[Xen-devel] ARM64 DOM0 crashing after commit 578270b "block: fix segment split"
Hello, I've been trying the Linux 4.4-rc3 on mustang (ARM64) with Xen. DOM0 is crashing as soon as a guest is started when QDISK is used for the disk: [ cut here ] WARNING: at /home/julien/works/linux/block/blk-merge.c:435 Modules linked in: CPU: 6 PID: 0 Comm: swapper/6 Not tainted 4.4.0-rc3 #276 Hardware name: APM X-Gene Mustang board (DT) task: ffc1f6d13700 ti: ffc1f6d2c000 task.ti: ffc1f6d2c000 PC is at blk_rq_map_sg+0x3dc/0x4a4 LR is at blk_rq_map_sg+0x454/0x4a4 pc : [] lr : [] pstate: 21c5 sp : ffc1f6d2f8a0 x29: ffc1f6d2f8a0 x28: 0020 x27: ffc1f5ccc000 x26: ffc1f6166740 x25: 000b x24: ffc0fa11e000 x23: ffc1f6166740 x22: ffc1f5ccc1f0 x21: x20: x19: x18: 0007 x17: 000e x16: 0001 x15: 0019 x14: 0033 x13: 004c x12: 0068 x11: ffc1f6d2fbd0 x10: ffc1f62e x9 : x8 : ffc1f6166740 x7 : x6 : x5 : 1000 x4 : 1000 x3 : 1000 x2 : 0042f2e4c000 x1 : x0 : 000a ---[ end trace 247f3acfda1a2560 ]--- Call trace: [] blk_rq_map_sg+0x3dc/0x4a4 [] scsi_init_sgtable+0x70/0xd8 [] scsi_init_io+0x38/0x108 [] sd_init_command+0x44/0x9c4 [] scsi_setup_cmnd+0xc8/0x11c [] scsi_prep_fn+0xb8/0x138 [] blk_peek_request+0x150/0x204 [] scsi_request_fn+0x4c/0x5ac [] __blk_run_queue+0x34/0x4c [] blk_run_queue+0x24/0x3c [] scsi_run_queue+0x204/0x290 [] scsi_end_request+0x128/0x188 [] scsi_io_completion+0x98/0x514 [] scsi_finish_command+0xc4/0x110 [] scsi_softirq_done+0x130/0x160 [] blk_done_softirq+0x7c/0x94 [] __do_softirq+0xfc/0x200 [] irq_exit+0x84/0xd8 [] handle_IPI+0x104/0x19c [] gic_handle_irq+0x84/0x9c Exception stack(0xffc1f6d2fe00 to 0xffc1f6d2ff20) fe00: ffc000966000 ffc000966a68 ffc1f6d2ff50 ffc867f0 fe20: 6145 000a489e3200 fe40: 0001 ffc00096a000 0001 ffc1fff9a048 fe60: ffc1f6fbef08 ffc1fff9a188 0594 ffc1f6d2fec0 fe80: 0740 ffc1f6276370 0018 0003e800 fea0: 000a9e23fc00 ffc0001a34d4 007f8a8d2820 fec0: 007f89432760 ffc000966000 ffc000966a68 ffc000946ac0 fee0: ffc1f6d2ff70 ffc00094a1e8 ffc000677978 ffc000966000 ff00: ffc1f6d2c000 ffc1f6d2ff50 [] el1_irq+0x68/0xd8 [] default_idle_call+0x1c/0x30 [] cpu_startup_entry+0x1c8/0x218 [] secondary_start_kernel+0x11c/0x140 [<0041000827ec>] 0x41000827ec [ cut here ] kernel BUG at /home/julien/works/linux/drivers/scsi/scsi_lib.c:1096! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP Modules linked in: CPU: 6 PID: 0 Comm: swapper/6 Tainted: GW 4.4.0-rc3 #276 Hardware name: APM X-Gene Mustang board (DT) task: ffc1f6d13700 ti: ffc1f6d2c000 task.ti: ffc1f6d2c000 PC is at scsi_init_sgtable+0xc0/0xd8 LR is at scsi_init_sgtable+0x70/0xd8 pc : [] lr : [] pstate: 21c5 sp : ffc1f6d2f950 x29: ffc1f6d2f950 x28: ffc000848aa8 x27: ffc000808270 x26: ffc1f5cd8000 x25: ffc1f6e68830 x24: 00034000 x23: ffc1f6e68800 x22: x21: x20: ffc0fa11e000 x19: ffc0fa25b2c0 x18: 0007 x17: 000e x16: 0001 x15: 0019 x14: 0033 x13: 004c x12: 0068 x11: ffc1f6d2fbd0 x10: ffc1f62e x9 : x8 : ffc1f6166740 x7 : x6 : x5 : 1000 x4 : 1000 