From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751177AbXBNEaL (ORCPT ); Tue, 13 Feb 2007 23:30:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751231AbXBNEaL (ORCPT ); Tue, 13 Feb 2007 23:30:11 -0500 Received: from smtp-out.google.com ([216.239.45.13]:6106 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751177AbXBNEaJ (ORCPT ); Tue, 13 Feb 2007 23:30:09 -0500 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=received:date:from:x-x-sender:to:cc:subject:message-id: mime-version:content-type; b=dUAU6m0orsxdoB1rVk2fAJFArzwKd0GuSDtSi/FZUaLd4fyA81QsRtkyTZJTmxNni IQdo9xSETVNqykSMF9E4g== Date: Tue, 13 Feb 2007 20:29:54 -0800 (PST) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Andrew Morton cc: Paul Mundt , Christoph Lameter , linux-kernel@vger.kernel.org Subject: [patch -mm] smaps: flush tlb only once for each vma Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Flush the entire user address space from the TLB for each VMA in the task_struct list when clearing reference bits with /proc/pid/clear_refs. It's more efficient than flushing each page individually depending on pte_young(). Cc: Paul Mundt Cc: Christoph Lameter Signed-off-by: David Rientjes --- fs/proc/task_mmu.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -276,7 +276,6 @@ static void clear_refs_one_pmd(struct vm_area_struct *vma, pmd_t *pmd, if (pte_young(ptent)) { ptent = pte_mkold(ptent); set_pte_at(vma->vm_mm, addr, pte, ptent); - flush_tlb_page(vma, addr); } ClearPageReferenced(page); } @@ -358,6 +357,7 @@ void clear_refs_smap(struct mm_struct *mm) for (vma = mm->mmap; vma; vma = vma->vm_next) if (vma->vm_mm && !is_vm_hugetlb_page(vma)) for_each_pmd(vma, clear_refs_one_pmd, NULL); + flush_tlb_mm(mm); up_read(&mm->mmap_sem); }