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 (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id o8HDKsB0068699 for ; Fri, 17 Sep 2010 08:20:54 -0500 Subject: Re: [PATCH 0/18] xfs: metadata and buffer cache scalability improvements From: Alex Elder In-Reply-To: <1284461777-1496-1-git-send-email-david@fromorbit.com> References: <1284461777-1496-1-git-send-email-david@fromorbit.com> Date: Fri, 17 Sep 2010 08:21:40 -0500 Message-ID: <1284729700.5524.53.camel@doink> Mime-Version: 1.0 Reply-To: aelder@sgi.com 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 Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Dave Chinner Cc: xfs@oss.sgi.com T24gVHVlLCAyMDEwLTA5LTE0IGF0IDIwOjU1ICsxMDAwLCBEYXZlIENoaW5uZXIgd3JvdGU6Cj4g VGhpcyBwYXRjaHNldCBoYXMgZ3Jvd24gcXVpdGUgYSBiaXQgLSBpdCBzdGFydGVkIG91dCBhcyBh ICJjb252ZXJ0Cj4gdGhlIGJ1ZmZlciBjYWNoZSB0byByYnRyZWVzIiBwYXRjaCwgYW5kIGhhcyBn b3R0ZW4gYmlnZ2VyIGFzIEkKPiBwZWVsZWQgdGhlIG9uaW9uIGZyb20gb25lIGJvdHRsZW5lY2sg dG8gYW5vdGhlci4KCkkga25vdyB5b3UncmUgZ29pbmcgdG8gcmUtc3VibWl0IHRoaXMgc2VyaWVz LiAgSSB3b3VsZApsaWtlIHlvdSB0byBzcGxpdCBpdCBpbnRvIHNldmVyYWwgc21hbGxlciBzZXJp ZXMgaWYgeW91CmRvbid0IG1pbmQuICBTb21lIG9mIHRoZXNlIGFyZSBzaW1wbGVyIHRoYW4gb3Ro ZXJzLAphbmQgdGhlcmUgYXJlIHNvbWUgc29tZXdoYXQgbG9naWNhbCBncm91cGluZ3MgKHlvdQpl dmVuIGRlc2NyaWJlZCB0aGVtIGhlcmUgYXMgdHdvIHNldHMpLiAgQnV0IGJleW9uZAp0aGF0IGl0 IHdvdWxkIGJlIG5pY2UgdG8gZ2V0IGF0IGxlYXN0IHNvbWUgb2YgdGhlbQpjb21taXR0ZWQgYmVm b3JlIHRoZSBmdWxsIHNlcmllcyBpcyBwZXJmZWN0ZWQuCgpUbyBiZSBjb25zdHJ1Y3RpdmUsIGhl cmUncyBhIGdyb3VwaW5nIGJhc2VkIG9uIHdoYXQKc2VlbXMgdG8gYmUgYSBjaGFuZ2Ugb2Ygc2ln bmlmaWNhbmNlIHNvbWVob3cuICBJJ20Kbm90IHN1Z2dlc3RpbmcgdGhleSBhbGwgYmUgc2VwYXJh dGVkLCBidXQgSSdtIGp1c3QKdHJ5aW5nIHRvIGlkZW50aWZ5IHRoZSBtYW55IHRoaW5ncyB5b3Un