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Lines 237-243
int zfs_arc_p_min_shift = 0;
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| 237 |
int zfs_disable_dup_eviction = 0; |
237 |
int zfs_disable_dup_eviction = 0; |
| 238 |
uint64_t zfs_arc_average_blocksize = 8 * 1024; /* 8KB */ |
238 |
uint64_t zfs_arc_average_blocksize = 8 * 1024; /* 8KB */ |
| 239 |
u_int zfs_arc_free_target = 0; |
239 |
u_int zfs_arc_free_target = 0; |
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240 |
u_int zfs_arc_wakeup_pager = 0; |
| 241 |
u_int zfs_arc_wakeup_delay = 500; |
| 240 |
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242 |
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243 |
#define WAKE_PAGER |
| 244 |
#ifdef WAKE_PAGER |
| 245 |
#define WAKE_PAGER_CONSTANT 10 / 9 /* Pager wakeup threshold */ |
| 246 |
static int arc_init_done = 0; /* After arc_warm is valid */ |
| 247 |
extern void pagedaemon_wakeup(void); |
| 248 |
#endif |
| 249 |
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| 241 |
/* Absolute min for arc min / max is 16MB. */ |
250 |
/* Absolute min for arc min / max is 16MB. */ |
| 242 |
static uint64_t arc_abs_min = 16 << 20; |
251 |
static uint64_t arc_abs_min = 16 << 20; |
| 243 |
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252 |
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Lines 252-257
arc_free_target_init(void *unused __unused)
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| 252 |
{ |
261 |
{ |
| 253 |
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262 |
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| 254 |
zfs_arc_free_target = vm_pageout_wakeup_thresh; |
263 |
zfs_arc_free_target = vm_pageout_wakeup_thresh; |
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264 |
zfs_arc_wakeup_pager = zfs_arc_free_target * WAKE_PAGER_CONSTANT; |
| 255 |
} |
265 |
} |
| 256 |
SYSINIT(arc_free_target_init, SI_SUB_KTHREAD_PAGE, SI_ORDER_ANY, |
266 |
SYSINIT(arc_free_target_init, SI_SUB_KTHREAD_PAGE, SI_ORDER_ANY, |
| 257 |
arc_free_target_init, NULL); |
267 |
arc_free_target_init, NULL); |
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Lines 3476-3481
int64_t arc_pages_pp_reserve = 64;
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| 3476 |
int64_t arc_swapfs_reserve = 64; |
3486 |
int64_t arc_swapfs_reserve = 64; |
| 3477 |
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3487 |
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| 3478 |
/* |
3488 |
/* |
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3489 |
* Declare file-local static for event processor bypass |
| 3490 |
*/ |
| 3491 |
static unsigned int arc_no_wake_event = 0; |
| 3492 |
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| 3493 |
/* |
| 3479 |
* Return the amount of memory that can be consumed before reclaim will be |
3494 |
* Return the amount of memory that can be consumed before reclaim will be |
| 3480 |
* needed. Positive if there is sufficient free memory, negative indicates |
3495 |
* needed. Positive if there is sufficient free memory, negative indicates |
| 3481 |
* the amount of memory that needs to be freed up. |
3496 |
* the amount of memory that needs to be freed up. |
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Lines 3488-3493
arc_available_memory(void)
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| 3488 |
free_memory_reason_t r = FMR_UNKNOWN; |
3503 |
free_memory_reason_t r = FMR_UNKNOWN; |
| 3489 |
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3504 |
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| 3490 |
#ifdef _KERNEL |
3505 |
#ifdef _KERNEL |
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3506 |
#ifdef WAKE_PAGER |
| 3507 |
sbintime_t now; |
| 3508 |
static sbintime_t last_pagedaemon_wake = 0; |
| 3509 |
void call_arc_kmem_reap(void); |
| 3510 |
#endif /* WAKE_PAGER */ |
| 3511 |
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| 3491 |
if (needfree > 0) { |
3512 |
if (needfree > 0) { |
