From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from esa2.hgst.iphmx.com ([68.232.143.124]:8900 "EHLO esa2.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751909AbdIVPGU (ORCPT ); Fri, 22 Sep 2017 11:06:20 -0400 From: Bart Van Assche To: "dm-devel@redhat.com" , "axboe@fb.com" , "ming.lei@redhat.com" , "snitzer@redhat.com" CC: Bart Van Assche , "hch@infradead.org" , "linux-block@vger.kernel.org" , "loberman@redhat.com" Subject: Re: [PATCH] dm-mpath: return DM_MAPIO_REQUEUE in case of rq allocation failure Date: Fri, 22 Sep 2017 15:06:16 +0000 Message-ID: <1506092775.2512.5.camel@wdc.com> References: <20170922013506.22510-1-ming.lei@redhat.com> In-Reply-To: <20170922013506.22510-1-ming.lei@redhat.com> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org T24gRnJpLCAyMDE3LTA5LTIyIGF0IDA5OjM1ICswODAwLCBNaW5nIExlaSB3cm90ZToNCj4gKwkJ LyoNCj4gKwkJICogYmxrLW1xJ3MgU0NIRURfUkVTVEFSVCBjYW4gY292ZXIgdGhpcyByZXF1ZXVl LCBzbw0KPiArCQkgKiB3ZSBuZWVkbid0IHRvIGRlYWwgd2l0aCBpdCBieSBERUxBWV9SRVFVRVVF LiBNb3JlDQo+ICsJCSAqIGltcG9ydGFudGx5LCB3ZSBoYXZlIHRvIHJldHVybiBETV9NQVBJT19S RVFVRVVFDQo+ICsJCSAqIHNvIHRoYXQgYmxrLW1xIGNhbiBnZXQgdGhlIHF1ZXVlIGJ1c3kgZmVl ZGJhY2ssDQo+ICsJCSAqIG90aGVyd2lzZSBJL08gbWVyZ2UgY2FuIGJlIGh1cnQuDQo+ICsJCSAq Lw0KPiArCQlpZiAocS0+bXFfb3BzKQ0KPiArCQkJcmV0dXJuIERNX01BUElPX1JFUVVFVUU7DQo+ ICsJCWVsc2UNCj4gKwkJCXJldHVybiBETV9NQVBJT19ERUxBWV9SRVFVRVVFOw0KPiAgCX0NCg0K VGhpcyBwYXRjaCBpcyBpbmZlcmlvciB0byB3aGF0IEkgcG9zdGVkIGJlY2F1c2UgdGhpcyBwYXRj aCBkb2VzIG5vdCBhdm9pZA0KdGhlIGRlbGF5IGlmIG11bHRpcGxlIExVTnMgYXJlIGFzc29jaWF0 ZWQgd2l0aCB0aGUgc2FtZSBTQ1NJIGhvc3QuIENvbnNpZGVyDQplLmcuIHRoZSBmb2xsb3dpbmcg Y29uZmlndXJhdGlvbjoNCiogQSBzaW5nbGUgU0NTSSBob3N0IHdpdGggdHdvIFNDU0kgTFVOcyBh c3NvY2lhdGVkIHRvIHRoYXQgaG9zdCwgZS5nLiAvZGV2L3NkYQ0KICBhbmQgL2Rldi9zZGIuDQoq IEEgZG0tbXBhdGggaW5zdGFuY2UgaGFzIGJlZW4gY3JlYXRlZCBvbiB0b3Agb2YgL2Rldi9zZGEu DQpJZiBhbGwgdGFncyBhcmUgaW4gdXNlIGJ5IHJlcXVlc3RzIHF1ZXVlZCB0byAvZGV2L3NkYiwg bm8gZG0gcmVxdWVzdHMgYXJlIGluDQpwcm9ncmVzcyBhbmQgYSByZXF1ZXN0IGlzIHN1Ym1pdHRl ZCBhZ2FpbnN0IHRoZSBkbS1tcGF0aCBkZXZpY2UgdGhlbiB0aGUNCmJsa19nZXRfcmVxdWVzdChx LCBHRlBfQVRPTUlDKSBjYWxsIHdpbGwgZmFpbC4gVGhlIHJlcXVlc3Qgd2lsbCBiZSByZXF1ZXVl ZA0KYW5kIHRoZSBxdWV1ZSB3aWxsIGJlIHJlcnVuIGFmdGVyIGEgZGVsYXkuDQoNCk15IHBhdGNo IGRvZXMgbm90IGludHJvZHVjZSBhIGRlbGF5IGluIHRoaXMgY2FzZS4NCg0KQmFydC4=