x3 : 1000 x2 : 0042f2e4c000 x1 : 000a x0 : 000b Process swapper/6 (pid: 0, stack limit = 0xffc1f6d2c020) Stack: (0xffc1f6d2f950 to 0xffc1f6d3) f940: ffc1f6d2f980 ffc000473bd4 f960: ffc0fa11e000 ffc0fa11e000 ffc0fa25b200 ffc000483838 f980: ffc1f6d2f9c0 ffc00047c858 ffc0fa11e000 ffc1f6e68800 f9a0: ffc1f62e 0acdc310 ffc1f5cd9400 ffc0faa64800 f9c0: ffc1f6d2fa30 ffc000473d6c ffc0fa25b200 ffc1f6e68968 f9e0: ffc1f62e ffc1f6e68800 ffc1f62e ffc1f6ff6d70 fa00: ffc1f6e68830 ffc1f6e68800 ffc1f6d2fa20 ffc00046d408 fa20: ffc1f6d2fa60 ffc000473ee8 ffc1f6d2fa60 ffc000473e78 fa40: ffc0fa11e000 ffc1f6e68800 ffc1f62e ffc1f6ff6d70 fa60: ffc1f6d2fa90 ffc00035739c ffc1f62e ffc0fa11e000 fa80: ffc0fa8d9100 0080 ffc1f6d2fac0 ffc000474850 faa0: ffc1f6e68800 ffc0faa64800 ffc0fab6ed80 ffc1f6e68850 fac0: ffc1f6d2fb30 ffc000353978 ffc1f62e ffc1f5cd8028
Re: [Xen-devel] ARM64 DOM0 crashing after commit 578270b "block: fix segment split"
On 11/30/2015 11:22 AM, Julien Grall wrote: Hello, I've been trying the Linux 4.4-rc3 on mustang (ARM64) with Xen. DOM0 is crashing as soon as a guest is started when QDISK is used for the disk: [ cut here ] WARNING: at /home/julien/works/linux/block/blk-merge.c:435 Modules linked in: CPU: 6 PID: 0 Comm: swapper/6 Not tainted 4.4.0-rc3 #276 Hardware name: APM X-Gene Mustang board (DT) task: ffc1f6d13700 ti: ffc1f6d2c000 task.ti: ffc1f6d2c000 PC is at blk_rq_map_sg+0x3dc/0x4a4 LR is at blk_rq_map_sg+0x454/0x4a4 pc : [] lr : [] pstate: 21c5 sp : ffc1f6d2f8a0 x29: ffc1f6d2f8a0 x28: 0020 x27: ffc1f5ccc000 x26: ffc1f6166740 x25: 000b x24: ffc0fa11e000 x23: ffc1f6166740 x22: ffc1f5ccc1f0 x21: x20: x19: x18: 0007 x17: 000e x16: 0001 x15: 0019 x14: 0033 x13: 004c x12: 0068 x11: ffc1f6d2fbd0 x10: ffc1f62e x9 : x8 : ffc1f6166740 x7 : x6 : x5 : 1000 x4 : 1000 x3 : 1000 x2 : 0042f2e4c000 x1 : x0 : 000a ---[ end trace 247f3acfda1a2560 ]--- Call trace: [] blk_rq_map_sg+0x3dc/0x4a4 [] scsi_init_sgtable+0x70/0xd8 [] scsi_init_io+0x38/0x108 [] sd_init_command+0x44/0x9c4 [] scsi_setup_cmnd+0xc8/0x11c [] scsi_prep_fn+0xb8/0x138 [] blk_peek_request+0x150/0x204 [] scsi_request_fn+0x4c/0x5ac [] __blk_run_queue+0x34/0x4c [] blk_run_queue+0x24/0x3c [] scsi_run_queue+0x204/0x290 [] scsi_end_request+0x128/0x188 [] scsi_io_completion+0x98/0x514 [] scsi_finish_command+0xc4/0x110 [] scsi_softirq_done+0x130/0x160 [] blk_done_softirq+0x7c/0x94 [] __do_softirq+0xfc/0x200 [] irq_exit+0x84/0xd8 [] handle_IPI+0x104/0x19c [] gic_handle_irq+0x84/0x9c Exception stack(0xffc1f6d2fe00 to 0xffc1f6d2ff20) fe00: ffc000966000 ffc000966a68 ffc1f6d2ff50 ffc867f0 fe20: 6145 000a489e3200 fe40: 0001 ffc00096a000 0001 ffc1fff9a048 fe60: ffc1f6fbef08 ffc1fff9a188 0594 ffc1f6d2fec0 fe80: 0740 ffc1f6276370 0018 0003e800 fea0: 000a9e23fc00 ffc0001a34d4 007f8a8d2820 fec0: 007f89432760 ffc000966000 ffc000966a68 ffc000946ac0 fee0: ffc1f6d2ff70 ffc00094a1e8 ffc000677978 ffc000966000 ff00: ffc1f6d2c000 ffc1f6d2ff50 [] el1_irq+0x68/0xd8 [] default_idle_call+0x1c/0x30 [] cpu_startup_entry+0x1c8/0x218 [] secondary_start_kernel+0x11c/0x140 [<0041000827ec>] 0x41000827ec [ cut here ] kernel BUG at /home/julien/works/linux/drivers/scsi/scsi_lib.c:1096! