From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Bart Van Assche To: "kent.overstreet@gmail.com" CC: "mingo@kernel.org" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "linux-block@vger.kernel.org" , "axboe@kernel.dk" Subject: Re: [PATCH 00/10] Misc block layer patches for bcachefs Date: Sun, 20 May 2018 23:10:54 +0000 Message-ID: References: <20180509013358.16399-1-kent.overstreet@gmail.com> <20180518090636.GA14738@kmo-pixel> <8f62d8f870c6b66e90d3e7f57acee481acff57f5.camel@wdc.com> <20180520221733.GA11495@kmo-pixel> <20180520223116.GB11495@kmo-pixel> <20180520230055.GD11495@kmo-pixel> In-Reply-To: <20180520230055.GD11495@kmo-pixel> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gU3VuLCAyMDE4LTA1LTIwIGF0IDE5OjAwIC0wNDAwLCBLZW50IE92ZXJzdHJlZXQgd3JvdGU6 DQo+IE9uIFN1biwgTWF5IDIwLCAyMDE4IGF0IDEwOjM1OjI5UE0gKzAwMDAsIEJhcnQgVmFuIEFz c2NoZSB3cm90ZToNCj4gPiBPbiBTdW4sIDIwMTgtMDUtMjAgYXQgMTg6MzEgLTA0MDAsIEtlbnQg T3ZlcnN0cmVldCB3cm90ZToNCj4gPiA+IE9uIFN1biwgTWF5IDIwLCAyMDE4IGF0IDEwOjE5OjEz UE0gKzAwMDAsIEJhcnQgVmFuIEFzc2NoZSB3cm90ZToNCj4gPiA+ID4gT24gU3VuLCAyMDE4LTA1 LTIwIGF0IDE4OjE3IC0wNDAwLCBLZW50IE92ZXJzdHJlZXQgd3JvdGU6DQo+ID4gPiA+ID4gT24g RnJpLCBNYXkgMTgsIDIwMTggYXQgMDM6MTI6MjdQTSArMDAwMCwgQmFydCBWYW4gQXNzY2hlIHdy b3RlOg0KPiA+ID4gPiA+ID4gT24gRnJpLCAyMDE4LTA1LTE4IGF0IDA1OjA2IC0wNDAwLCBLZW50 IE92ZXJzdHJlZXQgd3JvdGU6DQo+ID4gPiA+ID4gPiA+IE9uIFRodSwgTWF5IDE3LCAyMDE4IGF0 IDA4OjU0OjU3UE0gKzAwMDAsIEJhcnQgVmFuIEFzc2NoZSB3cm90ZToNCj4gPiA+ID4gPiA+ID4g PiBXaXRoIEplbnMnIGxhdGVzdCBmb3ItbmV4dCBicmFuY2ggSSBoaXQgdGhlIGtlcm5lbCB3YXJu aW5nIHNob3duIGJlbG93LiBDYW4NCj4gPiA+ID4gPiA+ID4gPiB5b3UgaGF2ZSBhIGxvb2s/DQo+ ID4gPiA+ID4gPiA+IA0KPiA+ID4gPiA+ID4gPiBBbnkgaGludHMgb24gaG93IHRvIHJlcHJvZHVj ZSBpdD8NCj4gPiA+ID4gPiA+IA0KPiA+ID4gPiA+ID4gU3VyZS4gVGhpcyBpcyBob3cgSSB0cmln Z2VyZWQgaXQ6DQo+ID4gPiA+ID4gPiAqIENsb25lIGh0dHBzOi8vZ2l0aHViLmNvbS9idmFuYXNz Y2hlL3NycC10ZXN0Lg0KPiA+ID4gPiA+ID4gKiBGb2xsb3cgdGhlIGluc3RydWN0aW9ucyBpbiBS RUFETUUubWQuDQo+ID4gPiA+ID4gPiAqIFJ1biBzcnAtdGVzdC9ydW5fdGVzdHMgLWMgLXIgMTAN Cj4gPiA+ID4gPiANCj4gPiA+ID4gPiBDYW4geW91IGJpc2VjdCBpdD8gSSBkb24ndCBoYXZlIGlu ZmluaWJhbmQgaGFyZHdhcmUgaGFuZHkuLi4NCj4gPiA+ID4gDQo+ID4gPiA+IEhlbGxvIEtlbnQs DQo+ID4gPiA+IA0KPiA+ID4gPiBIYXZlIHlvdSBub3RpY2VkIHRoYXQgdGhlIHRlc3QgSSBkZXNj cmliZWQgdXNlcyB0aGUgcmRtYV9yeGUgZHJpdmVyIGFuZCBoZW5jZSB0aGF0DQo+ID4gPiA+IG5v