Date: Tue, 24 Mar 2015 20:09:56 +0000 (UTC) From: Rui Paulo <rpaulo@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r280457 - head/sys/vm Message-ID: <201503242009.t2OK9u3Q070193@svn.freebsd.org>
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Author: rpaulo Date: Tue Mar 24 20:09:55 2015 New Revision: 280457 URL: https://svnweb.freebsd.org/changeset/base/280457 Log: Use TUNABLE_INT_FETCH for boot_pages. vm.boot_pages is marked as a CTLFLAG_RDTUN, but it's used by the VM before the sysctl subsystem is initialsed. We manually fetch the variable from the environment to work around this problem. Tested by: Keith White kwhite at uottawa.ca MFC after: 1 week Modified: head/sys/vm/vm_page.c Modified: head/sys/vm/vm_page.c ============================================================================== --- head/sys/vm/vm_page.c Tue Mar 24 20:07:27 2015 (r280456) +++ head/sys/vm/vm_page.c Tue Mar 24 20:09:55 2015 (r280457) @@ -134,8 +134,9 @@ long first_page; int vm_page_zero_count; static int boot_pages = UMA_BOOT_PAGES; -SYSCTL_INT(_vm, OID_AUTO, boot_pages, CTLFLAG_RDTUN, &boot_pages, 0, - "number of pages allocated for bootstrapping the VM system"); +SYSCTL_INT(_vm, OID_AUTO, boot_pages, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, + &boot_pages, 0, + "number of pages allocated for bootstrapping the VM system"); static int pa_tryrelock_restart; SYSCTL_INT(_vm, OID_AUTO, tryrelock_restart, CTLFLAG_RD, @@ -349,6 +350,7 @@ vm_page_startup(vm_offset_t vaddr) * Allocate memory for use when boot strapping the kernel memory * allocator. */ + TUNABLE_INT_FETCH("vm.boot_pages", &boot_pages); new_end = end - (boot_pages * UMA_SLAB_SIZE); new_end = trunc_page(new_end); mapped = pmap_map(&vaddr, new_end, end,
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