Date: Sat, 26 Apr 2014 12:18:17 +0000 (UTC) From: Dag-Erling Smørgrav <des@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r264966 - head/sys/vm Message-ID: <201404261218.s3QCIHaX021626@svn.freebsd.org>
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Author: des Date: Sat Apr 26 12:18:17 2014 New Revision: 264966 URL: http://svnweb.freebsd.org/changeset/base/264966 Log: Add sysctl OIDs showing the actual size and capacity of the swap zone. MFC after: 1 week Modified: head/sys/vm/swap_pager.c Modified: head/sys/vm/swap_pager.c ============================================================================== --- head/sys/vm/swap_pager.c Sat Apr 26 12:16:40 2014 (r264965) +++ head/sys/vm/swap_pager.c Sat Apr 26 12:18:17 2014 (r264966) @@ -164,6 +164,12 @@ static int overcommit = 0; SYSCTL_INT(_vm, OID_AUTO, overcommit, CTLFLAG_RW, &overcommit, 0, "Configure virtual memory overcommit behavior. See tuning(7) " "for details."); +static unsigned long swzone; +SYSCTL_ULONG(_vm, OID_AUTO, swzone, CTLFLAG_RD, &swzone, 0, + "Actual size of swap metadata zone"); +static unsigned long swap_maxpages; +SYSCTL_ULONG(_vm, OID_AUTO, swap_maxpages, CTLFLAG_RD, &swap_maxpages, 0, + "Maximum amount of swap supported"); /* bits from overcommit */ #define SWAP_RESERVE_FORCE_ON (1 << 0) @@ -506,7 +512,7 @@ swap_pager_init(void) void swap_pager_swap_init(void) { - int n, n2; + unsigned long n, n2; /* * Number of in-transit swap bp operations. Don't @@ -542,7 +548,7 @@ swap_pager_swap_init(void) /* * 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 + * can hold 32 pages, so this is probably overkill. This reservation * is typically limited to around 32MB by default. */ n = vm_cnt.v_page_count / 2; @@ -563,7 +569,9 @@ swap_pager_swap_init(void) n -= ((n + 2) / 3); } while (n > 0); if (n2 != n) - printf("Swap zone entries reduced from %d to %d.\n", n2, n); + printf("Swap zone entries reduced from %lu to %lu.\n", n2, n); + swap_maxpages = n * SWAP_META_PAGES; + swzone = n * sizeof(struct swblock); n2 = n; /*
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