From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx126.postini.com [74.125.245.126]) by kanga.kvack.org (Postfix) with SMTP id CBEEB6B0074 for ; Thu, 16 Aug 2012 14:37:00 -0400 (EDT) Date: Thu, 16 Aug 2012 21:37:25 +0300 From: "Kirill A. Shutemov" Subject: Re: [PATCH v3 6/7] mm: make clear_huge_page cache clear only around the fault address Message-ID: <20120816183725.GA30284@shutemov.name> References: <1345130154-9602-1-git-send-email-kirill.shutemov@linux.intel.com> <1345130154-9602-7-git-send-email-kirill.shutemov@linux.intel.com> <20120816161647.GM11188@redhat.com> <20120816164356.GA30106@shutemov.name> <20120816182944.GN11188@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120816182944.GN11188@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrea Arcangeli Cc: "Kirill A. Shutemov" , linux-mm@kvack.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, Andi Kleen , Tim Chen , Alex Shi , Jan Beulich , Robert Richter , Andy Lutomirski , Andrew Morton , Johannes Weiner , Hugh Dickins , KAMEZAWA Hiroyuki , Mel Gorman , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mips@linux-mips.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org On Thu, Aug 16, 2012 at 08:29:44PM +0200, Andrea Arcangeli wrote: > On Thu, Aug 16, 2012 at 07:43:56PM +0300, Kirill A. Shutemov wrote: > > Hm.. I think with static_key we can avoid cache overhead here. I'll try. > > Could you elaborate on the static_key? Is it some sort of self > modifying code? Runtime code patching. See Documentation/static-keys.txt. We can patch it on sysctl. > > > Thanks, for review. Could you take a look at huge zero page patchset? ;) > > I've noticed that too, nice :). I'm checking some detail on the > wrprotect fault behavior but I'll comment there. > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@kvack.org. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: email@kvack.org -- Kirill A. Shutemov -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org