On 12/01/17 at 02:52pm, Juerg Haefliger wrote: > Loading a kexec kernel using today's linux-tip master with KAISER=y > triggers the following warning: I also noticed this when trigger a crash to jump to kdump kernel, and kdump kernel failed to bootup. I am trying to fix it on tip/WIP.x86/mm. Maybe still need a little time. > > [ 18.054017] ------------[ cut here ]------------ > [ 18.054024] WARNING: CPU: 0 PID: 1183 at > ./arch/x86/include/asm/pgtable_64.h:258 native_set_p4d+0x5f/0x80 > [ 18.054025] Modules linked in: nls_utf8 isofs ppdev nls_iso8859_1 > kvm_intel kvm irqbypass input_leds serio_raw i2c_piix4 parport_pc > parport qemu_fw_cfg mac_hid 9p fscache ib_iser rdma_cm iw_cm ib_cm > ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi > 9pnet_virtio 9pnet ip_tables x_tables autofs4 btrfs zstd_decompress > zstd_compress xxhash raid10 raid456 async_raid6_recov async_memcpy > async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath > linear cirrus ttm drm_kms_helper syscopyarea sysfillrect sysimgblt > fb_sys_fops psmouse virtio_blk virtio_net drm floppy pata_acpi > [ 18.054047] CPU: 0 PID: 1183 Comm: kexec Not tainted 4.14.0-kaiser+ #2 > [ 18.054047] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), > BIOS 1.10.2-1ubuntu1 04/01/2014 > [ 18.054048] task: ffff8a53f9d0ab80 task.stack: ffffaba640890000 > [ 18.054049] RIP: 0010:native_set_p4d+0x5f/0x80 > [ 18.054050] RSP: 0018:ffffaba640893e20 EFLAGS: 00010246 > [ 18.054051] RAX: 0000000038ac9063 RBX: 000000003ffda000 RCX: > 000000003ffda000 > [ 18.054051] RDX: ffff8a53fd1f6ff8 RSI: 0000000038ac9063 RDI: > ffff8a53f71ba000 > [ 18.054051] RBP: 000000003ffda000 R08: 000075abc0000000 R09: > ffff8a53f8ac9000 > [ 18.054052] R10: 0000000000000003 R11: 000000003ffda000 R12: > ffff8a53f71ba000 > [ 18.054052] R13: ffffaba640893e78 R14: 0000000000000000 R15: > ffffff8000000000 > [ 18.054053] FS: 00007f0e95188740(0000) GS:ffff8a53ffc00000(0000) > knlGS:0000000000000000 > [ 18.054054] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 18.054054] CR2: 00007f0e94bf0fa0 CR3: 000000003c452000 CR4: > 00000000000006f0 > [ 18.054056] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [ 18.054056] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > 0000000000000400 > [ 18.054057] Call Trace: > [ 18.054065] kernel_ident_mapping_init+0x147/0x190 > [ 18.054069] machine_kexec_prepare+0xc8/0x490 > [ 18.054071] ? trace_clock_x86_tsc+0x10/0x10 > [ 18.054074] do_kexec_load+0x1d7/0x2d0 > [ 18.054079] SyS_kexec_load+0x84/0xc0 > [ 18.054083] entry_SYSCALL_64_fastpath+0x1e/0x81 > [ 18.054087] RIP: 0033:0x7f0e94c9c9f9 > [ 18.054087] RSP: 002b:00007ffe0d1a83e8 EFLAGS: 00000246 ORIG_RAX: > 00000000000000f6 > [ 18.054088] RAX: ffffffffffffffda RBX: 000055a491d71240 RCX: > 00007f0e94c9c9f9 > [ 18.054089] RDX: 000055a492aaa570 RSI: 0000000000000003 RDI: > 000000003ffd1730 > [ 18.054089] RBP: 00007ffe0d1a8510 R08: 0000000000000008 R09: > 0000000000000001 > [ 18.054089] R10: 00000000003e0000 R11: 0000000000000246 R12: > 0000000000000100 > [ 18.054090] R13: 0000000000000040 R14: 0000000001b1d820 R15: > 000000000007c7e0 > [ 18.054090] Code: 37 c3 f6 07 04 74 1b 48 89 f8 25 ff 0f 00 00 48 3d > ff 07 00 00 77 18 48 89 f8 80 cc 10 48 89 30 eb dc 83 3d 07 6d ff 00 02 > 75 d3 <0f> ff eb cf 0f ff eb cb 48 b8 00 00 00 00 00 00 00 80 48 09 c6 > [ 18.054104] ---[ end trace f206deb161cf8af0 ]--- > > ...Juerg > -- 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>
