Date: Thu, 3 Jun 2010 03:55:23 +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: r208765 - head/sys/i386/i386 Message-ID: <201006030355.o533tNrY058320@svn.freebsd.org>
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Author: alc Date: Thu Jun 3 03:55:22 2010 New Revision: 208765 URL: http://svn.freebsd.org/changeset/base/208765 Log: 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. MFC after: 3 days Modified: head/sys/i386/i386/pmap.c Modified: head/sys/i386/i386/pmap.c ============================================================================== --- head/sys/i386/i386/pmap.c Thu Jun 3 02:24:53 2010 (r208764) +++ head/sys/i386/i386/pmap.c Thu Jun 3 03:55:22 2010 (r208765) @@ -4540,7 +4540,7 @@ pmap_ts_referenced(vm_page_t m) rtval++; if (rtval > 4) { PMAP_UNLOCK(pmap); - return (rtval); + goto out; } } } @@ -4569,6 +4569,7 @@ 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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