From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757781AbbAIOjN (ORCPT ); Fri, 9 Jan 2015 09:39:13 -0500 Received: from mail-wi0-f171.google.com ([209.85.212.171]:56589 "EHLO mail-wi0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752739AbbAIOjL (ORCPT ); Fri, 9 Jan 2015 09:39:11 -0500 Message-ID: <54AFE664.6010002@profitbricks.com> Date: Fri, 09 Jan 2015 15:32:04 +0100 From: Sebastian Parschauer User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Jens Axboe CC: Eduardo Otubo , "linux-kernel@vger.kernel.org" , virtualization@lists.linux-foundation.org Subject: blk-mq v3.18: Oops during virtio_blk hot-unplug Content-Type: multipart/mixed; boundary="------------020408070804070601090307" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a multi-part message in MIME format. --------------020408070804070601090307 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Hi Jens, my colleague Eduardo is sporadically seeing an Oops in blk-mq while running continuous virtio_blk hot-plug/hot-unplug tests with I/O to the device within an x86_64 QEMU/KVM 2.0 Debian Wheezy VM. Please find the call trace attached and the full log here: http://paste.ubuntu.com/9691873/ The kernel image has been taken from here and is the mainline kernel from tag v3.18: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18-vivid/ Is there still an issue with block queue freezing? We are seeing a similar issue with v3.16 but more often as some block queue freezing fixes have been added in v3.17. All kernels without blk-mq used by virtio_blk (< v3.13) work fine. Cheers, Sebastian --------------020408070804070601090307 Content-Type: text/plain; charset=UTF-8; name="blk-mq_3.18_virtio_blk_hot-unplug_oops.txt" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="blk-mq_3.18_virtio_blk_hot-unplug_oops.txt" WyAgMTY1LjYzMDUwOF0gQlVHOiB1bmFibGUgdG8gaGFuZGxlIGtlcm5lbCBOVUxMIHBvaW50 ZXIgZGVyZWZlcmVuY2UgYXQgICAgICAgICAgIChudWxsKQpbICAxNjUuNjMxMDI3XSBJUDog WzxmZmZmZmZmZjgxN2IxMDM1Pl0gX19tdXRleF9sb2NrX3Nsb3dwYXRoKzB4NzUvMHgxMDAK WyAgMTY1LjYzMTIxOV0gUEdEIDM2OGEyMDY3IFBVRCA3OTdkMzA2NyBQTUQgMCAKWyAgMTY1 