From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id 93D468034 for ; Mon, 4 Mar 2013 00:14:08 -0600 (CST) Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by relay2.corp.sgi.com (Postfix) with ESMTP id 812B3304032 for ; Sun, 3 Mar 2013 22:14:05 -0800 (PST) Received: from mx4-phx2.redhat.com (mx4-phx2.redhat.com [209.132.183.25]) by cuda.sgi.com with ESMTP id LWXlFGhJYx2Gfhf2 for ; Sun, 03 Mar 2013 22:14:04 -0800 (PST) Date: Mon, 4 Mar 2013 01:14:02 -0500 (EST) From: CAI Qian Message-ID: <1735762055.8552410.1362377642444.JavaMail.root@redhat.com> In-Reply-To: <20130304055502.GP23616@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: xfs@oss.sgi.com CgotLS0tLSDljp/lp4vpgq7ku7YgLS0tLS0KPiDlj5Hku7bkuro6ICJEYXZlIENoaW5uZXIiIDxk YXZpZEBmcm9tb3JiaXQuY29tPgo+IOaUtuS7tuS6ujogIkNBSSBRaWFuIiA8Y2FpcWlhbkByZWRo YXQuY29tPgo+IOaKhOmAgTogeGZzQG9zcy5zZ2kuY29tCj4g5Y+R6YCB5pe26Ze0OiDmmJ/mnJ/k uIAsIDIwMTPlubQgMyDmnIggMDTml6Ug5LiL5Y2IIDE6NTU6MDIKPiDkuLvpopg6IFJlOiBwb3Nz aWJsZSBmc3luYzAyKCkgeGZzIHNsb3duZXNzIHJlZ3Jlc3Npb24gb24gcG93ZXI3Cj4gCj4gT24g U3VuLCBNYXIgMDMsIDIwMTMgYXQgMTE6MjM6MjZQTSAtMDUwMCwgQ0FJIFFpYW4gd3JvdGU6Cj4g PiAKPiA+ID4gPiBBbmQgdGhpcyBjb21taXQgaW4gMy45LXJjMToKPiA+ID4gPiAKPiA+ID4gPiBh MWUxNmMyIHhmczogbGltaXQgc3BlY3VsYXRpdmUgcHJlYWxsb2Mgc2l6ZSBvbiBzcGFyc2UgZmls ZXMKPiA+ID4gPiBzaG91bGQgZml4IHRoZSBwcm9ibGVtLiBQbGVhc2UgY29uZmlybSB0aGVzZSBj b21taXRzIGFyZSB0aGUKPiA+ID4gPiBjYXVzZQo+ID4gPiA+IGFuZCB0aGUgZml4IHJlc3BlY3Rp dmVseS4uLi4KPiA+IENvbmZpcm1lZCB0aGlzIGZpeGVkIHRoZSBwcm9ibGVtLiBJJ2QgbGlrZSB0 byByZXF1ZXN0IHRoaXMgdG8gYmUKPiA+IGJhY2stcG9ydGVkCj4gPiB0byBzdGFibGUtMy4wLCBz dGFibGUtMy40IGFuZCBzdGFibGUtMy44LiBXaGF0IGRvIHlvdSB0aGluaz8KPiAKPiBJTU8sIG5v LCBpdCBpcyBub3QgYSBiYWNrcG9ydCBjYW5kaWRhdGUuICBUaGUgcGF0Y2ggaGFzIHF1aXRlIGEg ZmV3Cj4gZGVwZW5kZW5jaWVzLCBhbmQgYXQgbGVhc3QgZm9yIDMuMCB4ZnNfYm1hcGlfcmVhZCgp IGRvZXNuJ3QgZXhpc3QKPiBhbmQgaGVuY2UgaXMgbm90IGEgdHJpdmlhbCBiYWNrcG9ydC4KSXQg