From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id o4JMZAa7159583 for ; Wed, 19 May 2010 17:35:11 -0500 Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 5AB20109AA5B for ; Wed, 19 May 2010 15:38:38 -0700 (PDT) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id IWaqvH5XAjkUy197 for ; Wed, 19 May 2010 15:38:38 -0700 (PDT) Date: Thu, 20 May 2010 08:37:25 +1000 From: Dave Chinner Subject: Re: [PATCH 03/12] xfs: modify buffer item reference counting Message-ID: <20100519223725.GO8120@dastard> References: <1274138668-1662-1-git-send-email-david@fromorbit.com> <1274138668-1662-4-git-send-email-david@fromorbit.com> <1274294158.2140.35.camel@doink> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1274294158.2140.35.camel@doink> 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: Alex Elder Cc: xfs@oss.sgi.com T24gV2VkLCBNYXkgMTksIDIwMTAgYXQgMDE6MzU6NThQTSAtMDUwMCwgQWxleCBFbGRlciB3cm90 ZToKPiBPbiBUdWUsIDIwMTAtMDUtMTggYXQgMDk6MjQgKzEwMDAsIERhdmUgQ2hpbm5lciB3cm90 ZToKPiA+IEZyb206IERhdmUgQ2hpbm5lciA8ZGNoaW5uZXJAcmVkaGF0LmNvbT4KPiA+IAo+ID4g VGhlIGJ1ZmZlciBsb2cgaXRlbSByZWZlcmVuY2UgY291bnRzIHVzZWQgdG8gdGFrZSByZWZlcmVu Y2XRlSBmb3IgZXZlcnkKPiA+IHRyYW5zYWN0aW9uLCBzaW1pbGFyIHRvIHRoZSBwaW4gY291bnRp bmcuIFRoaXMgaXMgc3ltbWV0cmljIChsaWtlIHRoZQo+ID4gcGluL3VucGluKSB3aXRoIHJlc3Bl Y3QgdG8gdHJhbnNhY3Rpb24gY29tcGxldGlvbiwgYnV0IHdpdGggZGxlYXllZCBsb2dnaW5nCj4g PiBiZWNvbWVzIGFzc3ltZXRyaWMgYXMgdGhlIHBpbm5pbmcgYmVjb21lcyBhc3N5bWV0cmljIHcu ci50LiB0cmFuc2FjdGlvbgo+ID4gY29tcGxldGlvbi4KPiAKPiBEb2luZyB0aGUgcmVmZXJlbmNl IGNvdW50cyB0aGlzIHdheSBpcyBhbiBpbXByb3ZlbWVudC4KPiAKPiBJIGhhdmUgYSBxdWVzdGlv biBiZWxvdy4KPiAKPiAuIC4gLgo+ID4gLS0tIGEvZnMveGZzL3hmc19idWZfaXRlbS5jCj4gPiAr KysgYi9mcy94ZnMveGZzX2J1Zl9pdGVtLmMKPiAuIC4gLgo+ID4gIFNUQVRJQyB2b2lkCj4gPiAg eGZzX2J1Zl9pdGVtX3VubG9jaygKPiA+IEBAIC01MTQsNzMgKzUyMyw1NCBAQCB4ZnNfYnVmX2l0 ZW1fdW5sb2NrKAo+ID4gIAo+ID4gIAlicCA9IGJpcC0+YmxpX2J1ZjsKPiA+ICAKPiA+IC0JLyoK PiA+IC0JICogQ2xlYXIgdGhlIGJ1ZmZlcidzIGFzc29jaWF0aW9uIHdpdGggdGhpcyB0cmFuc2Fj dGlvbi4KPiA+IC0JICovCj4gPiArCS8qIENsZWFyIHRoZSBidWZmZXIncyBhc3NvY2lhdGlvbiB3 aXRoIHRoaXMgdHJhbnNhY3Rpb24uICovCj4gPiAgCVhGU19CVUZfU0VUX0ZTUFJJVkFURTIoYnAs IE5VTEwpOwo+ID4gIAo+ID4gIAkvKgo+ID4gLQkgKiBJZiB0aGlzIGlzIGEgdHJhbnNhY3Rpb24g YWJvcnQsIGRvbid0IHJldHVybiBlYXJseS4KPiA+IC0JICogSW5zdGVhZCwgYWxsb3cgdGhlIGJy ZWxzZSB0byBoYXBwZW4uCj4gPiAtCSAqIE5vcm1hbGx5IGl0IHdvdWxkIGJlIGRvbmUgZm9yIHN0 YWxlIChjYW5jZWxsZWQpIGJ1ZmZlcnMKPiA+IC0JICogYXQgdW5waW4gdGltZSwgYnV0IHdlJ2xs IG5ldmVyIGdvIHRocm91Z2ggdGhlIHBpbi91bnBpbgo+ID4gLQkgKiBjeWNsZSBpZiB3ZSBhYm9y