LjYzMTQ1NF0gT29wczogMDAwMiBbIzFdIFNNUCAKWyAgMTY1LjYzMTYzMl0gTW9kdWxlcyBs aW5rZWQgaW46IHBhcnBvcnRfcGMgODI1MF9maW50ZWsgcHZwYW5pYyBwYXJwb3J0IHNuZF9w Y20gc25kX3RpbWVyIHNuZCBzb3VuZGNvcmUgaTJjX3BpaXg0IGpveWRldiBwY3Nwa3IgcHNt b3VzZSBzZXJpb19yYXcgZXZidWcgbWFjX2hpZCBoaWRfZ2VuZXJpYyB1c2JoaWQgaGlkIGZs b3BweQpbICAxNjUuNjMyMDEwXSBDUFU6IDAgUElEOiAyMjgzOCBDb21tOiBkZCBOb3QgdGFp bnRlZCAzLjE4LjAtMDMxODAwLWdlbmVyaWMgIzIwMTQxMjA3MTkzNQpbICAxNjUuNjMyMDEw XSBIYXJkd2FyZSBuYW1lOiBRRU1VIFN0YW5kYXJkIFBDIChpNDQwRlggKyBQSUlYLCAxOTk2 KSwgQklPUyBCb2NocyAwMS8wMS8yMDExClsgIDE2NS42MzMwNDVdIHRhc2s6IGZmZmY4ODAw Njg1YjY0MDAgdGk6IGZmZmY4ODAwN2FmYzAwMDAgdGFzay50aTogZmZmZjg4MDA3YWZjMDAw MApbICAxNjUuNjMzMDQ1XSBSSVA6IDAwMTA6WzxmZmZmZmZmZjgxN2IxMDM1Pl0gIFs8ZmZm ZmZmZmY4MTdiMTAzNT5dIF9fbXV0ZXhfbG9ja19zbG93cGF0aCsweDc1LzB4MTAwClsgIDE2 NS42MzMwNDVdIFJTUDogMDAxODpmZmZmODgwMDdhZmMzYzM4ICBFRkxBR1M6IDAwMDEwMjk3 ClsgIDE2NS42MzMwNDVdIFJBWDogMDAwMDAwMDAwMDAwMDAwMCBSQlg6IGZmZmY4ODAwMzZi MWZhMDggUkNYOiAwMDAwMDAwMGMwMDAwMTAwClsgIDE2NS42MzMwNDVdIFJEWDogZmZmZjg4 MDA3YWZjM2M0MCBSU0k6IGZmZmY4ODAwNjg1YjY0MDAgUkRJOiBmZmZmODgwMDM2YjFmYTBj ClsgIDE2NS42MzMwNDVdIFJCUDogZmZmZjg4MDA3YWZjM2M4OCBSMDg6IGZmZmY4ODAwN2Fm YzAwMDAgUjA5OiAwMDAwMDAwMDAwMDAwMDAwClsgIDE2NS42MzMwNDVdIFIxMDogMDAwMDAw MDAwMDAwMDAwMSBSMTE6IDAwMDAwMDAwMDAwMDAyNDYgUjEyOiBmZmZmODgwMDY4NWI2NDAw ClsgIDE2NS42MzMwNDVdIFIxMzogZmZmZjg4MDAzNmIxZmEwYyBSMTQ6IDAwMDAwMDAwZmZm ZmZmZmYgUjE1OiBmZmZmODgwMDM2YjFmYTEwClsgIDE2NS42MzMwNDVdIEZTOiAgMDAwMDdm Y2UzOTM1MjcwMCgwMDAwKSBHUzpmZmZmODgwMDdmYzAwMDAwKDAwMDApIGtubEdTOjAwMDAw MDAwMDAwMDAwMDAKWyAgMTY1LjYzMzA0NV0gQ1M6ICAwMDEwIERTOiAwMDAwIEVTOiAwMDAw IENSMDogMDAwMDAwMDA4MDA1MDAzMwpbICAxNjUuNjMzMDQ1XSBDUjI6IDAwMDAwMDAwMDAw MDAwMDAgQ1IzOiAwMDAwMDAwMDdhZTViMDAwIENSNDogMDAwMDAwMDAwMDA0MDZmMApbICAx NjUuNjMzMDQ1XSBTdGFjazoKWyAgMTY1LjYzMzA0NV0gIGZmZmY4ODAwMzZkNTUyZDggZmZm Zjg4MDAzNmIxZmExMCAwMDAwMDAwMDAwMDAwMDAwIGZmZmY4ODAwN2I1Y2YwYzAKWyAgMTY1 LjYzMzA0NV0gIGZmZmY4ODAwN2FmYzNjOTggZmZmZjg4MDAzNmIxZmEwOCBmZmZmODgwMDM2 ZDU1MmQ4IGZmZmY4ODAwMzZiMWY5ZDAKWyAgMTY1LjYzMzA0NV0gIGZmZmY4ODAwNzk1ZjMw MDAgZmZmZjg4MDA3YjVjZjBjMCBmZmZmODgwMDdhZmMzY2E4IGZmZmZmZmZmODE3YjEwZTMK