aXMgZmluZSB0byBza2lwIHRoZSAzLjAgdGhlbiwgYnV0IHRoZSBvdGhlciBzdGFibGUgYnJhbmNo ZXMgY2FuIGJlIGFwcGxpZWQKYXMgaXQgaWlzIGFuZCBidWlsZCBmaW5lLgo+IAo+IEZ1cnRoZXIs IGl0J3MgdGFrZSAyIHllYXJzIGZvciB0aGlzIHRvIGJlIG5vdGljZWQsIGFuZCB5b3UgaGF2ZW4n dAo+IGV4cGxhaW5lZCB3aHkgdGhlIHByb2JsZW0gZXhpc3RzIG9uIHlvdXIgcG93ZXIgbWFjaGlu ZSBhbmQgbm90IGFueQo+IG90aGVycyB0aGF0IGl0IGhhcyBiZWVuIHRlc3RlZCBvbi4gQW5kIHRo ZXJlJ3MgYmVlbiB2ZXJ5IGZldwo+IGNvbXBsYWludHMgYWJvdXQgcGVyZm9ybWFuY2Ugb2Ygc3Vj aCB3b3JrbG9hZHMgb3ZlciB0aGUgcGFzdCAyCj4geWVhcnMsIHNvIGVpdGhlciB0aGUgd29ya2xv YWQgaXMgbm90IGltcG9ydGFudCBvciBvbmx5IHlvdXIgcG93ZXI3Cj4gbWFjaGluZSBpcyBoYXZp bmcgcHJvYmxlbXMuCkhtbSwgaXQgY291bGQgYWxzbyBiZSBwb3NzaWJsZSB0aGF0IGl0IHdhcyBl YXN5IHRvIHJlcHJvZHVjZSBub3cgd2l0aCB0aGUKbmV3IGtlcm5lbCBwbHVzIG5ldyB1c2VyLXNw YWNlcyBhcyB3ZWxsIHRoZSBuZXcgY29tcGlsZXIuIEFsc28sIHRob3NlIHN5c3RlbXMKc3RhcnRl ZCB0byBzd2l0Y2ggdG8gdXNlIFhGUyBhcyByb290IHBhcnRpdGlvbnMgZnJvbSBleHQ0IG9ubHkg cmVjZW50bHksCnNvIHdlIGhhdmUgbmV2ZXIgbm90aWNlZCB0aGlzIGluIHRoZSBwYXN0IHdoZW4g cnVubmluZyB0aG9zZSBMVFAgdGVzdHMuClhGUyBjb3VsZCBhbHNvIGJlY29tZSBtb3JlIHBvcHVs YXIgdGhhbiAyLXllYXIgYWdvLiA6KQo+IAo+IEhlbmNlIEkgZG9uJ3Qgc2VlIGFueSBuZWVkIHRv IGJhY2sgcG9ydCBpdCAtIGl0J3Mgbm90IGEgY3JpdGljYWwgZml4Cj4gYW5kIHZlcnkgZmV3IHBl b3BsZSBzZWUgdGhlIHByb2JsZW0gc28gdGhlcmUncyBubyByZWFsIG5lZWQgdG8gZG8KPiB0aGUg YmFja3BvcnQuICBNYXliZSBzb21lb25lIGVsc2UgaGFzIHRoZSB0aW1lIGFuZCByZXNvdXJjZXMg dG8KPiB3YXN0ZSBvbiBiYWNrcG9ydGluZyBub24tY3JpdGljYWwgZml4ZXMgdG8gc3RhYmxlIGtl cm5lbHMsIGJ1dCBJCj4gZG9uJ3QuLi4uCkkgaGF2ZSB0aW1lIHNvIEkgY2FuIGRvIHRoZSBiYWNr LXBvcnQgZm9yIHlvdSBndXlzIHRvIHJldmlldyBpZiB5b3UKZG9uJ3QgbWluZC4gVGhhbmtzIGZv ciB5b3VyIHRpbWUuCj4gCj4gQ2hlZXJzLAo+IAo+IERhdmUuCj4gLS0KPiBEYXZlIENoaW5uZXIK PiBkYXZpZEBmcm9tb3JiaXQuY29tCj4gCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fXwp4ZnMgbWFpbGluZyBsaXN0Cnhmc0Bvc3Muc2dpLmNvbQpodHRwOi8v b3NzLnNnaS5jb20vbWFpbG1hbi9saXN0aW5mby94ZnMK