dCBpbnNpZGUgY29tbWl0Lgo+ID4gKwkgKiBJZiB0aGlzIGlzIGEgdHJhbnNhY3Rpb24gYWJvcnQs IGRvbid0IHJldHVybiBlYXJseS4gIEluc3RlYWQsIGFsbG93Cj4gPiArCSAqIHRoZSBicmVsc2Ug dG8gaGFwcGVuLiAgTm9ybWFsbHkgaXQgd291bGQgYmUgZG9uZSBmb3Igc3RhbGUKPiA+ICsJICog KGNhbmNlbGxlZCkgYnVmZmVycyBhdCB1bnBpbiB0aW1lLCBidXQgd2UnbGwgbmV2ZXIgZ28gdGhy b3VnaCB0aGUKPiA+ICsJICogcGluL3VucGluIGN5Y2xlIGlmIHdlIGFib3J0IGluc2lkZSBjb21t aXQuCj4gPiAgCSAqLwo+ID4gIAlhYm9ydGVkID0gKGJpcC0+YmxpX2l0ZW0ubGlfZmxhZ3MgJiBY RlNfTElfQUJPUlRFRCkgIT0gMDsKPiA+ICAKPiA+ICAJLyoKPiA+IC0JICogSWYgdGhlIGJ1ZiBp dGVtIGlzIG1hcmtlZCBzdGFsZSwgdGhlbiBkb24ndCBkbyBhbnl0aGluZy4KPiA+IC0JICogV2Un bGwgdW5sb2NrIHRoZSBidWZmZXIgYW5kIGZyZWUgdGhlIGJ1ZiBpdGVtIHdoZW4gdGhlCj4gPiAt CSAqIGJ1ZmZlciBpcyB1bnBpbm5lZCBmb3IgdGhlIGxhc3QgdGltZS4KPiA+ICsJICogQmVmb3Jl IHBvc3NpYmx5IGZyZWVpbmcgdGhlIGJ1ZiBpdGVtLCBkZXRlcm1pbmUgaWYgd2Ugc2hvdWxkCj4g PiArCSAqIHJlbGVhc2UgdGhlIGJ1ZmZlciBhdCB0aGUgZW5kIG9mIHRoaXMgcm91dGluZS4KPiA+ ICsJICovCj4gPiArCWhvbGQgPSBiaXAtPmJsaV9mbGFncyAmIFhGU19CTElfSE9MRDsKPiA+ICsK PiA+ICsJLyogQ2xlYXIgdGhlIHBlciB0cmFuc2FjdGlvbiBzdGF0ZS4gKi8KPiA+ICsJYmlwLT5i bGlfZmxhZ3MgJj0gfihYRlNfQkxJX0xPR0dFRCB8IFhGU19CTElfSE9MRCk7Cj4gPiArCj4gPiAr CS8qCj4gPiArCSAqIElmIHRoZSBidWYgaXRlbSBpcyBtYXJrZWQgc3RhbGUsIHRoZW4gZG9uJ3Qg ZG8gYW55dGhpbmcuICBXZSdsbAo+ID4gKwkgKiB1bmxvY2sgdGhlIGJ1ZmZlciBhbmQgZnJlZSB0 aGUgYnVmIGl0ZW0gd2hlbiB0aGUgYnVmZmVyIGlzIHVucGlubmVkCj4gPiArCSAqIGZvciB0aGUg bGFzdCB0aW1lLgo+ID4gIAkgKi8KPiA+ICAJaWYgKGJpcC0+YmxpX2ZsYWdzICYgWEZTX0JMSV9T VEFMRSkgewo+ID4gLQkJYmlwLT5ibGlfZmxhZ3MgJj0gflhGU19CTElfTE9HR0VEOwo+ID4gIAkJ dHJhY2VfeGZzX2J1Zl9pdGVtX3VubG9ja19zdGFsZShiaXApOwo+ID4gIAkJQVNTRVJUKGJpcC0+ YmxpX2Zvcm1hdC5ibGZfZmxhZ3MgJiBYRlNfQkxJX0NBTkNFTCk7Cj4gPiAtCQlpZiAoIWFib3J0 ZWQpCj4gPiArCQlpZiAoIWFib3J0ZWQpIHsKPiA+ICsJCQlhdG9taWNfZGVjKCZiaXAtPmJsaV9y ZWZjb3VudCk7Cj4gCj4gSSBub3RpY2UgdGhhdCwgdW5saWtlIGJlZm9yZSwgaWYgeW91IHJldHVy biB2aWEgdGhpcyBwYXRoCj4gdGhlIFhGU19CTElfSE9MRCBmbGFnIHdpbGwgaGF2ZSBiZWVuIHR1 cm5lZCBvZmYuICBJIGd1ZXNzCj4gSSBkb24ndCBrbm93IG9mZiBoYW5kIHdoZXRoZXIgdGhpcyBp cyBhbiBpc3N1ZS4gIENhbiB5b3UKPiBleHBsYWluIHdoeSBpdCBpcyBub3Q/CgpBIGJ1ZmZlciB0 aGF0IGhhcyBiZWVuIG1hcmtlZCBzdGFsZSBpcyBvbiB0aGF0IGhhcyBiZWVuIGludmFsaWRhdGVk Owp0aGV5IHNob3VsZG4ndCBnZXQgaGVsZCBhY3Jvc3Mgcm9sbGluZyB0cmFuc2FjdGlvbnMgYmVj YXVzZSB0aGV5CnJlZmVyZW5jZSBmcmVlIHNwYWNlIGFuZCBjYW5ub3QgYmUgcmV1c2VkIHdpdGhv dXQgYmVpbmcgcmVhbGxvY2F0ZWQuCgpDaGVlcnMsCgpEYXZlLgotLSAKRGF2ZSBDaGlubmVyCmRh dmlkQGZyb21vcmJpdC5jb20KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fCnhmcyBtYWlsaW5nIGxpc3QKeGZzQG9zcy5zZ2kuY29tCmh0dHA6Ly9vc3Muc2dp LmNvbS9tYWlsbWFuL2xpc3RpbmZvL3hmcwo=