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 o4JIXhFu147090 for ; Wed, 19 May 2010 13:33:43 -0500 Subject: Re: [PATCH 03/12] xfs: modify buffer item reference counting From: Alex Elder In-Reply-To: <1274138668-1662-4-git-send-email-david@fromorbit.com> References: <1274138668-1662-1-git-send-email-david@fromorbit.com> <1274138668-1662-4-git-send-email-david@fromorbit.com> Date: Wed, 19 May 2010 13:35:58 -0500 Message-ID: <1274294158.2140.35.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 T24gVHVlLCAyMDEwLTA1LTE4IGF0IDA5OjI0ICsxMDAwLCBEYXZlIENoaW5uZXIgd3JvdGU6Cj4g RnJvbTogRGF2ZSBDaGlubmVyIDxkY2hpbm5lckByZWRoYXQuY29tPgo+IAo+IFRoZSBidWZmZXIg bG9nIGl0ZW0gcmVmZXJlbmNlIGNvdW50cyB1c2VkIHRvIHRha2UgcmVmZXJlbmNl0ZUgZm9yIGV2 ZXJ5Cj4gdHJhbnNhY3Rpb24sIHNpbWlsYXIgdG8gdGhlIHBpbiBjb3VudGluZy4gVGhpcyBpcyBz eW1tZXRyaWMgKGxpa2UgdGhlCj4gcGluL3VucGluKSB3aXRoIHJlc3BlY3QgdG8gdHJhbnNhY3Rp b24gY29tcGxldGlvbiwgYnV0IHdpdGggZGxlYXllZCBsb2dnaW5nCj4gYmVjb21lcyBhc3N5bWV0 cmljIGFzIHRoZSBwaW5uaW5nIGJlY29tZXMgYXNzeW1ldHJpYyB3LnIudC4gdHJhbnNhY3Rpb24K PiBjb21wbGV0aW9uLgoKRG9pbmcgdGhlIHJlZmVyZW5jZSBjb3VudHMgdGhpcyB3YXkgaXMgYW4g aW1wcm92ZW1lbnQuCgpJIGhhdmUgYSBxdWVzdGlvbiBiZWxvdy4KCi4gLiAuCj4gLS0tIGEvZnMv eGZzL3hmc19idWZfaXRlbS5jCj4gKysrIGIvZnMveGZzL3hmc19idWZfaXRlbS5jCi4gLiAuCj4g IFNUQVRJQyB2b2lkCj4gIHhmc19idWZfaXRlbV91bmxvY2soCj4gQEAgLTUxNCw3MyArNTIzLDU0 IEBAIHhmc19idWZfaXRlbV91bmxvY2soCj4gIAo+ICAJYnAgPSBiaXAtPmJsaV9idWY7Cj4gIAo+ IC0JLyoKPiAtCSAqIENsZWFyIHRoZSBidWZmZXIncyBhc3NvY2lhdGlvbiB3aXRoIHRoaXMgdHJh bnNhY3Rpb24uCj4gLQkgKi8KPiArCS8qIENsZWFyIHRoZSBidWZmZXIncyBhc3NvY2lhdGlvbiB3 aXRoIHRoaXMgdHJhbnNhY3Rpb24uICovCj4gIAlYRlNfQlVGX1NFVF9GU1BSSVZBVEUyKGJwLCBO VUxMKTsKPiAgCj4gIAkvKgo+IC0JICogSWYgdGhpcyBpcyBhIHRyYW5zYWN0aW9uIGFib3J0LCBk b24ndCByZXR1cm4gZWFybHkuCj4gLQkgKiBJbnN0ZWFkLCBhbGxvdyB0aGUgYnJlbHNlIHRvIGhh cHBlbi4KPiAtCSAqIE5vcm1hbGx5IGl0IHdvdWxkIGJlIGRvbmUgZm9yIHN0YWxlIChjYW5jZWxs ZWQpIGJ1ZmZlcnMKPiAtCSAqIGF0IHVucGluIHRpbWUsIGJ1dCB3ZSdsbCBuZXZlciBnbyB0aHJv dWdoIHRoZSBwaW4vdW5waW4KPiAtCSAqIGN5Y2xlIGlmIHdlIGFib3J0IGluc2lkZSBjb21taXQu Cj4gKwkgKiBJZiB0aGlzIGlzIGEgdHJhbnNhY3Rpb24gYWJvcnQsIGRvbid0IHJldHVybiBlYXJs