Date: Sun, 10 Oct 2004 19:08:00 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/amd64/amd64 pmap.c src/sys/amd64/include pmap.h src/sys/i386/i386 pmap.c src/sys/i386/include pmap.h Message-ID: <200410101908.i9AJ80pj096434@repoman.freebsd.org>
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alc 2004-10-10 19:08:00 UTC FreeBSD src repository Modified files: (Branch: RELENG_5) sys/amd64/amd64 pmap.c sys/amd64/include pmap.h sys/i386/i386 pmap.c sys/i386/include pmap.h Log: MFC multiple pmap changes amd64 and i386 - Remove unnecessary checks for curthread == NULL and pmap == NULL. - Release the page queues lock earlier in pmap_protect() and pmap_remove() in order to reduce contention. - Remove an outdated assertion from _pmap_allocpte(). - Simplify the reference counting of page table pages. Specifically, use the page table page's wired count rather than its hold count to contain the reference count. - Prevent the unexpected deallocation of a page table page while performing pmap_copy(). - Eliminate the unnecessary masking of the page offset bits from the physical address that is stored in the vm_page. - Undo revision 1.251. This change was a performance pessimizing work- around that is no longer required. Now, if the preexisting PTE is invalid, pmap_enter() does not call pmap_invalidate_page() to update the TLB(s). - Make pte_load_store() an atomic operation in all cases, not just i386 PAE. - Restructure pmap_enter() to prevent the loss of a page modified (PG_M) bit in a race between processors. (This restructuring assumes the newly atomic pte_load_store() for correct operation.) amd64 only - It is now an error to call pmap_unuse_pt without the paddr of the pde that contained the pte. - Remove an unused declaration. i386 only - Modify pmap_pte() to support its use on non-current, non-kernel pmaps without holding Giant. Approved by: re (scottl) Revision Changes Path 1.491.2.4 +88 -90 src/sys/amd64/amd64/pmap.c 1.122.2.2 +15 -5 src/sys/amd64/include/pmap.h 1.494.2.6 +99 -81 src/sys/i386/i386/pmap.c 1.112.2.2 +17 -5 src/sys/i386/include/pmap.h
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