Date: Tue, 8 Jun 2010 04:48:36 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-7@freebsd.org Subject: svn commit: r208904 - stable/7/sys/i386/i386 Message-ID: <201006080448.o584maU6094398@svn.freebsd.org>
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Author: alc Date: Tue Jun 8 04:48:36 2010 New Revision: 208904 URL: http://svn.freebsd.org/changeset/base/208904 Log: MFC r208765 In the unlikely event that pmap_ts_referenced() demoted five superpage mappings to the same underlying physical page, the calling thread would be left forever pinned to the same processor. Modified: stable/7/sys/i386/i386/pmap.c Modified: stable/7/sys/i386/i386/pmap.c ============================================================================== --- stable/7/sys/i386/i386/pmap.c Tue Jun 8 04:41:31 2010 (r208903) +++ stable/7/sys/i386/i386/pmap.c Tue Jun 8 04:48:36 2010 (r208904) @@ -4408,7 +4408,7 @@ pmap_ts_referenced(vm_page_t m) rtval++; if (rtval > 4) { PMAP_UNLOCK(pmap); - return (rtval); + goto out; } } } @@ -4437,6 +4437,7 @@ pmap_ts_referenced(vm_page_t m) PMAP_UNLOCK(pmap); } while ((pv = pvn) != NULL && pv != pvf); } +out: sched_unpin(); return (rtval); }
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