From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id p4U3lkEk219007 for ; Sun, 29 May 2011 22:47:46 -0500 Received: from ipmail06.adl6.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4F7C9166B333 for ; Sun, 29 May 2011 20:47:44 -0700 (PDT) Received: from ipmail06.adl6.internode.on.net (ipmail06.adl6.internode.on.net [150.101.137.145]) by cuda.sgi.com with ESMTP id FnnHqGua5iMD8oGf for ; Sun, 29 May 2011 20:47:44 -0700 (PDT) Date: Mon, 30 May 2011 13:47:41 +1000 From: Dave Chinner Subject: Re: [regression, 3.0-rc1] dentry cache growth during unlinks, XFS performance way down Message-ID: <20110530034741.GD561@dastard> References: <20110530020604.GC561@dastard> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20110530020604.GC561@dastard> 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: linux-kernel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, xfs@oss.sgi.com T24gTW9uLCBNYXkgMzAsIDIwMTEgYXQgMTI6MDY6MDRQTSArMTAwMCwgRGF2ZSBDaGlubmVyIHdy b3RlOgo+IEZvbGtzLAo+IAo+IEkganVzdCBib290ZWQgdXAgYSAzLjAtcmMxIGtlcm5lbCwgYW5k IG1vdW50ZWQgYW4gWEZTIGZpbGVzeXN0ZW0KPiB3aXRoIDUwTSBmaWxlcyBpbiBpdC4gUnVubmlu ZzoKPiAKPiAkIGZvciBpIGluIC9tbnQvc2NyYXRjaC8qOyBkbyBzdWRvIC91c3IvYmluL3RpbWUg cm0gLXJmICRpIDI+JjEgJiBkb25lCj4gCj4gcnVucyBhbiA4LXdheSBwYXJhbGxlbCB1bmxpbmsg b24gdGhlIGZpbGVzLiBOb3JtYWxseSB0aGlzIHJ1bnMgYXQKPiBhcm91bmQgODBrIHVubGlua3Mv cywgYW5kIGl0IHJ1bnMgd2l0aCBhYm91dCA1MDBrLTFtIGRlbnRyaWVzIGFuZAo+IGlub2RlcyBj YWNoZWQgaW4gdGhlIHN0ZWFkeSBzdGF0ZS4KPiAKPiBUaGUgc3RlYWR5IHN0YXRlIGJlaGF2aW91 ciB3aXRoIDMuMC1yYzEgaXMgdGhhdCB0aGVyZSBhcmUgYXJvdW5kIDEwbQo+IGNhY2hlZCBkZW50 cmllcyAtIGFsbCBuZWdhdGl2ZSBkZW50cmllcyAtIGNvbnN1bWluZyBhYm91dCAxLjZHQiBvZgo+ IFJBTSAob2YgNEdCIHRvdGFsKS4gUHJldmlvdXMgc3RlYWR5IHN0YXRlIHdhcywgSUlSQywgYXJv