eS4gIEluc3RlYWQsIGFsbG93Cj4gKwkgKiB0aGUgYnJlbHNlIHRvIGhhcHBlbi4gIE5vcm1hbGx5 IGl0IHdvdWxkIGJlIGRvbmUgZm9yIHN0YWxlCj4gKwkgKiAoY2FuY2VsbGVkKSBidWZmZXJzIGF0 IHVucGluIHRpbWUsIGJ1dCB3ZSdsbCBuZXZlciBnbyB0aHJvdWdoIHRoZQo+ICsJICogcGluL3Vu cGluIGN5Y2xlIGlmIHdlIGFib3J0IGluc2lkZSBjb21taXQuCj4gIAkgKi8KPiAgCWFib3J0ZWQg PSAoYmlwLT5ibGlfaXRlbS5saV9mbGFncyAmIFhGU19MSV9BQk9SVEVEKSAhPSAwOwo+ICAKPiAg CS8qCj4gLQkgKiBJZiB0aGUgYnVmIGl0ZW0gaXMgbWFya2VkIHN0YWxlLCB0aGVuIGRvbid0IGRv IGFueXRoaW5nLgo+IC0JICogV2UnbGwgdW5sb2NrIHRoZSBidWZmZXIgYW5kIGZyZWUgdGhlIGJ1 ZiBpdGVtIHdoZW4gdGhlCj4gLQkgKiBidWZmZXIgaXMgdW5waW5uZWQgZm9yIHRoZSBsYXN0IHRp bWUuCj4gKwkgKiBCZWZvcmUgcG9zc2libHkgZnJlZWluZyB0aGUgYnVmIGl0ZW0sIGRldGVybWlu ZSBpZiB3ZSBzaG91bGQKPiArCSAqIHJlbGVhc2UgdGhlIGJ1ZmZlciBhdCB0aGUgZW5kIG9mIHRo aXMgcm91dGluZS4KPiArCSAqLwo+ICsJaG9sZCA9IGJpcC0+YmxpX2ZsYWdzICYgWEZTX0JMSV9I T0xEOwo+ICsKPiArCS8qIENsZWFyIHRoZSBwZXIgdHJhbnNhY3Rpb24gc3RhdGUuICovCj4gKwli aXAtPmJsaV9mbGFncyAmPSB+KFhGU19CTElfTE9HR0VEIHwgWEZTX0JMSV9IT0xEKTsKPiArCj4g KwkvKgo+ICsJICogSWYgdGhlIGJ1ZiBpdGVtIGlzIG1hcmtlZCBzdGFsZSwgdGhlbiBkb24ndCBk byBhbnl0aGluZy4gIFdlJ2xsCj4gKwkgKiB1bmxvY2sgdGhlIGJ1ZmZlciBhbmQgZnJlZSB0aGUg YnVmIGl0ZW0gd2hlbiB0aGUgYnVmZmVyIGlzIHVucGlubmVkCj4gKwkgKiBmb3IgdGhlIGxhc3Qg dGltZS4KPiAgCSAqLwo+ICAJaWYgKGJpcC0+YmxpX2ZsYWdzICYgWEZTX0JMSV9TVEFMRSkgewo+ IC0JCWJpcC0+YmxpX2ZsYWdzICY9IH5YRlNfQkxJX0xPR0dFRDsKPiAgCQl0cmFjZV94ZnNfYnVm X2l0ZW1fdW5sb2NrX3N0YWxlKGJpcCk7Cj4gIAkJQVNTRVJUKGJpcC0+YmxpX2Zvcm1hdC5ibGZf ZmxhZ3MgJiBYRlNfQkxJX0NBTkNFTCk7Cj4gLQkJaWYgKCFhYm9ydGVkKQo+ICsJCWlmICghYWJv cnRlZCkgewo+ICsJCQlhdG9taWNfZGVjKCZiaXAtPmJsaV9yZWZjb3VudCk7CgpJIG5vdGljZSB0 aGF0LCB1bmxpa2UgYmVmb3JlLCBpZiB5b3UgcmV0dXJuIHZpYSB0aGlzIHBhdGgKdGhlIFhGU19C TElfSE9MRCBmbGFnIHdpbGwgaGF2ZSBiZWVuIHR1cm5lZCBvZmYuICBJIGd1ZXNzCkkgZG9uJ3Qg a25vdyBvZmYgaGFuZCB3aGV0aGVyIHRoaXMgaXMgYW4gaXNzdWUuICBDYW4geW91CmV4cGxhaW4g d2h5IGl0IGlzIG5vdD8KCj4gIAkJCXJldHVybjsKPiArCQl9Cj4gIAl9Cj4gIAouIC4gLgoKX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KeGZzIG1haWxpbmcg bGlzdAp4ZnNAb3NzLnNnaS5jb20KaHR0cDovL29zcy5zZ2kuY29tL21haWxtYW4vbGlzdGluZm8v eGZzCg==