void
swap_pager_counters(void)
{

swap_free_deferred = counter_u64_alloc(M_WAITOK);
swap_free_completed = counter_u64_alloc(M_WAITOK);
}
SYSINIT(swap_counters, SI_SUB_CPU, SI_ORDER_ANY, swap_pager_counters, NULL);

/*		/*
* SWAP_PAGER_SWAP_INIT() - swap pager initialization from pageout process		* SWAP_PAGER_SWAP_INIT() - swap pager initialization from pageout process
*		*
* Expected to be started from pageout process once, prior to entering		* Expected to be started from pageout process once, prior to entering
* its main loop.		* its main loop.
*/		*/
void		void
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