Date: Sun, 19 Feb 2017 20:40:07 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r313966 - head/sys/arm/arm Message-ID: <201702192040.v1JKe7d6080995@repo.freebsd.org>
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Author: kib Date: Sun Feb 19 20:40:07 2017 New Revision: 313966 URL: https://svnweb.freebsd.org/changeset/base/313966 Log: MFamd64 r313933: microoptimize pmap_protect_pte1(). Noted by: alc Tested by: mmel Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/sys/arm/arm/pmap-v6.c Modified: head/sys/arm/arm/pmap-v6.c ============================================================================== --- head/sys/arm/arm/pmap-v6.c Sun Feb 19 20:35:39 2017 (r313965) +++ head/sys/arm/arm/pmap-v6.c Sun Feb 19 20:40:07 2017 (r313966) @@ -4799,12 +4799,11 @@ pmap_protect_pte1(pmap_t pmap, pt1_entry ("%s: sva is not 1mpage aligned", __func__)); opte1 = npte1 = pte1_load(pte1p); - if (pte1_is_managed(opte1)) { + if (pte1_is_managed(opte1) && pte1_is_dirty(opte1)) { eva = sva + PTE1_SIZE; for (va = sva, m = PHYS_TO_VM_PAGE(pte1_pa(opte1)); va < eva; va += PAGE_SIZE, m++) - if (pte1_is_dirty(opte1)) - vm_page_dirty(m); + vm_page_dirty(m); } if ((prot & VM_PROT_WRITE) == 0) npte1 |= PTE1_RO | PTE1_NM;
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