IEluZmluaUJhbmQgaGFyZHdhcmUgaXMgbmVlZGVkIHRvIHJ1biB0aGF0IHRlc3Q/DQo+ID4gPiAN Cj4gPiA+IE5vLCBJJ20gbm90IHRlcnJpYmx5IGZhbWlsaWFyIHdpdGggaW5maW5pYmFuZCBzdHVm Zi4uLi4NCj4gPiA+IA0KPiA+ID4gRG8geW91IGhhdmUgc29tZSBzb3J0IG9mIHNlbGYgY29udGFp bmVkIHRlc3QvcWVtdSByZWNpcGU/IEkgd291bGQgcmVhbGx5IHJhdGhlcg0KPiA+ID4gbm90IGhh dmUgdG8gZmlndXJlIG91dCBob3cgdG8gY29uZmlndXJlIG11bHRpcGF0aCwgYW5kIGluZmluaWJh bmQsIGFuZCBJJ20gbm90DQo+ID4gPiBldmVuIHN1cmUgd2hhdCBlbHNlIGlzIG5lZWRlZCBiYXNl ZCBvbiB0aGF0IHJlYWRtZS4uLg0KPiA+IA0KPiA+IFBsZWFzZSBoYXZlIGFub3RoZXIgbG9vayBh dCB0aGUgc3JwLXRlc3QgUkVBRE1FLiBUaGUgaW5zdHJ1Y3Rpb25zIGluIHRoYXQgZG9jdW1lbnQN Cj4gPiBhcmUgZWFzeSB0byBmb2xsb3cuIE5vIG11bHRpcGF0aCBub3IgYW55IEluZmluaUJhbmQg a25vd2xlZGdlIGlzIHJlcXVpcmVkLiBUaGUgdGVzdA0KPiA+IGV2ZW4gY2FuIGJlIHJ1biBpbiBh IHZpcnR1YWwgbWFjaGluZSBpbiBjYXNlIHlvdSB3b3VsZCBiZSB3b3JyaWVkIGFib3V0IHBvdGVu dGlhbA0KPiA+IGltcGFjdCBvZiB0aGUgdGVzdCBvbiB0aGUgcmVzdCBvZiB0aGUgc3lzdGVtLg0K PiANCj4gWW91ciByZWFkbWUgcmVmZXJzIHRvIGtlcm5lbCBjb25maWcgb3B0aW9ucyB0aGF0IGRv bid0IGV2ZW4gZXhpc3QgaW4gdGhlIGN1cnJlbnQNCj4ga2VybmVsDQoNClRoYXQncyBwcm9iYWJs eSBhIG1pc3VuZGVyc3RhbmRpbmcgb2YgeW91ciBzaWRlLiBGcm9tIGEgcXVpY2sgbG9vayBpdCBz ZWVtcyBsaWtlIGFsbA0KY29uZmlnIHN5bWJvbHMgbWVudGlvbmVkIGluIHRoZSBzcnAtdGVzdCBS RUFETUUubWQgZXhpc3QgaW4ga2VybmVsIHY0LjE3LXJjNi4gVGhlDQpmb2xsb3dpbmcgY29tbWFu ZCBkb2VzIG5vdCByZXBvcnQgYW55IG5vbi1leGlzdGluZyBLY29uZmlnIHN5bWJvbHM6DQoNCiQg Y2QgbGludXgta2VybmVsDQokIHNlZCAtbiAncy9eXCogQ09ORklHXy8vcCcgfi9zb2Z0d2FyZS9p bmZpbmliYW5kL3NycC10ZXN0L1JFQURNRS5tZCB8DQogIHdoaWxlIHJlYWQgZjsgZG8geyBnaXQg Z3JlcCAtbHcgIiRmIiB8IGdyZXAgLXEgS2NvbmZpZzsgfSB8fCBlY2hvICRmOyBkb25lDQoNCkJh cnQuDQoNCg0KDQo= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752642AbeETXLA (ORCPT ); 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charset="utf-8" Content-ID: <8C8959F83E50944CAA72E3305A7EE54F@namprd04.prod.outlook.com> MIME-Version: 1.0 X-MS-Office365-Filtering-Correlation-Id: da940363-a9bd-4f4e-7f0b-08d5bea6f002 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: da940363-a9bd-4f4e-7f0b-08d5bea6f002 X-MS-Exchange-CrossTenant-originalarrivaltime: 20 May 2018 23:10:54.2399 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR04MB0766 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id w4KNB530019903 On Sun, 2018-05-20 at 19:00 -0400, Kent