| 3492 |
n = PAGESIZE * (-needfree); |
3513 |
n = PAGESIZE * (-needfree); |
| 3493 |
if (n < lowest) { |
3514 |
if (n < lowest) { |
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Lines 3495-3500
arc_available_memory(void)
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| 3495 |
r = FMR_NEEDFREE; |
3516 |
r = FMR_NEEDFREE; |
| 3496 |
} |
3517 |
} |
| 3497 |
} |
3518 |
} |
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3519 |
#ifdef WAKE_PAGER |
| 3520 |
/* |
| 3521 |
* If memory is less than the ARC wakeup threshold and time has expired since |
| 3522 |
* the last time we woke the pager... Do not execute until the ARC warms up. |
| 3523 |
*/ |
| 3524 |
if ((arc_init_done) && |
| 3525 |
(((int64_t) freemem - zfs_arc_wakeup_pager) < 0) && |
| 3526 |
(arc_warm == B_TRUE) |
| 3527 |
) { |
| 3528 |
now = getsbinuptime(); |
| 3529 |
if ((now - last_pagedaemon_wake) / SBT_1MS > zfs_arc_wakeup_delay) { |
| 3530 |
last_pagedaemon_wake = now; |
| 3531 |
arc_no_wake_event++; /* Set bypass flag for ARC */ |
| 3532 |
call_arc_kmem_reap(); /* Reap caches if we're close */ |
| 3533 |
DTRACE_PROBE(arc__wake_pagedaemon); |
| 3534 |
(void) pagedaemon_wakeup(); /* Wake the pager */ |
| 3535 |
} |
| 3536 |
} |
| 3537 |
#endif /* WAKE_PAGER */ |
| 3498 |
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3538 |
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| 3499 |
/* |
3539 |
/* |
| 3500 |
* Cooperate with pagedaemon when it's time for it to scan |
3540 |
* Cooperate with pagedaemon when it's time for it to scan |
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Lines 3684-3689
arc_kmem_reap_now(void)
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| 3684 |
DTRACE_PROBE(arc__kmem_reap_end); |
3724 |
DTRACE_PROBE(arc__kmem_reap_end); |
| 3685 |
} |
3725 |
} |
| 3686 |
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3726 |
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3727 |
void call_arc_kmem_reap() |
| 3728 |
{ |
| 3729 |
arc_kmem_reap_now(); |
| 3730 |
} |
| 3731 |
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| 3687 |
/* |
3732 |
/* |
| 3688 |
* Threads can block in arc_get_data_buf() waiting for this thread to evict |
3733 |
* Threads can block in arc_get_data_buf() waiting for this thread to evict |
| 3689 |
* enough data and signal them to proceed. When this happens, the threads in |
3734 |
* enough data and signal them to proceed. When this happens, the threads in |
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Lines 5431-5436
static eventhandler_tag arc_event_lowmem = NULL;
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| 5431 |
static void |
5476 |
static void |
| 5432 |
arc_lowmem(void *arg __unused, int howto __unused) |
5477 |
arc_lowmem(void *arg __unused, int howto __unused) |
| 5433 |
{ |
5478 |
{ |
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5479 |
if (arc_no_wake_event) { /* Don't do it if we woke the pager */ |
| 5480 |
arc_no_wake_event = 0; /* Just clear the flag */ |
| 5481 |
return; |
| 5482 |
} |
| 5434 |
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5483 |
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| 5435 |
mutex_enter(&arc_reclaim_lock); |
5484 |
mutex_enter(&arc_reclaim_lock); |
| 5436 |
/* XXX: Memory deficit should be passed as argument. */ |
5485 |
/* XXX: Memory deficit should be passed as argument. */ |
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Lines 5696-5701
arc_init(void)
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| 5696 |
printf(" in /boot/loader.conf.\n"); |
5745 |
printf(" in /boot/loader.conf.\n"); |
| 5697 |
} |
5746 |
} |
| 5698 |
#endif |
5747 |
#endif |
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5748 |
#ifdef WAKE_PAGER |
| 5749 |
arc_init_done++; |
| 5750 |
#endif /* WAKE_PAGER */ |
| 5699 |
} |
5751 |
} |
| 5700 |
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5752 |
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| 5701 |
void |
5753 |
void |