dW5kIDIwME1CIG9mCj4gZGVudHJpZXMuIE15IGluaXRpYWwgc3VzcGljaW9ucyBhcmUgdGhhdCB0 aGUgZGVudHJ5IHVuaGFzaGluZwo+IGNoYW5nZdGVIG1heSBiZSB0aGUgY2F1c2Ugb2YgdGhpcy4u LgoKU28gYSBiaXNlY3QgbGFuZHMgb246CgokIGdpdCBiaXNlY3QgZ29vZAo3OWJmN2M3MzJiNWZm NzViOTYwMjJlZDlkMjkxODFhZmQzZDI1MDljIGlzIHRoZSBmaXJzdCBiYWQgY29tbWl0CmNvbW1p dCA3OWJmN2M3MzJiNWZmNzViOTYwMjJlZDlkMjkxODFhZmQzZDI1MDljCkF1dGhvcjogU2FnZSBX ZWlsIDxzYWdlQG5ld2RyZWFtLm5ldD4KRGF0ZTogICBUdWUgTWF5IDI0IDEzOjA2OjA2IDIwMTEg LTA3MDAKCiAgICB2ZnM6IHB1c2ggZGVudHJ5X3VuaGFzaCBvbiBybWRpciBpbnRvIGZpbGUgc3lz dGVtcwoKICAgIE9ubHkgYSBmZXcgZmlsZSBzeXN0ZW1zIG5lZWQgdGhpcy4gIFN0YXJ0IGJ5IHB1 c2hpbmcgaXQgZG93biBpbnRvIGVhY2gKICAgIGZzIHJtZGlyIG1ldGhvZCAoZXhjZXB0IGdmczIg YW5kIHhmcykgc28gaXQgY2FuIGJlIGRlYWx0IHdpdGggb24gYSBwZXItZnMKICAgIGJhc2lzLgoK ICAgIFRoaXMgZG9lcyBub3QgY2hhbmdlIGJlaGF2aW9yIGZvciBhbnkgaW4tdHJlZSBmaWxlIHN5 c3RlbXMuCgogICAgQWNrZWQtYnk6IENocmlzdG9waCBIZWxsd2lnIDxoY2hAbHN0LmRlPgogICAg U2lnbmVkLW9mZi1ieTogU2FnZSBXZWlsIDxzYWdlQG5ld2RyZWFtLm5ldD4KICAgIFNpZ25lZC1v ZmYtYnk6IEFsIFZpcm8gPHZpcm9AemVuaXYubGludXgub3JnLnVrPgoKOjA0MDAwMCAwNDAwMDAg YzQ1ZDU4NzE4ZDMzZjdjYTFkYTg3Zjk5ZmE1MzhmNjVlYWEzZmUyYyBlYzcxY2JlY2M1OWU4YjE0 MmE3YmZjYWJkNDY5ZmE2NzQ4NmJlZjMwIE0gICAgICAgIGZzCgpPaywgc28gdGhlIHF1ZXN0aW9u IGhhcyB0byBiZSBhc2tlZCAtIHdoeSB3YXNuJ3QgZGVudHJ5X3VuaGFzaCgpCnB1c2hlZCBkb3du IGludG8gWEZTPwoKRnVydGhlciwgbm93IHRoYXQgZGVudHJ5X3VuaGFzaCgpIGhhcyBiZWVuIHJl bW92ZWQgZnJvbSBtb3N0CmZpbGVzeXN0ZW1zLCB3aGF0IGlzIHJlcGxhY2luZyB0aGUgc2hyaW5r X2RjYWNoZV9wYXJlbnQoKSBjYWxsIHRoYXQKd2FzIGNsZWFuaW5nIHVwIHRoZSAid2UgY2FuIG5l dmVyIHJlZmVyZW5jZSBhZ2FpbiIgY2hpbGQgZGVudHJpZXMgb2YKdGhlIHVubGlua2VkIGRpcmVj dG9yaWVzPyBJdCBhcHBlYXJzIHRoYXQgdGhleSBhcmUgbm93IGJlaW5nIGxlZnQgaW4KbWVtb3J5 IG9uIHRoZSBkZW50cnkgTFJVLiBJdCBhbHNvIGFwcGVhcnMgdGhhdCB0aGV5IGhhdmUKRF9SRUZF