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Add hysteresis to the 'swap_pager_getswapspace; failed' console message.

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Also widen the hysteresis levels a little ( these really should be
    dynamically configured ).
This commit is contained in:
Matthew Dillon 1999-02-06 07:22:21 +00:00
parent 1dbeea2692
commit 2b0d37a4f8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=43700
1 changed files with 9 additions and 5 deletions
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14
sys/vm/swap_pager.c
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@ -64,7 +64,7 @@
*
* @(#)swap_pager.c 8.9 (Berkeley) 3/21/94
*
* $Id: swap_pager.c,v 1.111 1999/01/24 06:04:51 dillon Exp $
* $Id: swap_pager.c,v 1.112 1999/01/27 18:19:52 dillon Exp $
*/
#include <sys/param.h>
@ -166,7 +166,7 @@ struct pagerops swappagerops = {
int dmmax;
static int dmmax_mask;
int nswap_lowat = 128; /* in pages, swap_pager_full warning */
int nswap_hiwat = 256; /* in pages, swap_pager_full warning */
int nswap_hiwat = 512; /* in pages, swap_pager_full warning */
static __inline void swp_sizecheck __P((void));
static void swp_pager_sync_iodone __P((struct buf *bp));
@ -203,9 +203,10 @@ static __inline void
swp_sizecheck()
{
if (vm_swap_size < nswap_lowat) {
if (swap_pager_full == 0)
if (swap_pager_full == 0) {
printf("swap_pager: out of swap space\n");
swap_pager_full = 1;
swap_pager_full = 1;
}
} else if (vm_swap_size > nswap_hiwat) {
swap_pager_full = 0;
}
@ -443,7 +444,10 @@ swp_pager_getswapspace(npages)
daddr_t blk;
if ((blk = blist_alloc(swapblist, npages)) == SWAPBLK_NONE) {
printf("swap_pager_getswapspace: failed\n");
if (swap_pager_full != 2) {
printf("swap_pager_getswapspace: failed\n");
swap_pager_full = 2;
}
} else {
vm_swap_size -= npages;
swp_sizecheck();