From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: linux-nfs-owner@vger.kernel.org Received: from dgate20.ts.fujitsu.com ([80.70.172.51]:39984 "EHLO dgate20.ts.fujitsu.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751054Ab3DSQzy (ORCPT ); Fri, 19 Apr 2013 12:55:54 -0400 Message-Id: <61eb00$3kapi3@dgate20u.abg.fsc.net> Date: 19 Apr 2013 18:55:53 +0200 From: Bodo Stroesser To: bfields@fieldses.org Cc: neilb@suse.de, linux-nfs@vger.kernel.org, bstroesser@ts.fujitsu.com Subject: Re: sunrpc/cache.c: races while updating cache entries Content-Type: text/plain; charset=us-ascii Sender: linux-nfs-owner@vger.kernel.org List-ID: T24gMDUgQXByIDIwMTMgMjM6MDk6MDAgKzAxMDAgSi4gQnJ1Y2UgRmllbGRzIDxiZmllbGRz QGZpZWxkc2VzLm9yZz4gd3JvdGU6Cj4gT24gRnJpLCBBcHIgMDUsIDIwMTMgYXQgMDU6MzM6 NDlQTSArMDIwMCwgQm9kbyBTdHJvZXNzZXIgd3JvdGU6Cj4gPiBPbiAwNSBBcHIgMjAxMyAx NDo0MDowMCArMDEwMCBKLiBCcnVjZSBGaWVsZHMgPGJmaWVsZHNAZmllbGRzZXMub3JnPiB3 cm90ZToKPiA+ID4gT24gVGh1LCBBcHIgMDQsIDIwMTMgYXQgMDc6NTk6MzVQTSArMDIwMCwg Qm9kbyBTdHJvZXNzZXIgd3JvdGU6Cj4gPiA+ID4gVGhlcmUgaXMgbm8gcmVhc29uIGZvciBh cG9sb2dpZXMuIFRoZSB0aHJlYWQgbWVhbndoaWxlIHNlZW1zIHRvIGJlIGEgYml0Cj4gPiA+ ID4gY29uZnVzaW5nIDotKQo+ID4gPiA+IAo+ID4gPiA+IEN1cnJlbnQgc3RhdGUgaXM6Cj4g PiA+ID4gCj4gPiA+ID4gLSBOZWlsIEJyb3duIGhhcyBjcmVhdGVkIHR3byBzZXJpZXMgb2Yg cGF0Y2hlcy4gT25lIGZvciBTTEVTMTEtU1AxIGFuZCBhCj4gPiA+ID4gICBzZWNvbmQgb25l IGZvciAtU1AyCj4gPiA+ID4gCj4gPiA+ID4gLSBBRkFJQ1MsIHRoZSBzZXJpZXMgZm9yIC1T UDIgd2lsbCBtYXRjaCB3aXRoIG1haW5saW5lIGFsc28uCj4gPiA+ID4gCj4gPiA+ID4gLSBU b2RheSBJIGZvdW5kIGFuZCBmaXhlZCB0aGUgKGhvcGVmdWxseSkgbGFzdCBwcm9ibGVtIGlu IHRoZSAtU1AxIHNlcmllcy4KPiA+ID4gPiAgIE15IHRlc3QgdXNpbmcgdGhpcyBwYXRjaHNl dCB3aWxsIHJ1biB1bnRpbCBNb25kYXkuCj4gPiA+ID4gCj4gPiA+ID4gLSBQcm92aWRlZCB0 aGUgdGVzdCBvbiBTUDEgc3VjY2VlZHMsIHByb2JhYmx5IG9uIFR1ZXNkYXkgSSdsbCBzdGFy dCB0byB0ZXN0Cj4gPiA+ID4gICB0aGUgcGF0Y2hlcyBmb3IgU1AyIChhbmQgbWFpbmxpbmUp LiBJZiBpdCBydW5zIGZpbmUsIHdlJ2xsIGhhdmUgYSB0ZXN0ZWQKPiA+ID4gPiAgIHBhdGNo c2V0IG5vdCBsYXRlciB0aGFuIE1vbiAxNXRoLgo+ID4gPiAKPiA+ID4gT0ssIGdyZWF0LCBh cyBsb25nIGFzIGl0IGhhc24ndCBqdXN0IGJlZW4gZm9yZ290dGVuIQo+ID4gPiAKPiA+ID4g SSdkIGFsc28gYmUgY3VyaW91cyB0byB1bmRlcnN0YW5kIHdoeSB3ZSBhcmVuJ3QgZ2V0dGlu ZyBhIGxvdCBvZgo+ID4gPiBjb21wbGFpbnRzIGFib3V0IHRoaXMgZnJvbSBlbHNld2hlcmUu Li4uICBJcyB0aGVyZSBzb21ldGhpbmcgdW5pcXVlCj4gPiA+IGFib3V0IHlvdXIgc2V0dXA/ ICBEbyB0aGUgYnVncyB0aGF0IHJlbWFpbiB1cHN0cmVhbSB0YWtlIGEgbG9uZyB0aW1lIHRv Cj4gPiA+IHJlcHJvZHVjZT8KPiA+ID4gCj4gPiA+IC0tYi4KPiA+ID4gCj4gPiAKPiA+IEl0 J3Mgbm8gc2VjcmV0LCB3aGF0IHdlIGFyZSBkb2luZy4gU28gbGV0IG1lIHRyeSB0byBleHBs YWluOgo+IAo+IFRoYW5rcyBmb3IgdGhlIGRldGFpbGVkIGV4cGxhbmF0aW9uISAgSSdsbCBs b29rIGZvcndhcmQgdG8gdGhlIHBhdGNoZXMuCj4gCj4gLS1iLgo+IAoKTGV0IG1lIGdpdmUg YW4gaW50ZXJtZWRpYXRlIHJlc3VsdDoKClRoZSB0ZXN0IG9mIHRoZSAtU1AxIHBhdGNoIHNl cmllcyBzdWNjZWVkZWQuCgpXZSBzdGFydGVkIHRoZSB0ZXN0IG9mIHRoZSAtU1AyIChhbmQg bWFpbmxpbmUpIHNlcmllcyBvbiBUdWUsIDl0aCwgYnV0IGhhZCBubwpzdWNjZXNzLgpXZSBk aWQgX25vdF8gZmluZCBhIHByb2JsZW0gd2l0aCB0aGUgcGF0Y2hlcywgYnV0IHVuZGVyIC1T UDIgb3VyIHRlc3Qgc2NlbmFyaW8KaGFzIGxlc3MgdGhhbiA0MCUgb2YgdGhlIHRocm91Z2hw dXQgd2Ugc2F3IHVuZGVyIC1TUDEuIFdpdGggdGhhdCBsb3cKcGVyZm9ybWFuY2UsIHdlIGhh ZCBhIDQgZGF5IHJ1biB3aXRob3V0IGFueSBkcm9wcGVkIFJQQyByZXF1ZXN0LiBCdXQgd2Ug ZG9uJ3QKa25vdyB0aGUgZXJyb3IgcmF0ZSB3aXRob3V0IHRoZSBwYXRjaGVzIHVuZGVyIHRo ZXNlIGNvbmRpdGlvbnMuIFNvIHdlIGNhbid0CmdpdmUgYW4gby5rLiBmb3IgdGhlIHBhdGNo ZXMgeWV0LgoKQ3VycmVudGx5IHdlIHRyeSB0byBmaW5kIHRoZSByZWFzb24gZm9yIHRoZSBk aWZmZXJlbnQgYmVoYXZpb3Igb2YgU1AxIGFuZCBTUDIKCkJvZG8K