Xen project Mailing List

Re: [Xen-devel] One-off crash on staging d36b770458

To: Wei Liu <wei.liu2@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>

From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Date: Fri, 5 Oct 2018 12:06:26 +0100

Autocrypt: addr=andrew.cooper3@xxxxxxxxxx; prefer-encrypt=mutual; keydata= xsFNBFLhNn8BEADVhE+Hb8i0GV6mihnnr/uiQQdPF8kUoFzCOPXkf7jQ5sLYeJa0cQi6Penp VtiFYznTairnVsN5J+ujSTIb+OlMSJUWV4opS7WVNnxHbFTPYZVQ3erv7NKc2iVizCRZ2Kxn srM1oPXWRic8BIAdYOKOloF2300SL/bIpeD+x7h3w9B/qez7nOin5NzkxgFoaUeIal12pXSR Q354FKFoy6Vh96gc4VRqte3jw8mPuJQpfws+Pb+swvSf/i1q1+1I4jsRQQh2m6OTADHIqg2E ofTYAEh7R5HfPx0EXoEDMdRjOeKn8+vvkAwhviWXTHlG3R1QkbE5M/oywnZ83udJmi+lxjJ5 YhQ5IzomvJ16H0Bq+TLyVLO/VRksp1VR9HxCzItLNCS8PdpYYz5TC204ViycobYU65WMpzWe LFAGn8jSS25XIpqv0Y9k87dLbctKKA14Ifw2kq5OIVu2FuX+3i446JOa2vpCI9GcjCzi3oHV e00bzYiHMIl0FICrNJU0Kjho8pdo0m2uxkn6SYEpogAy9pnatUlO+erL4LqFUO7GXSdBRbw5 gNt25XTLdSFuZtMxkY3tq8MFss5QnjhehCVPEpE6y9ZjI4XB8ad1G4oBHVGK5LMsvg22PfMJ ISWFSHoF/B5+lHkCKWkFxZ0gZn33ju5n6/FOdEx4B8cMJt+cWwARAQABzSlBbmRyZXcgQ29v cGVyIDxhbmRyZXcuY29vcGVyM0BjaXRyaXguY29tPsLBegQTAQgAJAIbAwULCQgHAwUVCgkI CwUWAgMBAAIeAQIXgAUCWKD95wIZAQAKCRBlw/kGpdefoHbdD/9AIoR3k6fKl+RFiFpyAhvO 59ttDFI7nIAnlYngev2XUR3acFElJATHSDO0ju+hqWqAb8kVijXLops0gOfqt3VPZq9cuHlh IMDquatGLzAadfFx2eQYIYT+FYuMoPZy/aTUazmJIDVxP7L383grjIkn+7tAv+qeDfE+txL4 SAm1UHNvmdfgL2/lcmL3xRh7sub3nJilM93RWX1Pe5LBSDXO45uzCGEdst6uSlzYR/MEr+5Z JQQ32JV64zwvf/aKaagSQSQMYNX9JFgfZ3TKWC1KJQbX5ssoX/5hNLqxMcZV3TN7kU8I3kjK mPec9+1nECOjjJSO/h4P0sBZyIUGfguwzhEeGf4sMCuSEM4xjCnwiBwftR17sr0spYcOpqET ZGcAmyYcNjy6CYadNCnfR40vhhWuCfNCBzWnUW0lFoo12wb0YnzoOLjvfD6OL3JjIUJNOmJy