cmUgZG9pbmcgd2l0aAp0aGlzIHNlcmllcy4gIAoKWzAxLzE4XSB4ZnM6IHNpbmdsZSB0aHJlYWQg aW5vZGUgY2FjaGUgc2hyaW5raW5nLgpbMDIvMThdIHhmczogcmVkdWNlIHRoZSBudW1iZXIgb2Yg Q0lMIGxvY2sgcm91bmQgdHJpcHMgZHVyaW5nIGNvbW1pdAoKWzA1LzE4XSB4ZnM6IGNvbnZlcnQg aW5vZGUgY2FjaGUgbG9va3VwcyB0byB1c2UgUkNVIGxvY2tpbmcKWzA2LzE4XSB4ZnM6IGNvbnZl cnQgcGFnX2ljaV9sb2NrIHRvIGEgc3BpbiBsb2NrCgpbMDcvMThdIHhmczogZG9uJ3QgdXNlIHZm cyB3cml0ZWJhY2sgZm9yIHB1cmUgbWV0YWRhdGEgbW9kaWZpY2F0aW9ucwoKWzA4LzE4XSB4ZnM6 IHJlbmFtZSB4ZnNfYnVmX2dldF9ub2RhZGRyIHRvIGJlIG1vcmUgYXBwcm9wcmlhdGUKWzA5LzE4 XSB4ZnM6IGludHJvZHVjZWQgdW5jYWNoZWQgYnVmZmVyIHJlYWQgcHJpbWl0dmUKWzEwLzE4XSB4 ZnM6IHN0b3JlIHhmc19tb3VudCBpbiB0aGUgYnVmdGFyZyBpbnN0ZWFkIG9mIGluIHRoZSB4ZnNf YnVmClsxMS8xOF0geGZzOiBraWxsIFhCRl9GU19NQU5BR0VEIGJ1ZmZlcnMKWzEyLzE4XSB4ZnM6 IHVzZSB1bmhhc2hlZCBidWZmZXJzIGZvciBzaXplIGNoZWNrcwpbMTMvMThdIHhmczogcmVtb3Zl IGJ1ZnRhcmcgaGFzaCBmb3IgZXh0ZXJuYWwgZGV2aWNlcwoKWzAzLzE4XSB4ZnM6IHJlbW92ZSBk ZWJ1ZyBhc3NlcnQgZm9yIHBlci1hZyByZWZlcmVuY2UgY291bnRpbmcKWzA0LzE4XSB4ZnM6IGxv Y2tsZXNzIHBlci1hZyBsb29rdXBzClsxNC8xOF0geGZzOiBjb252ZXJ0IGJ1ZmZlciBjYWNoZSBo YXNoIHRvIHJidHJlZQoKWzE1LzE4XSB4ZnM7IHBhY2sgeGZzX2J1ZiBzdHJ1Y3R1cmUgbW9yZSB0 aWdodGx5ClsxNi8xOF0geGZzOiBjb252ZXJ0IHhmc2J1ZCBzaHJpbmtlciB0byBhIHBlci1idWZ0 YXJnIHNocmlua2VyLgoKWzE3LzE4XSB4ZnM6IGFkZCBhIGxydSB0byB0aGUgWEZTIGJ1ZmZlciBj YWNoZQpbMTgvMThdIHhmczogc3RvcCB1c2luZyB0aGUgcGFnZSBjYWNoZSB0byBiYWNrIHRoZSBi dWZmZXIgY2FjaGUKClRoYW5rcy4KCgkJCQkJLUFsZXgKCj4gUGVyZm9ybWFuY2UgbnVtYmVycyBo ZXJlIGFyZSA4LXdheSBmc19tYXJrIGNyZWF0ZSB0byA1ME0gZmlsZXMsIGFuZAo+IDgtd2F5IHJt IC1yZiB0byByZW1vdmUgdGhlIGZpbGVzIGNyZWF0ZWQuCj4gCj4gCQkJd2FsbCB0aW1lCWZzX21h cmsgcmF0ZQo+IDIuNi4zNi1yYzQ6Cj4gCWNyZWF0ZToJCTEzbTEwcwkJNjVrIGZpbGUvcwo+IAl1 bmxpbms6CQkyM201OHMJCU4vQQo+IAo+IFRoZSBmaXJzdCBzZXQgb2YgcGF0Y2hlcyBhcmUgZ2Vu