WyAgMTY1LjYzMzA0NV0gQ2FsbCBUcmFjZToKWyAgMTY1LjYzMzA0NV0gIFs8ZmZmZmZmZmY4 MTdiMTBlMz5dIG11dGV4X2xvY2srMHgyMy8weDM3ClsgIDE2NS42MzMwNDVdICBbPGZmZmZm ZmZmODEzNzk3MDY+XSBibGtfbXFfZnJlZV9xdWV1ZSsweDI2LzB4MWEwClsgIDE2NS42MzMw NDVdICBbPGZmZmZmZmZmODEzNmZlMjI+XSBibGtfcmVsZWFzZV9xdWV1ZSsweGEyLzB4MTAw ClsgIDE2NS42MzMwNDVdICBbPGZmZmZmZmZmODEzOWY4YTI+XSBrb2JqZWN0X2NsZWFudXAr MHg4Mi8weDFjMApbICAxNjUuNjMzMDQ1XSAgWzxmZmZmZmZmZjgxMzlmNzMwPl0ga29iamVj dF9wdXQrMHgzMC8weDcwClsgIDE2NS42MzMwNDVdICBbPGZmZmZmZmZmODEzNjk0OTU+XSBi bGtfcHV0X3F1ZXVlKzB4MTUvMHgyMApbICAxNjUuNjMzMDQ1XSAgWzxmZmZmZmZmZjgxMzdl MDMzPl0gZGlza19yZWxlYXNlKzB4OTMvMHhkMApbICAxNjUuNjMzMDQ1XSAgWzxmZmZmZmZm ZjgxNGQyN2RlPl0gZGV2aWNlX3JlbGVhc2UrMHgzZS8weGMwClsgIDE2NS42MzMwNDVdICBb PGZmZmZmZmZmODEzOWY4YTI+XSBrb2JqZWN0X2NsZWFudXArMHg4Mi8weDFjMApbICAxNjUu NjMzMDQ1XSAgWzxmZmZmZmZmZjgxMzlmNzMwPl0ga29iamVjdF9wdXQrMHgzMC8weDcwClsg IDE2NS42MzMwNDVdICBbPGZmZmZmZmZmODEzN2M3OTc+XSBwdXRfZGlzaysweDE3LzB4MjAK WyAgMTY1LjYzMzA0NV0gIFs8ZmZmZmZmZmY4MTIyNzhhNT5dIF9fYmxrZGV2X3B1dCsweDEy NS8weDFiMApbICAxNjUuNjMzMDQ1XSAgWzxmZmZmZmZmZjgxMjI3OThiPl0gYmxrZGV2X3B1 dCsweDViLzB4MTYwClsgIDE2NS42MzMwNDVdICBbPGZmZmZmZmZmODEyMjdhYjU+XSBibGtk ZXZfY2xvc2UrMHgyNS8weDMwClsgIDE2NS42MzMwNDVdICBbPGZmZmZmZmZmODExZjEyOWQ+ XSBfX2ZwdXQrMHhiZC8weDI1MApbICAxNjUuNjMzMDQ1XSAgWzxmZmZmZmZmZjgxMWYxNDdl Pl0gX19fX2ZwdXQrMHhlLzB4MTAKWyAgMTY1LjYzMzA0NV0gIFs8ZmZmZmZmZmY4MTA5MWJj Nz5dIHRhc2tfd29ya19ydW4rMHhhNy8weGUwClsgIDE2NS42MzMwNDVdICBbPGZmZmZmZmZm ODEwMTQwNzc+XSBkb19ub3RpZnlfcmVzdW1lKzB4YzcvMHhkMApbICAxNjUuNjMzMDQ1XSAg WzxmZmZmZmZmZjgxN2IzNTRmPl0gaW50X3NpZ25hbCsweDEyLzB4MTcKWyAgMTY1LjYzMzA0 NV0gQ29kZTogMDAgMDAgOGIgMDMgODMgZjggMDEgMGYgODQgOTkgMDAgMDAgMDAgNDggOGIg NDMgMTAgNDggOGQgNTUgYjggNGMgOGQgN2IgMDggNDEgYmUgZmYgZmYgZmYgZmYgNDggODkg NTMgMTAgNGMgODkgN2QgYjggNDggODkgNDUgYzAgPDQ4PiA4OSAxMCA0YyA4OSA2NSBjOCBl YiAxZiA2NiA5MCA0YyA4OSBlZiA0OSBjNyAwNCAyNCAwMiAwMCAwMCAKWyAgMTY1LjYzMzA0 NV0gUklQICBbPGZmZmZmZmZmODE3YjEwMzU+XSBfX211dGV4X2xvY2tfc2xvd3BhdGgrMHg3 NS8weDEwMApbICAxNjUuNjMzMDQ1XSAgUlNQIDxmZmZmODgwMDdhZmMzYzM4PgpbICAxNjUu NjMzMDQ1XSBDUjI6IDAwMDAwMDAwMDAwMDAwMDAK --------------020408070804070601090307--