UkVOQ0VEIGJpdCBzZXQsIHNvIHRoZXkgZG8gbm90IGdldCBpbW1lZGlhdGVseSByZWNsYWltZWQg YnkKdGhlIHNocmlua2VyLgoKSGVuY2UgdGhleSBtdWNoIG1vcmUgZGlmZmljdWx0IHRvIHJlbW92 ZSBmcm9tIG1lbW9yeSB0aGFuIGluIDIuNi4zOSwKYW5kIHdpdGggdGhlIHJhdGUgYXQgd2hpY2gg dGhleSBhcmUgYmVpbmcgY3JlYXRlZCB0aGUgc2hyaW5rZXIgaXMKc2ltcGx5IG5vdCBhZ2dyZXNz aXZlIGVub3VnaCB0byBmcmVlIHRoZW0gYXQgdGhlIHNhbWUgcmF0ZSBhcyBpbgoyLjYuMzkgYW5k IGhlbmNlIHRoZSBtZW1vcnkgYmFsYW5jZSBvZiB0aGUgY2FjaGVzIGlzIHNpZ25pZmljYW50bHkK Y2hhbmdlZC4KCkl0IHdvdWxkIHNlZW0gdG8gbWUgdGhhdCB3ZSBzdGlsbCBuZWVkIHRoZSBjYWxs IHRvCnNocmlua19kY2FjaGVfcGFyZW50KCkgZm9yIHVubGlua2VkIGRpcmVjdG9yaWVzIC0gdGhh dCBwYXJ0IG9mIHRoZQpkZW50cnlfdW5oYXNoKCkgc3RpbGwgbmVlZHMgdG8gYmUgcnVuIHRvIGVu c3VyZSB0aGF0IHdlIGRvbid0CnBvbGx1dGUgbWVtb3J5IHdpdGggc3RhbGUgZGVudHJpZXMuIFRo ZSBvcmlnaW5hbCBwYXRjaCBzZXJpZXMKc3VnZ2VzdHMgdGhhdCB0aGlzIGlzIGEgcGVyLWZpbGVz eXN0ZW0gZGVjaXNpb247IEkgdGhpbmsgdGhpcwpwcm9ibGVtIHNob3dzIHRoYXQgaXQgaXMgcmVh bGx5IG5lY2Vzc2FyeSBmb3IgbW9zdCBmaWxlc3lzdGVtcy4KU28sIGRvIGkganVzdCBmaXggdGhp cyBpbiBYRlMsIG9yIHNob3VsZCBJIHJlLWFkZCBjYWxscyB0bwpzaHJpbmtfZGNhY2hlX3BhcmVu dCgpIGluIHRoZSBWRlMgZm9yIHJtZGlyIGFuZCByZW5hbWU/Cgo+IG9mIGFib3V0IDIwcywgd2hl cmUgdGhlIHBlYWsgaXMgYWJvdXQgODBrIHVubGlua3MvcywgYW5kIHRoZSB0cm91Z2gKPiBpcyBh cm91bmQgMjBrIHVubGlua3Mvcy4gVGhlIHJ1bnRpbWUgb2YgdGhlIDUwbSBpbm9kZSBkZWxldGUg aGFzCj4gZ29uZSBmcm9tIGFyb3VuZCAxMG0gb24gMi42LjM5LCB0bzoKPiAKPiAxMS43MXVzZXIg NDcwLjA4c3lzdGVtIDE1OjA3LjkxZWxhcHNlZCA1MyVDUFUgKDBhdmd0ZXh0KzBhdmdkYXRhIDEz MzE4NG1heHJlc2lkZW50KWsKPiAwaW5wdXRzKzBvdXRwdXRzICgzMG1ham9yKzQ5NzIyOG1pbm9y KXBhZ2VmYXVsdHMgMHN3YXBzCj4gMTEuNTB1c2VyIDQ2OC4zMHN5c3RlbSAxNToxNC4zNWVsYXBz ZWQgNTIlQ1BVICgwYXZndGV4dCswYXZnZGF0YSAxMzMxNjhtYXhyZXNpZGVudClrCj4gMGlucHV0 cyswb3V0cHV0cyAoNDJtYWpvcis0OTcyNjhtaW5vcilwYWdlZmF1bHRzIDBzd2Fwcwo+IDExLjM0 