ZXJpYyBpbmZyYXN0cnVjdHVyZSBjaGFuZ2VzIHRoYXQKPiBhZGRyZXNzIHBhaW4gcG9pbnRzIHRo ZSByYnRyZWUgYmFzZWQgYnVmZmVyIGNhY2hlIGludHJvZHVjZXMuIEkndmUKPiBwdXQgdGhlbSBm aXJzdCBiZWNhdXNlIHRoZXkgYXJlIHNpbXBsZXIgdG8gcmV2aWV3IGFuZCBoYXZlIGltbWVkaWF0 ZQo+IGltcGFjdCBvbiBwZXJmb3JtYW5jZS4gVGhlc2UgcGF0Y2hlcyBhZGRyZXNzIGxvY2sgY29u dGVudGlvbiBhcwo+IG1lYXN1cmVkIGJ5IHRoZSBrZXJuZWwgbG9ja3N0YXQgaW5mcmFzdHJ1Y3R1 cmUuCj4gCj4geGZzOiBzaW5nbGUgdGhyZWFkIGlub2RlIGNhY2hlIHNocmlua2luZy4KPiAJLSBw cmV2ZW50cyBwZXItYWcgY29udGVudGlvbiBkdXJpbmcgY2FjaGUgc2hyaW5raW5nCj4gCj4geGZz OiByZWR1Y2UgdGhlIG51bWJlciBvZiBDSUwgbG9jayByb3VuZCB0cmlwcyBkdXJpbmcgY29tbWl0 Cj4gCS0gcmVkdWNlcyBsb2NrIHRyYWZmaWMgb24gdGhlIHhjX2NpbF9sb2NrIGJ5IHR3byBvcmRl cnMgb2YKPiAJICBtYWduaXR1ZGUKPiAKPiB4ZnM6IHJlbW92ZSBkZWJ1ZyBhc3NlcnQgZm9yIHBl ci1hZyByZWZlcmVuY2UgY291bnRpbmcKPiB4ZnM6IGxvY2tsZXNzIHBlci1hZyBsb29rdXBzCj4g CS0gaG90dGVzdCBsb2NrIGluIHRoZSBzeXN0ZW0gd2l0aCBidWZmZXIgY2FjaGUgcmJ0cmVlIHBh dGgKPiAJLSBjb252ZXJ0ZWQgdG8gdXNlIFJDVS4KPiAKPiB4ZnM6IGNvbnZlcnQgaW5vZGUgY2Fj aGUgbG9va3VwcyB0byB1c2UgUkNVIGxvY2tpbmcKPiB4ZnM6IGNvbnZlcnQgcGFnX2ljaV9sb2Nr IHRvIGEgc3BpbiBsb2NrCj4gCS0gYWRkcmVzc2VzIGxvb2t1cCB2cyByZWNsYWltIGNvbnRlbnRp b24gb24gcGFnX2ljaV9sb2NrCj4gCS0gY29udmVydGVkIHRvIHVzZSBSQ1UuCj4gCj4geGZzOiBk b24ndCB1c2UgdmZzIHdyaXRlYmFjayBmb3IgcHVyZSBtZXRhZGF0YSBtb2RpZmljYXRpb25zCj4g CS0gaW5vZGUgd3JpdGViYWNrIGRvZXMgbm90IGtlZXAgdXAgd2l0aCBkaXJ0eWluZyAxMDAsMDAw Cj4gCSAgaW5vZGVzIGEgc2Vjb25kLiBBdm9pZHMgdGhlIHN1cGVyYmxvY2sgZGlydHkgbGlzdCB3 aGVyZQo+IAkgIHBvc3NpYmxlIGJ5IHVzaW5nIHRoZSBBSUwgYXMgdGhlIGFnZS1vcmRlciBmbHVz aGVyLgo+IAo+IFBlcmZvcm1hbmNlIHdpdGggdGhlc2UgcGF0Y2hlczoKPiAKPiAyLjYuMzYtcmM0 ICsgc2hyaW5rZXIgKyBDSUwgKyBSQ1U6Cj4gCWNyZWF0ZToJCTExbTM4cwkJODBrIGZpbGVzL3MK PiAJdW5saW5rOgkJMTRtMjlzCQlOL0EKPiAKPiBDcmVhdGUgcmF0ZSBoYXMgaW1wcm92ZWQgYnkg