RCsJ5IA/Iz33RhSVRmROu+TztwuThClw63g7+hoyewv7BemKyuU6FTVhjjW+XUWmS/FzknSi dAG+insr0746cTPpSkGl3KAXeWDGJzve7/SBBfyznWCMGaf8E2P1oOdIZRxHgWj0zNr1+ooF /PzgLPiCI4OMUttTlEKChgbUTQ+5o0P080JojqfXwbPAyumbaYcQNiH1/xYbJdOFSiBv9rpt TQTBLzDKXok86M7BTQRS4TZ/ARAAkgqudHsp+hd82UVkvgnlqZjzz2vyrYfz7bkPtXaGb9H4 Rfo7mQsEQavEBdWWjbga6eMnDqtu+FC+qeTGYebToxEyp2lKDSoAsvt8w82tIlP/EbmRbDVn 7bhjBlfRcFjVYw8uVDPptT0TV47vpoCVkTwcyb6OltJrvg/QzV9f07DJswuda1JH3/qvYu0p vjPnYvCq4NsqY2XSdAJ02HrdYPFtNyPEntu1n1KK+gJrstjtw7KsZ4ygXYrsm/oCBiVW/OgU g/XIlGErkrxe4vQvJyVwg6YH653YTX5hLLUEL1NS4TCo47RP+wi6y+TnuAL36UtK/uFyEuPy wwrDVcC4cIFhYSfsO0BumEI65yu7a8aHbGfq2lW251UcoU48Z27ZUUZd2Dr6O/n8poQHbaTd 6bJJSjzGGHZVbRP9UQ3lkmkmc0+XCHmj5WhwNNYjgbbmML7y0fsJT5RgvefAIFfHBg7fTY/i kBEimoUsTEQz+N4hbKwo1hULfVxDJStE4sbPhjbsPCrlXf6W9CxSyQ0qmZ2bXsLQYRj2xqd1 bpA+1o1j2N4/au1R/uSiUFjewJdT/LX1EklKDcQwpk06Af/N7VZtSfEJeRV04unbsKVXWZAk uAJyDDKN99ziC0Wz5kcPyVD1HNf8bgaqGDzrv3TfYjwqayRFcMf7xJaL9xXedMcAEQEAAcLB XwQYAQgACQUCUuE2fwIbDAAKCRBlw/kGpdefoG4XEACD1Qf/er8EA7g23HMxYWd3FXHThrVQ HgiGdk5Yh632vjOm9L4sd/GCEACVQKjsu98e8o3ysitFlznEns5EAAXEbITrgKWXDDUWGYxd pnjj2u+GkVdsOAGk0kxczX6s+VRBhpbBI2PWnOsRJgU2n10PZ3mZD4Xu9kU2IXYmuW+e5KCA vTArRUdCrAtIa1k01sPipPPw6dfxx2e5asy21YOytzxuWFfJTGnVxZZSCyLUO83sh6OZhJkk b9rxL9wPmpN/t2IPaEKoAc0FTQZS36wAMOXkBh24PQ9gaLJvfPKpNzGD8XWR5HHF0NLIJhgg 4ZlEXQ2fVp3XrtocHqhu4UZR4koCijgB8sB7Tb0GCpwK+C4UePdFLfhKyRdSXuvY3AHJd4CP 4JzW0Bzq/WXY3XMOzUTYApGQpnUpdOmuQSfpV9MQO+/jo7r6yPbxT7CwRS5dcQPzUiuHLK9i nvjREdh84qycnx0/6dDroYhp0DFv4udxuAvt1h4wGwTPRQZerSm4xaYegEFusyhbZrI0U9tJ B8WrhBLXDiYlyJT6zOV2yZFuW47VrLsjYnHwn27hmxTC/7tvG3euCklmkn9Sl9IAKFu29RSo d5bD8kMSCYsTqtTfT6W4A3qHGvIDta3ptLYpIAOD2sY3GYq2nf3Bbzx81wZK14JdDDHUX2Rs 6+ahAA==

