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Revert current code removal changes, this support now exists in the SPL. The branch is being left in place because I expect there to be other new changes soon

This commit is contained in:
Brian Behlendorf 2009-02-04 15:19:19 -08:00
parent 066580cffa
commit 770152bd1d
1 changed files with 9 additions and 19 deletions
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28
module/zfs/arc.c
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@ -1789,12 +1789,10 @@ arc_shrink(void)
static int
arc_reclaim_needed(void)
{
#ifdef _KERNEL
#ifdef HAVE_SPL
/* FIXME: Linux VM integration */
#else
uint64_t extra;
#ifdef _KERNEL
if (needfree)
return (1);
@ -1838,12 +1836,12 @@ arc_reclaim_needed(void)
if (btop(vmem_size(heap_arena, VMEM_FREE)) <
(btop(vmem_size(heap_arena, VMEM_FREE | VMEM_ALLOC)) >> 2))
return (1);
#endif /* __i386 */
#endif /* HAVE_SPL */
#endif
#else
if (spa_get_random(100) == 0)
return (1);
#endif /* _KERNEL */
#endif
return (0);
}
@ -1857,7 +1855,6 @@ arc_kmem_reap_now(arc_reclaim_strategy_t strat)
extern kmem_cache_t *zio_data_buf_cache[];
#ifdef _KERNEL
#ifndef HAVE_SPL
if (arc_meta_used >= arc_meta_limit) {
/*
* We are exceeding our meta-data cache limit.
@ -1865,14 +1862,13 @@ arc_kmem_reap_now(arc_reclaim_strategy_t strat)
*/
dnlc_reduce_cache((void *)(uintptr_t)arc_reduce_dnlc_percent);
}
#endif /* HAVE_SPL */
#if defined(__i386)
/*
* Reclaim unused memory from all kmem caches.
*/
kmem_reap();
#endif /* __i386 */
#endif /* _KERNEL */
#endif
#endif
/*
* An aggressive reclamation will shrink the cache size as well as
@ -2023,7 +2019,6 @@ arc_evict_needed(arc_buf_contents_t type)
return (1);
#ifdef _KERNEL
#ifndef HAVE_SPL
/*
* If zio data pages are being allocated out of a separate heap segment,
* then enforce that the size of available vmem for this area remains
@ -2033,8 +2028,7 @@ arc_evict_needed(arc_buf_contents_t type)
vmem_size(zio_arena, VMEM_FREE) <
(vmem_size(zio_arena, VMEM_ALLOC) >> 5))
return (1);
#endif /* HAVE_SPL */
#endif /* _KERNEL */
#endif
if (arc_reclaim_needed())
return (1);
@ -3256,7 +3250,6 @@ arc_memory_throttle(uint64_t reserve, uint64_t txg)
* the arc is already going to be evicting, so we just want to
* continue to let page writes occur as quickly as possible.
*/
#ifndef HAVE_SPL
if (curproc == proc_pageout) {
if (page_load > MAX(ptob(minfree), available_memory) / 4)
return (ERESTART);
@ -3268,7 +3261,6 @@ arc_memory_throttle(uint64_t reserve, uint64_t txg)
ARCSTAT_INCR(arcstat_memory_throttle_count, 1);
return (EAGAIN);
}
#endif /* HAVE_SPL */
page_load = 0;
if (arc_size > arc_c_min) {
@ -3361,10 +3353,8 @@ arc_init(void)
* than the addressable space (intel in 32-bit mode), we may
* need to limit the cache to 1/8 of VM size.
*/
#ifndef HAVE_SPL
arc_c = MIN(arc_c, vmem_size(heap_arena, VMEM_ALLOC | VMEM_FREE) / 8);
#endif /* HAVE_SPL */
#endif /* _KERNEL */
#endif
/* set min cache to 1/32 of all memory, or 64MB, whichever is more */
arc_c_min = MAX(arc_c / 4, 64<<20);