svn commit: r353681 - head/sys/vm
Konstantin Belousov
kib at FreeBSD.org
Thu Oct 17 13:49:48 UTC 2019
Author: kib
Date: Thu Oct 17 13:49:47 2019
New Revision: 353681
URL: https://svnweb.freebsd.org/changeset/base/353681
Log:
swapon_check_swzone(): use already calculated static variables.
Submitted by: ota at j.email.ne.jp
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D22065
Modified:
head/sys/vm/swap_pager.c
Modified: head/sys/vm/swap_pager.c
==============================================================================
--- head/sys/vm/swap_pager.c Thu Oct 17 13:08:50 2019 (r353680)
+++ head/sys/vm/swap_pager.c Thu Oct 17 13:49:47 2019 (r353681)
@@ -590,6 +590,7 @@ swap_pager_swap_init(void)
if (n < n2)
printf("Swap blk zone entries changed from %lu to %lu.\n",
n2, n);
+ /* absolute maximum we can handle assuming 100% efficiency */
swap_maxpages = n * SWAP_META_PAGES;
swzone = n * sizeof(struct swblk);
if (!uma_zone_reserve_kva(swpctrie_zone, n))
@@ -2250,17 +2251,12 @@ done:
static void
swapon_check_swzone(void)
{
- unsigned long maxpages, npages;
- npages = swap_total;
- /* absolute maximum we can handle assuming 100% efficiency */
- maxpages = uma_zone_get_max(swblk_zone) * SWAP_META_PAGES;
-
/* recommend using no more than half that amount */
- if (npages > maxpages / 2) {
+ if (swap_total > swap_maxpages / 2) {
printf("warning: total configured swap (%lu pages) "
"exceeds maximum recommended amount (%lu pages).\n",
- npages, maxpages / 2);
+ swap_total, swap_maxpages / 2);
printf("warning: increase kern.maxswzone "
"or reduce amount of swap.\n");
}
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