Cc: Jan Beulich <JBeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>

Delivery-date: Fri, 05 Oct 2018 11:06:37 +0000

List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

Openpgp: preference=signencrypt

On 05/10/18 11:48, Wei Liu wrote: > Got this one-off crash while booting staging (d36b770458) on a skylake > server. After rebooting it went away. > > (XEN) Assertion '(sp == 0) || (peoi[sp-1].vector < vector)' failed at > irq.c:1173 > (XEN) ----[ Xen-4.12-unstable x86_64 debug=y Tainted: C ]---- > > (XEN) CPU: 5 > > (XEN) RIP: e008:[<ffff82d080286921>] do_IRQ+0x496/0x680 > > (XEN) RFLAGS: 0000000000010046 CONTEXT: hypervisor > > (XEN) rax: ffff83085df7a4c0 rbx: ffff83085df81e00 rcx: 0000000000000001 > > (XEN) rdx: 0000000000000021 rsi: 0000000000000021 rdi: 0000000000000001 > > (XEN) rbp: ffff83085df77d98 rsp: ffff83085df77d38 r8: 0000000000000021 > > (XEN) r9: 0000000000000000 r10: 0000000000000000 r11: 0000000000000000 > > (XEN) r12: ffff8308740e4f10 r13: 0000000000000021 r14: ffff83085df81e00 > > (XEN) r15: 000000000000001e cr0: 0000000080050033 cr4: 00000000003526e0 > > (XEN) cr3: 000000085da9e000 cr2: 00007fc5b6a8cfe8 > > (XEN) fsb: 0000000000000000 gsb: 0000000000000000 gss: 0000000000000000 > > (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: 0000 cs: e008 > > (XEN) Xen code around <ffff82d080286921> (do_IRQ+0x496/0x680): > > (XEN) be 00 00 00 7e 93 0f 0b <0f> 0b 0f 0b 0f 0b b8 00 00 00 00 eb 4e 83 bb > 1c > (XEN) Xen stack trace from rsp=ffff83085df77d38: > > (XEN) ffff82d000000000 ffff83085df81e24 0000000000000000 0000001e8037a835 > > (XEN) ffff82d08037a841 ffff82d08037a835 ffff82d08037a841 0000000000000000 > > (XEN) 0000000000000000 0000000000000000 ffff83085df77fff 0000000000000000 > > (XEN) 00007cf7a2088237 ffff82d08037a8aa 0000000380f0b241 0000000000000008 > > (XEN) ffff83085df79448 ffff83085df79390 ffff83085df77ec0 0000000380f62e26 > > (XEN) 00000003810cc680 ffff8307de5670a8 00000000001f644f 0000000000000809 > > (XEN) ffff83085df7a02c 0000000000000000 ffff83085df77fff 00000000000051f3 > > (XEN) ffff83085df793c0 0000002100000000 ffff82d0802e1684 000000000000e008 > > (XEN) 0000000000000202 ffff83085df77e50 0000000000000000 ffff82d08059bc80 > > (XEN) 00000020ffffffff ffff83085df77fff ffff82d0805a3c80 ffff83085df77eb0 > > (XEN) 0000000000000000 0000000000000000 0000033b00000212 ffff82d08059bf00 > > (XEN) 0000000000000005 ffff82d08059bf00 0000000000000005 0000000000000005 > > (XEN) ffff83085df39000 ffff83085df77ef0 ffff82d0802770b8 ffff830864159000 > > (XEN) ffff8300791fd000 ffff8300791fb000 ffff830864159000 ffff83085df77db8 > > (XEN) 0000000000000000 0000000000000000 ffff88017dbe3d00 ffff88017dbe3d00 > > (XEN) 0000000000000002 0000000000000002 0000000000000000 0000000000000000 > > (XEN) 0000000148106000 000000005236fe09 ffffffff816fe980 ffff880182a9a7c0 > > (XEN) ffffffff82049af8 ffff880182a9a7c0 0000000000000082 0000beef0000beef > > (XEN) ffffffff816fec52 000000bf0000beef 0000000000000246 ffffc900006dbe98 > > (XEN) 000000000000beef 000000000000beef 000000000000beef 000000000000beef > > (XEN) Xen call trace: > > (XEN) [<ffff82d080286921>] do_IRQ+0x496/0x680 > > (XEN) [<ffff82d08037a8aa>] common_interrupt+0x10a/0x120 > > (XEN) [<ffff82d0802e1684>] mwait-idle.c#mwait_idle+0x296/0x372 > > (XEN) [<ffff82d0802770b8>] domain.c#idle_loop+0xb3/0xb5 > > (XEN) > > (XEN) > > (XEN) **************************************** > > (XEN) Panic on CPU 5: > > (XEN) Assertion '(sp == 0) || (peoi[sp-1].vector < vector)' failed at > irq.c:1173 > (XEN) **************************************** > > (XEN) > > (XEN) Manual reset required ('noreboot' specified) > > Let me know what else is needed. We've seen this reported sporadically in the past, and never with enough information to investigate. I had one reliable repro of the issue in the past, which disappeared with a microcode update. It is always out of mwait, and Xen's logic for which interrupts are pending now disagrees with hardware. This means we've seen an interrupt at a lower priority that one we believe to be pending, which is (to a first approximation), a violation of LAPIC priority logic. Perhaps I should insert a tonne of debugging in place of this assertion, with the hope that the next time we randomly encounter it, we've got some better idea of what is going on. ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel

©2013 Xen Project, A Linux Foundation Collaborative Project. All Rights Reserved.
Linux Foundation is a registered trademark of The Linux Foundation.
Xen Project is a trademark of The Linux Foundation.