Overstreet wrote: > On Sun, May 20, 2018 at 10:35:29PM +0000, Bart Van Assche wrote: > > On Sun, 2018-05-20 at 18:31 -0400, Kent Overstreet wrote: > > > On Sun, May 20, 2018 at 10:19:13PM +0000, Bart Van Assche wrote: > > > > On Sun, 2018-05-20 at 18:17 -0400, Kent Overstreet wrote: > > > > > On Fri, May 18, 2018 at 03:12:27PM +0000, Bart Van Assche wrote: > > > > > > On Fri, 2018-05-18 at 05:06 -0400, Kent Overstreet wrote: > > > > > > > On Thu, May 17, 2018 at 08:54:57PM +0000, Bart Van Assche wrote: > > > > > > > > With Jens' latest for-next branch I hit the kernel warning shown below. Can > > > > > > > > you have a look? > > > > > > > > > > > > > > Any hints on how to reproduce it? > > > > > > > > > > > > Sure. This is how I triggered it: > > > > > > * Clone https://github.com/bvanassche/srp-test. > > > > > > * Follow the instructions in README.md. > > > > > > * Run srp-test/run_tests -c -r 10 > > > > > > > > > > Can you bisect it? I don't have infiniband hardware handy... > > > > > > > > Hello Kent, > > > > > > > > Have you noticed that the test I described uses the rdma_rxe driver and hence that > > > > no InfiniBand hardware is needed to run that test? > > > > > > No, I'm not terribly familiar with infiniband stuff.... > > > > > > Do you have some sort of self contained test/qemu recipe? I would really rather > > > not have to figure out how to configure multipath, and infiniband, and I'm not > > > even sure what else is needed based on that readme... > > > > Please have another look at the srp-test README. The instructions in that document > > are easy to follow. No multipath nor any InfiniBand knowledge is required. The test > > even can be run in a virtual machine in case you would be worried about potential > > impact of the test on the rest of the system. > > Your readme refers to kernel config options that don't even exist in the current > kernel That's probably a misunderstanding of your side. From a quick look it seems like all config symbols mentioned in the srp-test README.md exist in kernel v4.17-rc6. The following command does not report any non-existing Kconfig symbols: $ cd linux-kernel $ sed -n 's/^\* CONFIG_//p' ~/software/infiniband/srp-test/README.md | while read f; do { git grep -lw "$f" | grep -q Kconfig; } || echo $f; done Bart.