On 2017.03.27 16:36 Kirill A. Shutemov wrote: > On Mon, Mar 27, 2017 at 04:16:00PM -0700, Doug Smythies wrote: ... [cut]... >> >> Log segment for one occurrence: >> >> Mar 27 15:17:07 s15 kernel: [92420.587173] BUG: unable to handle kernel paging request at ffff88e680000000 >> Mar 27 15:17:07 s15 kernel: [92420.587203] IP: page_vma_mapped_walk+0xe6/0x5b0 >> Mar 27 15:17:07 s15 kernel: [92420.587217] PGD ac80a067 >> Mar 27 15:17:07 s15 kernel: [92420.587217] PUD 41f5ff067 >> Mar 27 15:17:07 s15 kernel: [92420.587226] PMD 0 > > +Hugh. > > Thanks for report. > > It's likely I've screwed something up with my page_vma_mapped_walk() > transition. I don't see anything yet. And it's 2:30 AM. I'll look more > into it tomorrow. > > Meanwhile, could you check where the page_vma_mapped_walk+0xe6 is in your > build: > > ./scripts/faddr2line <your vmlinux> page_vma_mapped_walk+0xe6 I do not seem to be able to extract what you want: $ ./scripts/faddr2line /boot/vmlinuz-4.11.0-rc2-stock page_vma_mapped_walk+0xe6 readelf: Error: Not an ELF file - it has the wrong magic bytes at the start nm: /boot/vmlinuz-4.11.0-rc2-stock: Warning: Ignoring section flag IMAGE_SCN_MEM_NOT_PAGED in section .bss nm: /boot/vmlinuz-4.11.0-rc2-stock: no symbols nm: /boot/vmlinuz-4.11.0-rc2-stock: Warning: Ignoring section flag IMAGE_SCN_MEM_NOT_PAGED in section .bss nm: /boot/vmlinuz-4.11.0-rc2-stock: no symbols no match for page_vma_mapped_walk+0xe6 Also that is not always the second line of the log files. Here are the other 3: Mar 26 07:08:22 s15 kernel: [134972.690834] BUG: unable to handle kernel paging request at ffffdbbb798c5c20 Mar 26 07:08:22 s15 kernel: [134972.690870] IP: remove_migration_pte+0x98/0x250 Mar 26 07:08:22 s15 kernel: [134972.690884] PGD 41edc8067 Mar 26 07:08:22 s15 kernel: [134972.690884] PUD 0 Mar 16 10:08:45 s15 kernel: [235319.418876] BUG: unable to handle kernel paging request at fffffa0503952ca0 Mar 16 10:08:45 s15 kernel: [235319.418909] IP: remove_migration_pte+0x98/0x250 Mar 16 10:08:45 s15 kernel: [235319.418922] PGD 41edc7067 Mar 16 10:08:45 s15 kernel: [235319.418923] PUD 41edc6067 Mar 16 10:08:45 s15 kernel: [235319.418932] PMD 0 I can not seem to find the log for the 4.11-rc1 failure. I think I might have made a mistake in my initial report, as the first one might have been with kernel 4.10: Feb 28 16:40:11 s15 kernel: [173260.528872] BUG: unable to handle kernel paging request at ffffeadad27224e0 Feb 28 16:40:11 s15 kernel: [173260.529350] IP: remove_migration_pte+0x98/0x250 Feb 28 16:40:11 s15 kernel: [173260.529798] PGD 41edc8067 Feb 28 16:40:11 s15 kernel: [173260.529798] PUD 41edc7067 Feb 28 16:40:11 s15 kernel: [173260.530245] PMD 0 Feb 28 16:40:11 s15 kernel: [173260.530723] Feb 28 16:40:11 s15 kernel: [173260.531615] Oops: 0000 [#1] SMP Feb 28 16:40:11 s15 kernel: [173260.532062] Modules linked in: ... [deleted]... Feb 28 16:40:11 s15 kernel: [173260.536349] CPU: 2 PID: 5386 Comm: qemu-system-x86 Not tainted 4.10.0-stock #214 Doug Smythies -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
