From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f71.google.com (mail-pa0-f71.google.com [209.85.220.71]) by kanga.kvack.org (Postfix) with ESMTP id 0EE806B0005 for ; Wed, 10 Aug 2016 12:29:13 -0400 (EDT) Received: by mail-pa0-f71.google.com with SMTP id pp5so80725713pac.3 for ; Wed, 10 Aug 2016 09:29:13 -0700 (PDT) Received: from mga09.intel.com (mga09.intel.com. [134.134.136.24]) by mx.google.com with ESMTP id n6si49091563pav.118.2016.08.10.09.29.12 for ; Wed, 10 Aug 2016 09:29:12 -0700 (PDT) Subject: Re: [RFC 11/11] mm, THP, swap: Delay splitting THP during swap out References: <01f101d1f2da$5e943aa0$1bbcafe0$@alibaba-inc.com> <01f201d1f2dc$bd43f750$37cbe5f0$@alibaba-inc.com> <01f301d1f2dd$78df7660$6a9e6320$@alibaba-inc.com> <87eg5w3cpa.fsf@yhuang-mobile.sh.intel.com> From: Dave Hansen Message-ID: <57AB5646.2000906@intel.com> Date: Wed, 10 Aug 2016 09:28:54 -0700 MIME-Version: 1.0 In-Reply-To: <87eg5w3cpa.fsf@yhuang-mobile.sh.intel.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "Huang, Ying" , Hillf Danton Cc: linux-mm@kvack.org On 08/10/2016 07:45 AM, Huang, Ying wrote: > For vm event, I found for now there are only two vm event for swap: > PSWPIN and PSWPOUT. There are counted when page and read from or write > to the block device. So I think we have no existing vm event to count > here. I think the point still stands that we should ensure that we have proper instrumentation to see when huge swap is being used and if/how pages are being split during the process. -- 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