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Reduce the maximum KVA reserved for swap meta structures from 70 to 32 MB.

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Reduce the swap meta calculation by a factor of 2, it's still massive overkill.

X-MFC after: immediately
This commit is contained in:
Matthew Dillon 2002-08-31 21:15:29 +00:00
parent e0444818b2
commit ec61f55d42
2 changed files with 7 additions and 5 deletions
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8
sys/i386/include/param.h
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@ -109,15 +109,17 @@
#define KSTACK_GUARD /* compile in the kstack guard page */
/*
* Ceiling on amount of swblock kva space.
* Ceiling on amount of swblock kva space, can be changed via
* the kern.maxswzone /boot/loader.conf variable.
*/
#ifndef VM_SWZONE_SIZE_MAX
#define VM_SWZONE_SIZE_MAX (70 * 1024 * 1024)
#define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024)
#endif
/*
* Ceiling on size of buffer cache (really only effects write queueing,
* the VM page cache is not effected).
* the VM page cache is not effected), can be changed via
* the kern.maxbcache /boot/loader.conf variable.
*/
#ifndef VM_BCACHE_SIZE_MAX
#define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024)

4
sys/vm/swap_pager.c
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@ -314,9 +314,9 @@ swap_pager_swap_init()
* Initialize our zone. Right now I'm just guessing on the number
* we need based on the number of pages in the system. Each swblock
* can hold 16 pages, so this is probably overkill. This reservation
* is typically limited to around 70MB by default.
* is typically limited to around 32MB by default.
*/
n = cnt.v_page_count;
n = cnt.v_page_count / 2;
if (maxswzone && n > maxswzone / sizeof(struct swblock))
n = maxswzone / sizeof(struct swblock);
n2 = n;