Date: Wed, 21 Jan 2009 07:41:24 +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: r187523 - in stable/7/sys: . amd64/amd64 contrib/pf dev/ath/ath_hal dev/cxgb Message-ID: <200901210741.n0L7fODh070343@svn.freebsd.org>
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Author: alc Date: Wed Jan 21 07:41:24 2009 New Revision: 187523 URL: http://svn.freebsd.org/changeset/base/187523 Log: MFC rev 175325 Make pmap_is_prefaultable() more TLB friendly. Specifically, make it use the kernel's direct map instead of the pmap's recursive mapping to access the lowest level in the page table. Modified: stable/7/sys/ (props changed) stable/7/sys/amd64/amd64/pmap.c stable/7/sys/contrib/pf/ (props changed) stable/7/sys/dev/ath/ath_hal/ (props changed) stable/7/sys/dev/cxgb/ (props changed) Modified: stable/7/sys/amd64/amd64/pmap.c ============================================================================== --- stable/7/sys/amd64/amd64/pmap.c Wed Jan 21 07:33:18 2009 (r187522) +++ stable/7/sys/amd64/amd64/pmap.c Wed Jan 21 07:41:24 2009 (r187523) @@ -3091,7 +3091,7 @@ pmap_is_prefaultable(pmap_t pmap, vm_off PMAP_LOCK(pmap); pde = pmap_pde(pmap, addr); if (pde != NULL && (*pde & PG_V)) { - pte = vtopte(addr); + pte = pmap_pde_to_pte(pde, addr); rv = (*pte & PG_V) == 0; } PMAP_UNLOCK(pmap);
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