MjAlLCB1bmxpbmsgdGltZSBoYXMgYWxtb3N0IGhhbHZlZC4gT24KPiBsYXJnZSBudW1iZXJzIG9m IGlub2RlcywgdGhlIHVubGluayByYXRlIGltcHJvdmVzIGV2ZW4gbW9yZQo+IGRyYW1hdGljYWxs eS4KPiAKPiBUaGUgYnVmZmVyIGNhY2hlIHRvIHJidHJlZSBzZXJpZXMgY3VycmVudCBzdGFuZHMg YXQ6Cj4gCj4geGZzOiByZW5hbWUgeGZzX2J1Zl9nZXRfbm9kYWRkciB0byBiZSBtb3JlIGFwcHJv cHJpYXRlCj4geGZzOiBpbnRyb2R1Y2VkIHVuY2FjaGVkIGJ1ZmZlciByZWFkIHByaW1pdHZlCj4g eGZzOiBzdG9yZSB4ZnNfbW91bnQgaW4gdGhlIGJ1ZnRhcmcgaW5zdGVhZCBvZiBpbiB0aGUgeGZz X2J1Zgo+IHhmczoga2lsbCBYQkZfRlNfTUFOQUdFRCBidWZmZXJzCj4geGZzOiB1c2UgdW5oYXNo ZWQgYnVmZmVycyBmb3Igc2l6ZSBjaGVja3MKPiB4ZnM6IHJlbW92ZSBidWZ0YXJnIGhhc2ggZm9y IGV4dGVybmFsIGRldmljZXMKPiAJLSBwcmVwYXJhdG9yeSBidWZmZXIgY2FjaGUgQVBJIGNsZWFu dXAgcGF0Y2hlcwo+IAo+IHhmczogY29udmVydCBidWZmZXIgY2FjaGUgaGFzaCB0byByYnRyZWUK PiAJLSB3aGF0IGl0IHNheXMgOykKPiAJLSBpbmNsdWRlcyBjaGFuZ2VzIGJhc2VkIG9uIEFsZXgn cyByZXZpZXcuCj4gCj4geGZzOyBwYWNrIHhmc19idWYgc3RydWN0dXJlIG1vcmUgdGlnaHRseQo+ IAktIG1lbW9yeSB1c2FnZSByZWR1Y3Rpb24sIG1lYW5zIGFkZGluZyB0aGUgTFJVIGxpc3QgaGVh ZCBpcwo+IAkgIGVmZmVjdGl2ZWx5IG1lbW9yeSB1c2FnZSBuZXV0cmFsLgo+IAo+IHhmczogY29u dmVydCB4ZnNidWQgc2hyaW5rZXIgdG8gYSBwZXItYnVmdGFyZyBzaHJpbmtlci4KPiB4ZnM6IGFk ZCBhIGxydSB0byB0aGUgWEZTIGJ1ZmZlciBjYWNoZQo+IAktIEFkZCBhbiBMUlUgZm9yIHJlY2xh aW0KPiAKPiB4ZnM6IHN0b3AgdXNpbmcgdGhlIHBhZ2UgY2FjaGUgdG8gYmFjayB0aGUgYnVmZmVy IGNhY2hlCj4gCS0ga2lsbCBhbGwgdGhlIHBhZ2UgY2FjaGUgY29kZQo+IAo+IDIuNi4zNi1yYzQg KyBzaHJpbmtlciArIENJTCArIFJDVSArIHJidHJlZToKPiAJY3JlYXRlOgkJIDltNDdzCQk5NWsg ZmlsZXMvcwo+IAl1bmxpbms6CQkxNG0xNnMJCU4vQQo+IAo+IENyZWF0ZSByYXRlIGhhcyBpbXBy b3ZlZCBieSBhbm90aGVyIDIwJSwgdW5saW5rIHJhdGUgaGFzIGltcHJvdmVkCj4gbWFyZ2luYWxs eSAobm9pc2UsIHJlYWxseSkuCj4gCj4gVGhlcmUgYXJlIHR3byByZW1haW5pbmcgcGFydHMgdG8g dGhlIGJ1ZmZlciBjYWNoZSBjb252ZXJzaW9uczoKPiAKPiAJMS4gd29yayBvdXQgaG93IHRvIGVm