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[84.33.64.52]) by smtp.gmail.com with ESMTPSA id 5sm1645644wmg.42.2019.08.08.03.21.48 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 08 Aug 2019 03:21:48 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.8\)) Subject: Re: RIP: e030:bfq_exit_icq_bfqq+0x147/0x1c0 From: Paolo Valente In-Reply-To: <1d2e8bf8-902e-3e3c-ce0f-78efedf82209@eikelenboom.it> Date: Thu, 8 Aug 2019 12:21:47 +0200 Cc: Jens Axboe , Douglas Anderson , linux-kernel Content-Transfer-Encoding: quoted-printable Message-Id: References: <6cfd07de-f5a8-78ea-405a-0243061cb620@eikelenboom.it> <6A27F793-838B-4329-8C26-8768ED9BBD8A@linaro.org> <1d2e8bf8-902e-3e3c-ce0f-78efedf82209@eikelenboom.it> To: Sander Eikelenboom X-Mailer: Apple Mail (2.3445.104.8) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Il giorno 8 ago 2019, alle ore 12:21, Sander Eikelenboom = ha scritto: >=20 > On 08/08/2019 11:10, Paolo Valente wrote: >>=20 >>=20 >>> Il giorno 8 ago 2019, alle ore 11:05, Sander Eikelenboom = ha scritto: >>>=20 >>> L.S., >>>=20 >>> While testing a linux 5.3-rc3 kernel on my Xen server I come across = the splat below when trying to shutdown all the VM's. >>> This is after the server has ran for a few days without any problem. = It seems to happen consistently. >>>=20 >>> It seems it's in the same area as = dbc3117d4ca9e17819ac73501e914b8422686750, but already rc3 incorporates = that patch. >>>=20 >>> Any ideas ? >>>=20 >>=20 >> Could you try these fixes I proposed yesterday: >> https://lkml.org/lkml/2019/8/7/536 >> or, on patchwork: >> https://patchwork.kernel.org/patch/11082247/ >> https://patchwork.kernel.org/patch/11082249/ >=20 > Hi Paolo, >=20 > These two above seem to fix the issue ! > So thanks for the swift reply (and the patchwork links for easy > downloading the patches). >=20 > I will test the third unrelated patch as well, but if you don't hear > back , it's all good. >=20 Great! Thank you for offering to test also the other patch. Tested-by = are welcome too :) Thanks, Paolo > Thanks again ! >=20 > -- > Sander >=20 >> I posted a further fix too, which should be unrelated. But, just in = case: >> https://lkml.org/lkml/2019/8/7/715 >> or, on patchwork: >> https://patchwork.kernel.org/patch/11082521/ >>=20 >> Crossing my fingers (and think you for reporting this), >> Paolo >>=20 >>> -- >>> Sander >>>=20 >>>=20 >>> [80915.716048] BUG: unable to handle page fault for address: = 0000100000000008 >>> [80915.724188] #PF: supervisor write access in kernel mode >>> [80915.733182] #PF: error_code(0x0002) - not-present page >>> [80915.741455] PGD 0 P4D 0=20 >>> [80915.750538] Oops: 0002 [#1] SMP NOPTI >>> [80915.758425] CPU: 4 PID: 11407 Comm: 17.hda-2 Tainted: G W = 5.3.0-rc3-20190807-doflr+ #1 >>> [80915.766137] Hardware name: MSI MS-7640/890FXA-GD70 (MS-7640) , = BIOS V1.8B1 09/13/2010 >>> [80915.773737] RIP: e030:bfq_exit_icq_bfqq+0x147/0x1c0 >>> [80915.781294] Code: 00 00 00 00 00 00 48 0f ba b0 20 01 00 00 0c 48 = 8b 88 f0 01 00 00 48 85 c9 74 29 48 8b b0 e8 01 00 00 48 89 31 48 85 f6 = 74 04 <48> 89 4e 08 48 c7 80 e8 01 00 00 00 00 00 00 48 c7 80 f0 01 00 = 00 >>> [80915.796792] RSP: e02b:ffffc9000473be28 EFLAGS: 00010006 >>> [80915.804419] RAX: ffff888070393200 RBX: ffff888076c4a800 RCX: = ffff888076c4a9f8 >>> [80915.810254] device vif17.0 left promiscuous mode >>> [80915.811906] RDX: 0000100000000000 RSI: 0000100000000000 RDI: = 0000000000000000 >>> [80915.811908] RBP: ffff888077efc398 R08: 0000000000000004 R09: = ffffffff81106800 >>> [80915.811909] R10: ffff88807804ca40 R11: ffffc9000473be31 R12: = ffff888005256bf0 >>> [80915.811909] R13: 0000000000000000 R14: ffff888005256800 R15: = ffffffff82a6a3c0 >>> [80915.811919] FS: 00007f1c30a8dbc0(0000) GS:ffff88807d500000(0000) = knlGS:0000000000000000 >>> [80915.819456] xen_bridge: port 18(vif17.0) entered disabled state >>> [80915.826569] CS: 10000e030 DS: 0000 ES: 0000 CR0: = 0000000080050033 >>> [80915.826571] CR2: 0000100000000008 CR3: 000000005d9d0000 CR4: = 0000000000000660 >>> [80915.826575] Call Trace: >>> [80915.826592] bfq_exit_icq+0xe/0x20 >>> [80915.826595] put_io_context_active+0x52/0x80 >>> [80915.826599] do_exit+0x774/0xac0 >>> [80915.906037] ? xen_blkif_be_int+0x30/0x30 >>> [80915.913311] kthread+0xda/0x130 >>> [80915.920398] ? kthread_park+0x80/0x80 >>> [80915.927524] ret_from_fork+0x22/0x40 >>> [80915.934512] Modules linked in: >>> [80915.941412] CR2: 0000100000000008 >>> [80915.948221] ---[ end trace 61315493e0f8ef40 ]--- >>> [80915.954984] RIP: e030:bfq_exit_icq_bfqq+0x147/0x1c0 >>> [80915.961850] Code: 00 00 00 00 00 00 48 0f ba b0 20 01 00 00 0c 48 = 8b 88 f0 01 00 00 48 85 c9 74 29 48 8b b0 e8 01 00 00 48 89 31 48 85 f6 = 74 04 <48> 89 4e 08 48 c7 80 e8 01 00 00 00 00 00 00 48 c7 80 f0 01 00 = 00 >>> [80915.976124] RSP: e02b:ffffc9000473be28 EFLAGS: 00010006 >>> [80915.983205] RAX: ffff888070393200 RBX: ffff888076c4a800 RCX: = ffff888076c4a9f8 >>> [80915.990321] RDX: 0000100000000000 RSI: 0000100000000000 RDI: = 0000000000000000 >>> [80915.997319] RBP: ffff888077efc398 R08: 0000000000000004 R09: = ffffffff81106800 >>> [80916.004427] R10: ffff88807804ca40 R11: ffffc9000473be31 R12: = ffff888005256bf0 >>> [80916.011525] R13: 0000000000000000 R14: ffff888005256800 R15: = ffffffff82a6a3c0 >>> [80916.018679] FS: 00007f1c30a8dbc0(0000) GS:ffff88807d500000(0000) = knlGS:0000000000000000 >>> [80916.025897] CS: 10000e030 DS: 0000 ES: 0000 CR0: = 0000000080050033 >>> [80916.033116] CR2: 0000100000000008 CR3: 000000005d9d0000 CR4: = 0000000000000660 >>> [80916.040348] Fixing recursive fault but reboot is needed!