From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from westrelay02.boulder.ibm.com (westrelay02.boulder.ibm.com [9.17.195.11]) by e33.co.us.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id k5RLpWV7004604 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL) for ; Tue, 27 Jun 2006 17:51:32 -0400 Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168]) by westrelay02.boulder.ibm.com (8.13.6/NCO/VER7.0) with ESMTP id k5RLp08S241872 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 27 Jun 2006 15:51:01 -0600 Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1]) by d03av02.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id k5RLpV4g013347 for ; Tue, 27 Jun 2006 15:51:32 -0600 Subject: RE: slow hugetlb from 2.6.15 From: Dave Hansen In-Reply-To: <000001c69a1f$2171af00$e234030a@amr.corp.intel.com> References: <000001c69a1f$2171af00$e234030a@amr.corp.intel.com> Content-Type: text/plain Date: Tue, 27 Jun 2006 14:51:13 -0700 Message-Id: <1151445073.24103.37.camel@localhost.localdomain> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: "Chen, Kenneth W" Cc: 'Badari Pulavarty' , stanojr@blackhole.websupport.sk, linux-mm List-ID: On Tue, 2006-06-27 at 12:23 -0700, Chen, Kenneth W wrote: > Though it is a mystery to > see that faulting on hugetlb page is significantly longer than > faulting a > normal page. There's an awful lot more data to zero when allocating a page which is 1000 times bigger. It would be really interesting to see kernel profiles, but my money is on clear_huge_page(). -- Dave -- 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