ZmljaWVudGx5IHN1cHBvcnQgYmxvY2sgc2l6ZSBzbWFsbGVyCj4gCXRoYW4gcGFnZSBzaXplLiBU aGUgY3VycmVudCBjb2RlIHdvcmtzLCBidXQgdXNlcyBhIHBhZ2UgcGVyCj4gCXN1Yi1hcGdlIGJ1 ZmZlci4gIEEgc2V0IG9mIHNsYWIgY2FjaGVzIHdvdWxkIGJlIHBlcmZlY3QgZm9yCj4gCXRoaXMg dXNlLCBidXQgSSdtIG5vdCBzdXJlIHRoYXQgd2UgYXJlIGFsbG93ZWQgdG8gdXNlIHRoZW0KPiAJ Zm9yIElPIGFueW1vcmUuIENocmlzdG9waD8KPiAKPiAJMi4gQ29ubmVjdCB1cCB0aGUgYnVmZmVy IHR5cGUgc2VwY2lmaWMgcmVjbGFpbSBwcmlvcml0eQo+IAlyZWZlcmVuY2UgY291bnRpbmcgYW5k IGNvbnZlcnQgdGhlIExSVSByZWNsYWltIHRvIGEgY3Vyc29yCj4gCWJhc2VkIHdhbGsgdGhhdCBz aW1wbHkgZHJvcHMgcmVjbGFpbSByZWZlcmVuY2UgY291bnRzIGFuZAo+IAlmcmVlcyBhbnl0aGlu ZyB0aGF0IGhhcyBhIHplcm8gcmVjbGFpbSByZWZlcmVuY2UuCj4gCj4gT3ZlcmFsbCwgSSBjYW4g c3dhcCB0aGUgb3JkZXIgb2YgdGhlIHR3byBwYXRjaCBzZXRzLCBhbmQgdGhlCj4gaW5jcmVtZW50 YWwgcGVyZm9ybWFuY2UgaW5jcmVhc2VzIGZvciBjcmVhdGUgYXJlIHByZXR0eSBtdWNoCj4gaWRl bnRpY2FsLiBGb3IgdW5saW5rLCB0ZSBiZW5lZml0IGNvbWVzIGZyb20gdGhlIHNocmlua2VyCj4g bW9kaWZpY2F0aW9uLiBGb3IgdGhvc2UgdGhhdCBjYXJlLCB0aGUgcmJ0cmVlIHBhdGNoIHNldCBp biBpc29sYXRpb24KPiByZXN1bHRzIGluIGEgdGltZSBvZiA0aDM4bSB0byBjcmVhdGUgMSBiaWxs aW9uIGlub2RlcyBvbiBteSA4cC80R0IKPiBSQU0gdGVzdCBWTS4gSSBoYXZlbid0IHJ1biB0aGlz IHRlc3Qgd2l0aCB0aGUgUkNVIGFuZCB3cml0ZWJhY2sKPiBtb2RpZmljYXRpb25zIHlldC4KPiAK PiBNb3Zpbmcgb24gZnJvbSB0aGlzIHBvaW50IGlzIHRvIHN0YXJ0IHRlc3RpbmcgYWdhaW5zdCBO aWNrIFBpZ2dpbidzCj4gVkZTIHNjYWxhYmlsaXR5IHRyZWUsIGHRlSB0aGUgaW5vZGVfbG9jayBh bmQgZGNhY2hlX2xvY2sgYXJlIG5vdyB0aGUKPiBwZXJmb3JtYW5jZSBsaW1pdGluZyBmYWN0b3Jz LiBUaGF0IHdpbGwsIHdpdGhvdXQgZG91YnQsIGJyaW5nIG5ldwo+IGhvdHNwb3RzIG91dCBpbiBY RlMgc28gSSdsbCBiZSBzdGFydGluZyB0aGlzIGN5Y2xlIG92ZXIgYWdhaW4gc29vbi4KPiAKPiBP dmVyYWxsIGRpZmZzdGF0IGF0IHRoaXMgcG9pbnQgaXM6Cj4gCj4gIGZzL3hmcy9saW51eC0yLjYv a21lbS5oICAgICAgICB8ICAgIDEgKwo+ICBmcy94ZnMvbGludXgtMi42L3hmc19idWYuYyAgICAg