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: o...@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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