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP Modules linked in: CPU: 6 PID: 0 Comm: swapper/6 Tainted: GW 4.4.0-rc3 #276 Hardware name: APM X-Gene Mustang board (DT) task: ffc1f6d13700 ti: ffc1f6d2c000 task.ti: ffc1f6d2c000 PC is at scsi_init_sgtable+0xc0/0xd8 LR is at scsi_init_sgtable+0x70/0xd8 pc : [] lr : [] pstate: 21c5 sp : ffc1f6d2f950 x29: ffc1f6d2f950 x28: ffc000848aa8 x27: ffc000808270 x26: ffc1f5cd8000 x25: ffc1f6e68830 x24: 00034000 x23: ffc1f6e68800 x22: x21: x20: ffc0fa11e000 x19: ffc0fa25b2c0 x18: 0007 x17: 000e x16: 0001 x15: 0019 x14: 0033 x13: 004c x12: 0068 x11: ffc1f6d2fbd0 x10: ffc1f62e x9 : x8 : ffc1f6166740 x7 : x6 : x5 : 1000 x4 : 1000 x3 : 1000 x2 : 0042f2e4c000 x1 : 000a x0 : 000b Process swapper/6 (pid: 0, stack limit = 0xffc1f6d2c020) Stack: (0xffc1f6d2f950 to 0xffc1f6d3) f940: ffc1f6d2f980 ffc000473bd4 f960: ffc0fa11e000 ffc0fa11e000 ffc0fa25b200 ffc000483838 f980: ffc1f6d2f9c0 ffc00047c858 ffc0fa11e000 ffc1f6e68800 f9a0: ffc1f62e 0acdc310 ffc1f5cd9400 ffc0faa64800 f9c0: ffc1f6d2fa30 ffc000473d6c ffc0fa25b200 ffc1f6e68968 f9e0: ffc1f62e ffc1f6e68800 ffc1f62e ffc1f6ff6d70 fa00: ffc1f6e68830 ffc1f6e68800 ffc1f6d2fa20 ffc00046d408 fa20: ffc1f6d2fa60 ffc000473ee8 ffc1f6d2fa60 ffc000473e78 fa40: ffc0fa11e000 ffc1f6e68800 ffc1f62e ffc1f6ff6d70 fa60: ffc1f6d2fa90 ffc00035739c ffc1f62e ffc0fa11e000 fa80: ffc0fa8d9100 0080 ffc1f6d2fac0 ffc000474850 faa0: ffc1f6e68800 ffc0faa64800 ffc0fab6ed80 ffc1f6e68850 fac0: ffc1f6d2fb30 ffc000353978 ffc1f62e
Re: [Xen-devel] ARM64 DOM0 crashing after commit 578270b "block: fix segment split"
Hi Jens, On 30/11/2015 20:03, Jens Axboe wrote: The bisector fingered the commit 578270b "block: fix segment split". If I reverted this patch on top of 4.4-rc3 and everything seems to work fine. Anyone have any ideas? Can you try my for-linus branch? I pulled this branch into Linus' master and the problem disappear, thank you! Next time I will try your branch before sending an error report. Regards, -- Julien Grall ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] ARM64 DOM0 crashing after commit 578270b "block: fix segment split"
On 11/30/2015 01:49 PM, Julien Grall wrote: Hi Jens, On 30/11/2015 20:03, Jens Axboe wrote: The bisector fingered the commit 578270b "block: fix segment split". If I reverted this patch on top of 4.4-rc3 and everything seems to work fine. Anyone have any ideas? Can you try my for-linus branch? I pulled this branch into Linus' master and the problem disappear, thank you! Next time I will try your branch before sending an error report. Hopefully we won't have a next time :-). Thanks for reporting, and I'm happy we've got it nailed already. -- Jens Axboe ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