fCAgNTg4ICsrKysrKysrKysrKysrLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0KPiAgZnMveGZz L2xpbnV4LTIuNi94ZnNfYnVmLmggICAgIHwgICA2MSArKystLQo+ICBmcy94ZnMvbGludXgtMi42 L3hmc19pb3BzLmMgICAgfCAgIDE4ICstCj4gIGZzL3hmcy9saW51eC0yLjYveGZzX3N1cGVyLmMg ICB8ICAgMTEgKy0KPiAgZnMveGZzL2xpbnV4LTIuNi94ZnNfc3luYy5jICAgIHwgICA0OSArKyst Cj4gIGZzL3hmcy9saW51eC0yLjYveGZzX3RyYWNlLmggICB8ICAgIDIgKy0KPiAgZnMveGZzL3F1 b3RhL3hmc19xbV9zeXNjYWxscy5jIHwgICAgNCArLQo+ICBmcy94ZnMveGZzX2FnLmggICAgICAg ICAgICAgICAgfCAgICA5ICstCj4gIGZzL3hmcy94ZnNfYnVmX2l0ZW0uYyAgICAgICAgICB8ICAg IDMgKy0KPiAgZnMveGZzL3hmc19mc29wcy5jICAgICAgICAgICAgIHwgICAxMSArLQo+ICBmcy94 ZnMveGZzX2lnZXQuYyAgICAgICAgICAgICAgfCAgIDQ2ICsrKy0KPiAgZnMveGZzL3hmc19pbm9k ZS5jICAgICAgICAgICAgIHwgICAyMiArLQo+ICBmcy94ZnMveGZzX2lub2RlX2l0ZW0uYyAgICAg ICAgfCAgICA5IC0KPiAgZnMveGZzL3hmc19sb2cuYyAgICAgICAgICAgICAgIHwgICAgMyArLQo+ ICBmcy94ZnMveGZzX2xvZ19jaWwuYyAgICAgICAgICAgfCAgMTE2ICsrKysrLS0tLQo+ICBmcy94 ZnMveGZzX2xvZ19yZWNvdmVyLmMgICAgICAgfCAgIDE4ICstCj4gIGZzL3hmcy94ZnNfbW91bnQu YyAgICAgICAgICAgICB8ICAxMjYgKysrKy0tLS0tCj4gIGZzL3hmcy94ZnNfbW91bnQuaCAgICAg ICAgICAgICB8ICAgIDIgKwo+ICBmcy94ZnMveGZzX3J0YWxsb2MuYyAgICAgICAgICAgfCAgIDI5 ICstCj4gIGZzL3hmcy94ZnNfdm5vZGVvcHMuYyAgICAgICAgICB8ICAgIDIgKy0KPiAgMjEgZmls ZXMgY2hhbmdlZCwgNTAyIGluc2VydGlvbnMoKyksIDYyOCBkZWxldGlvbnMoLSkKPiAKPiBTbyBp dCBpcyBpbXByb3ZpbmcgcGVyZm9ybWFuY2UsIHJlbW92aW5nIGNvZGUgYW5kIGZpeGluZwo+IGxv bmdzdGFuZGluZyBidWdzIGFsbCBhdCB0aGUgc2FtZSB0aW1lLiA7KQo+IAo+IF9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCj4geGZzIG1haWxpbmcgbGlzdAo+ IHhmc0Bvc3Muc2dpLmNvbQo+IGh0dHA6Ly9vc3Muc2dpLmNvbS9tYWlsbWFuL2xpc3RpbmZvL3hm cwoKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwp4ZnMg bWFpbGluZyBsaXN0Cnhmc0Bvc3Muc2dpLmNvbQpodHRwOi8vb3NzLnNnaS5jb20vbWFpbG1hbi9s aXN0aW5mby94ZnMK