Date: Sat, 24 Jun 2017 17:10:33 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r320319 - head/sys/vm Message-ID: <201706241710.v5OHAXZs018298@repo.freebsd.org>
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Author: alc Date: Sat Jun 24 17:10:33 2017 New Revision: 320319 URL: https://svnweb.freebsd.org/changeset/base/320319 Log: Increase the pageout cluster size to 32 pages. Decouple the pageout cluster size from the size of the hash table entry used by the swap pager for mapping (object, pindex) to a block on the swap device(s), and keep the size of a hash table entry at its current size. Eliminate a pointless macro. Reviewed by: kib, markj (an earlier version) MFC after: 4 weeks Differential Revision: https://reviews.freebsd.org/D11305 Modified: head/sys/vm/swap_pager.c head/sys/vm/vm_pageout.c Modified: head/sys/vm/swap_pager.c ============================================================================== --- head/sys/vm/swap_pager.c Sat Jun 24 17:04:27 2017 (r320318) +++ head/sys/vm/swap_pager.c Sat Jun 24 17:10:33 2017 (r320319) @@ -120,7 +120,7 @@ __FBSDID("$FreeBSD$"); * The 64-page limit is due to the radix code (kern/subr_blist.c). */ #ifndef MAX_PAGEOUT_CLUSTER -#define MAX_PAGEOUT_CLUSTER 16 +#define MAX_PAGEOUT_CLUSTER 32 #endif #if !defined(SWB_NPAGES) @@ -134,7 +134,7 @@ __FBSDID("$FreeBSD$"); * Unused disk addresses within a swap area are allocated and managed * using a blist. */ -#define SWAP_META_PAGES (SWB_NPAGES * 2) +#define SWAP_META_PAGES 32 #define SWAP_META_MASK (SWAP_META_PAGES - 1) struct swblock { Modified: head/sys/vm/vm_pageout.c ============================================================================== --- head/sys/vm/vm_pageout.c Sat Jun 24 17:04:27 2017 (r320318) +++ head/sys/vm/vm_pageout.c Sat Jun 24 17:10:33 2017 (r320319) @@ -251,8 +251,7 @@ static u_int vm_background_launder_max = 20 * 1024; SYSCTL_UINT(_vm, OID_AUTO, background_launder_max, CTLFLAG_RW, &vm_background_launder_max, 0, "background laundering cap, in kilobytes"); -#define VM_PAGEOUT_PAGE_COUNT 16 -int vm_pageout_page_count = VM_PAGEOUT_PAGE_COUNT; +int vm_pageout_page_count = 32; int vm_page_max_wired; /* XXX max # of wired pages system-wide */ SYSCTL_INT(_vm, OID_AUTO, max_wired,
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