Date: Mon, 1 Jun 2009 08:15:49 -0400 From: John Baldwin <jhb@freebsd.org> To: Kip Macy <kmacy@freebsd.org> Cc: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: Re: svn commit: r193078 - in user/kmacy/releng_7_2_fcs/sys: amd64/amd64 vm Message-ID: <200906010815.49692.jhb@freebsd.org> In-Reply-To: <200905300105.n4U15VAF092086@svn.freebsd.org> References: <200905300105.n4U15VAF092086@svn.freebsd.org>
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On Friday 29 May 2009 9:05:31 pm Kip Macy wrote: > - --m->wire_count; > + atomic_subtract_int(&m->wire_count, 1); > if (m->wire_count == 0) > return _pmap_unwire_pte_hold(pmap, va, m, free); This is not safe. Use atomic_fetchadd() instead to do this atomically the way refcount_* do. -- John Baldwin
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