dXNlciA0NjYuNjZzeXN0ZW0gMTU6MjYuMDRlbGFwc2VkIDUxJUNQVSAoMGF2Z3RleHQrMGF2Z2Rh dGEgMTMzMjE2bWF4cmVzaWRlbnQpawo+IDBpbnB1dHMrMG91dHB1dHMgKDE4bWFqb3IrNDk3MTIx bWlub3IpcGFnZWZhdWx0cyAwc3dhcHMKPiAxMi4xNHVzZXIgNDcwLjQ2c3lzdGVtIDE1OjI2LjYw ZWxhcHNlZCA1MiVDUFUgKDBhdmd0ZXh0KzBhdmdkYXRhIDEzMzIxNm1heHJlc2lkZW50KWsKPiAw aW5wdXRzKzBvdXRwdXRzICg0NG1ham9yKzQ5NzMwOW1pbm9yKXBhZ2VmYXVsdHMgMHN3YXBzCj4g MTIuMDZ1c2VyIDQ2My43NHN5c3RlbSAxNToyOC44NGVsYXBzZWQgNTElQ1BVICgwYXZndGV4dCsw YXZnZGF0YSAxMzMyMzJtYXhyZXNpZGVudClrCj4gMGlucHV0cyswb3V0cHV0cyAoMjVtYWpvcis0 OTcwNDZtaW5vcilwYWdlZmF1bHRzIDBzd2Fwcwo+IDExLjM3dXNlciA0NjguMThzeXN0ZW0gMTU6 MjkuMDdlbGFwc2VkIDUxJUNQVSAoMGF2Z3RleHQrMGF2Z2RhdGEgMTMzMTg0bWF4cmVzaWRlbnQp awo+IDBpbnB1dHMrMG91dHB1dHMgKDU1bWFqb3IrNDk3MDU2bWlub3IpcGFnZWZhdWx0cyAwc3dh cHMKPiAxMS42OXVzZXIgNDc0LjQ2c3lzdGVtIDE1OjQ3LjQ1ZWxhcHNlZCA1MSVDUFUgKDBhdmd0 ZXh0KzBhdmdkYXRhIDEzMzIzMm1heHJlc2lkZW50KWsKPiAwaW5wdXRzKzBvdXRwdXRzICg2MW1h am9yKzQ5NzI4NG1pbm9yKXBhZ2VmYXVsdHMgMHN3YXBzCj4gMTEuMzJ1c2VyIDQ3Ni45M3N5c3Rl bSAxNjowNS4xNGVsYXBzZWQgNTAlQ1BVICgwYXZndGV4dCswYXZnZGF0YSAxMzMxODRtYXhyZXNp ZGVudClrCj4gMGlucHV0cyswb3V0cHV0cyAoMzBtYWpvcis0OTcyMjVtaW5vcilwYWdlZmF1bHRz IDBzd2Fwcwo+IAo+IEFib3V0IDE2IG1pbnV0ZXMuIEknbSBub3Qgc3VyZSB5ZXQgd2hldGhlciB0 aGlzIGNoYW5nZSBvZiBjYWNoZQo+IGJlaGF2aW91ciBpcyB0aGUgY2F1c2Ugb2YgdGhlIGVudGly ZSBwZXJmb3JtYW5jZSByZWdyZXNzaW9uLCBidXQKPiBpdCdzIGEgZ29vZCBjaGFuY2UgdGhhdCBp dCBpcyBhIGNvbnRyaWJ1dGluZyBmYWN0b3IuCgpUaGUgY2FjaGUgc2l6ZSBncm93dGggYnVnIGRv ZXMgbm90IGFwcGVhciB0byBiZSByZXNwb25zaWJsZSBmb3IgYW55Cm9mIHRoZSBwZXJmb3JtYW5j ZSByZWdyZXNzaW9uLgoKQ2hlZXJzLAoKRGF2ZS4KLS0gCkRhdmUgQ2hpbm5lcgpkYXZpZEBmcm9t b3JiaXQuY29tCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f Xwp4ZnMgbWFpbGluZyBsaXN0Cnhmc0Bvc3Muc2dpLmNvbQpodHRwOi8vb3NzLnNnaS5jb20vbWFp bG1hbi9saXN0aW5mby94ZnMK