Date: Mon, 9 Mar 2009 03:35:25 +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: r189551 - head/sys/amd64/amd64 Message-ID: <200903090335.n293ZPgA008336@svn.freebsd.org>
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Author: alc Date: Mon Mar 9 03:35:25 2009 New Revision: 189551 URL: http://svn.freebsd.org/changeset/base/189551 Log: Change pmap_enter_quick_locked() so that it uses the kernel's direct map instead of the pmap's recursive mapping to access the lowest level of the page table when it maps a user-space virtual address. Modified: head/sys/amd64/amd64/pmap.c Modified: head/sys/amd64/amd64/pmap.c ============================================================================== --- head/sys/amd64/amd64/pmap.c Mon Mar 9 02:37:52 2009 (r189550) +++ head/sys/amd64/amd64/pmap.c Mon Mar 9 03:35:25 2009 (r189551) @@ -3253,17 +3253,12 @@ pmap_enter_quick_locked(pmap_t pmap, vm_ return (mpte); } } + pte = (pt_entry_t *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(mpte)); + pte = &pte[pmap_pte_index(va)]; } else { mpte = NULL; + pte = vtopte(va); } - - /* - * This call to vtopte makes the assumption that we are - * entering the page into the current pmap. In order to support - * quick entry into any pmap, one would likely use pmap_pte. - * But that isn't as quick as vtopte. - */ - pte = vtopte(va); if (*pte) { if (mpte != NULL) { mpte->wire_count--;
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