Date: Mon, 26 Apr 2010 01:12:14 +0000 (UTC) From: Kip Macy <kmacy@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r207214 - user/kmacy/head_page_lock_2/sys/vm Message-ID: <201004260112.o3Q1CE6o025676@svn.freebsd.org>
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Author: kmacy Date: Mon Apr 26 01:12:13 2010 New Revision: 207214 URL: http://svn.freebsd.org/changeset/base/207214 Log: My understanding (alc correct me if I'm wrong) is that we don't need protect wire_count if the page is unmanaged and the wire count is 1 Modified: user/kmacy/head_page_lock_2/sys/vm/vm_page.c Modified: user/kmacy/head_page_lock_2/sys/vm/vm_page.c ============================================================================== --- user/kmacy/head_page_lock_2/sys/vm/vm_page.c Sun Apr 25 23:51:05 2010 (r207213) +++ user/kmacy/head_page_lock_2/sys/vm/vm_page.c Mon Apr 26 01:12:13 2010 (r207214) @@ -1595,10 +1595,13 @@ void vm_page_unwire(vm_page_t m, int activate) { - vm_page_lock_assert(m, MA_OWNED); if (m->flags & PG_FICTITIOUS) return; if (m->wire_count > 0) { +#ifdef INVARIANTS + if ((m->wire_count > 1) || !(m->flags & PG_UNMANAGED)) + vm_page_lock_assert(m, MA_OWNED); +#endif m->wire_count--; if (m->wire_count == 0) { atomic_subtract_int(&cnt.v_wire_count, 1);
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