From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (Postfix) with ESMTP id 761D37FAB for ; Fri, 1 Mar 2013 03:20:33 -0600 (CST) Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by relay3.corp.sgi.com (Postfix) with ESMTP id 08B8CAC002 for ; Fri, 1 Mar 2013 01:20:29 -0800 (PST) Received: from mx3-phx2.redhat.com (mx3-phx2.redhat.com [209.132.183.24]) by cuda.sgi.com with ESMTP id ipolb2r5VtKvGM0z for ; Fri, 01 Mar 2013 01:20:27 -0800 (PST) Date: Fri, 1 Mar 2013 04:20:18 -0500 (EST) From: CAI Qian Message-ID: <220575861.7590457.1362129618880.JavaMail.root@redhat.com> In-Reply-To: <20130228115410.GN5551@dastard> Subject: Re: possible fsync02() xfs slowness regression on power7 MIME-Version: 1.0 List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: Dave Chinner Cc: Steve Best , xfs@oss.sgi.com CgotLS0tLSDljp/lp4vpgq7ku7YgLS0tLS0KPiDlj5Hku7bkuro6ICJEYXZlIENoaW5uZXIiIDxk YXZpZEBmcm9tb3JiaXQuY29tPgo+IOaUtuS7tuS6ujogIkNBSSBRaWFuIiA8Y2FpcWlhbkByZWRo YXQuY29tPgo+IOaKhOmAgTogeGZzQG9zcy5zZ2kuY29tLCAiU3RldmUgQmVzdCIgPHNiZXN0QHJl ZGhhdC5jb20+Cj4g5Y+R6YCB5pe26Ze0OiDmmJ/mnJ/lm5ssIDIwMTPlubQgMiDmnIggMjjml6Ug 5LiL5Y2IIDc6NTQ6MTAKPiDkuLvpopg6IFJlOiBwb3NzaWJsZSBmc3luYzAyKCkgeGZzIHNsb3du ZXNzIHJlZ3Jlc3Npb24gb24gcG93ZXI3Cj4gCj4gT24gVGh1LCBGZWIgMjgsIDIwMTMgYXQgMDQ6 Mjg6MzVBTSAtMDUwMCwgQ0FJIFFpYW4gd3JvdGU6Cj4gPiBUaGlzIExUUCB0ZXN0IHN0YXJ0aW5n IHRvIGZhaWwgdXNpbmcgdGhlIGxhdGVzdCB1cHN0cmVhbSBrZXJuZWwgb24KPiA+IG9uZSBvZiB0 aGUgcG93ZXI3Cj4gPiBzeXN0ZW1zIGhlcmUsIGh0dHA6Ly90aW55dXJsLmNvbS9ibmd3b3VqCj4g PiAKPiA+ICMgLi9mc3luYzAyCj4gPiBmc3luYzAyICAgICAxICBURkFJTCAgOiAgZnN5bmMgdG9v ayB0b28gbG9uZzogMjUyLjAwMDAwMCBzZWNvbmRzOwo+ID4gbWF4X2Jsb2NrOiAyMTQKPiA+IAo+ ID4gV2hlbiBpdCBpcyB3b3JraW5nLCB0aGUgdGVzdCBpcyBhbG1vc3QgcmV0dXJuZWQgaW1tZWRp YXRlbHkuIFRoZQo+ID4gYmlzZWN0aW5nIHNvIGZhcgo+ID4gaW5kaWNhdGVkIHRoYXQgb25lIG9y IGEgZmV3IG9mIHRoZSBmb2xsb3dpbmcgY291bGQgYmUgY3VscHJpdHMuCj4gPiAKPiA+ICMgZ2l0 IGxvZyAtLXByZXR0eT1vbmVsaW5lCj4gPiA0OThmN2Y1MDVkYzc5OTM0Yzg3OGM3NjY3ODQwYzUw YzY0ZjIzMmZjLi5iMTk5YzhhNGJhMTE4NzlkZjg3ZGFhZDQ5NmNlZWU0MWZkYzZhYTgyCj4gCj4g VGhleSBhcmUgYWxsIHBhdGNoZXMgY29tbWl0dGVkIG1vcmUgdGhhbiAyIHllYXJzIGFnbywgYW5k IG5vbmUgb2YKPiB0aGVtIGFyZSBwbGF0Zm9ybSBzcGVjaWZpYy4gVGhpcyBzb3VuZHMgbW9yZSBs aWtlIGEgbWFjaGluZSBzcGVjaWZpYwo+IGlzc3VlIHRoYW4gYSBwbGF0Zm9ybSBzcGVjaWZpYyBw cm9ibGVtIChpLmUuIGxvdHMgb2YgUkFNLCBzbG93LAo+IHNsb3cgZGlzaykuCj4gCj4gSW4gZnV0 dXJlIHdoZW4gcmVwb3J0aW5nIGEgYnVnLCBwbGVhc2UgdGVsbCB1c2UgaGFyZHdhcmUgeW91IGFy ZQo+IHVzaW5nIGFzIHBlcjoKPiAKPiBodHRwOi8veGZzLm9yZy9pbmRleC5waHAvWEZTX0ZBUSNR Ol9XaGF0X2luZm9ybWF0aW9uX3Nob3VsZF9JX2luY2x1ZGVfd2hlbl9yZXBvcnRpbmdfYV9wcm9i bGVtLjNGCj4gCj4gR2l2ZW4gdGhhdCB0aGlzIGlzIGEgc3BhcnNlIGZpbGUgdGVzdCB0aGF0IHJl cGVhdGVkbHkgZXh0ZW5kcyB0aGUKPiBmaWxlLCB0aGlzIGlzIHRoZSBsaWtlbHkgY3VscHJpdDoK PiAKPiA+IDA1NTM4OGEzMTg4ZjU2Njc2YzIxZTkyOTYyZmMzNjZhYzhiNWNiNzIgeGZzOiBkeW5h bWljIHNwZWN1bGF0aXZlCj4gPiBFT0YgcHJlYWxsb2NhdGlvbgpZZXMsIHlvdSBhcmUgcmlnaHQs IGp1c3QgY29uZmlybWVkIGl0LiBOaWNlIGNhdGNoIQo+IAo+IEFuZCB0aGlzIGNvbW1pdCBpbiAz LjktcmMxOgo+IAo+IGExZTE2YzIgeGZzOiBsaW1pdCBzcGVjdWxhdGl2ZSBwcmVhbGxvYyBzaXpl IG9uIHNwYXJzZSBmaWxlcwpKdXN0IGJhY2stcG9ydGVkIGl0IGFuZCBydW5uaW5nIGF0IHRoZSBt b21lbnQgYW5kIHdpbGwgbGV0IHlvdSBrbm93LiBUaGFua3MgRGF2ZS4KPiAKPiBzaG91bGQgZml4 IHRoZSBwcm9ibGVtLiBQbGVhc2UgY29uZmlybSB0aGVzZSBjb21taXRzIGFyZSB0aGUgY2F1c2UK PiBhbmQgdGhlIGZpeCByZXNwZWN0aXZlbHkuLi4uCj4gCj4gQ2hlZXJzLAo+IAo+IERhdmUuCj4g LS0KPiBEYXZlIENoaW5uZXIKPiBkYXZpZEBmcm9tb3JiaXQuY29tCj4gCgpfX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwp4ZnMgbWFpbGluZyBsaXN0Cnhmc0Bv c3Muc2dpLmNvbQpodHRwOi8vb3NzLnNnaS5jb20vbWFpbG1hbi9saXN0aW5mby94ZnMK