Greetings, 0day kernel testing robot got the below dmesg and the first bad commit is git://git.infradead.org/users/hch/scsi.git sg-cleanups commit 197930e0b6542460e8b47b7329e495211b692474 Author: Dan Williams <dan.j.williams(a)intel.com&gt; AuthorDate: Thu Jul 30 12:54:34 2015 -0400 Commit: Christoph Hellwig <hch(a)lst.de&gt; CommitDate: Fri Aug 7 10:06:51 2015 +0200 acpi: switch from ioremap_cache to memremap In preparation for deprecating ioremap_cache() convert its usage in drivers/acpi and include/acpi/ to memremap. This includes dropping the __iomem annotation throughout ACPI since the memremap can be treated as a normal memory pointer. Finally, memremap automatically handles requests to map normal memory pages, so this also drops the calls to "should_use_kmap()". It seems ARM had a local definition of acpi_os_ioremap() to handle RAM addresses, but it can be deleted now that memremap() handles this generically. Cc: Bob Moore <robert.moore(a)intel.com&gt; Cc: Lv Zheng <lv.zheng(a)intel.com&gt; Cc: Russell King <rmk+kernel(a)arm.linux.org.uk&gt; Acked-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com&gt; Signed-off-by: Dan Williams <dan.j.williams(a)intel.com&gt; +------------------------------------------+------------+------------+------------+ | | 383b57148f | 197930e0b6 | c7c5e31573 | +------------------------------------------+------------+------------+------------+ | boot_successes | 63 | 0 | 0 | | boot_failures | 0 | 22 | 17 | | WARNING:at_kernel/memremap.c:#memremap() | 0 | 22 | 17 | | backtrace:acpi_os_get_root_pointer | 0 | 22 | 17 | | backtrace:broadcom_postcore_init | 0 | 22 | 17 | | backtrace:kernel_init_freeable | 0 | 22 | 17 | | kernel_BUG_at_arch/x86/mm/physaddr.c | 0 | 0 | 2 | | invalid_opcode | 0 | 0 | 2 | | EIP_is_at__phys_addr | 0 | 0 | 2 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 0 | 2 | | backtrace:SYSC_mmap_pgoff | 0 | 0 | 2 | | backtrace:SyS_mmap_pgoff | 0 | 0 | 2 | | BUG:kernel_boot_hang | 0 | 0 | 2 | +------------------------------------------+------------+------------+------------+ [ 0.043138] cpuidle: using governor menu [ 0.043363] ------------[ cut here ]------------ [ 0.043363] ------------[ cut here ]------------ [ 0.044136] WARNING: CPU: 0 PID: 1 at kernel/memremap.c:53 memremap+0x89/0x1e0() [ 0.044136] WARNING: CPU: 0 PID: 1 at kernel/memremap.c:53 memremap+0x89/0x1e0() [ 0.045646] memremap attempted on mixed range 0x000000000009f000 size: 4096 [ 0.045646] memremap attempted on mixed range 0x000000000009f000 size: 4096 [ 0.046674] CPU: 0 PID: 1 Comm: swapper Not tainted 4.2.0-rc4-00016-g197930e #6 [ 0.046674] CPU: 0 PID: 1 Comm: swapper Not tainted 4.2.0-rc4-00016-g197930e #6 [ 0.047880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 [ 0.047880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 [ 0.050006] 00000001 [ 0.050006] 00000001 8f5fde90 8f5fde90 8f5fa000 8f5fa000 8f5fde64 8f5fde64 81cbce05 81cbce05 8f5fde80 8f5fde80 81040ac7 81040ac7 00000035 00000035 [ 0.051376] 810d52ff [ 0.051376] 810d52ff 00001000 00001000 00000001 00000001 00000001 00000001 8f5fde98 8f5fde98 81040b27 81040b27 00000009 00000009 8f5fde90 8f5fde90 [ 0.052740] 82397891 [ 0.052740] 82397891 8f5fdeac 8f5fdeac 8f5fdec8 8f5fdec8 810d52ff 810d52ff 823978c2 823978c2 00000035 00000035 82397891 82397891 8f5fdeb4 8f5fdeb4 [ 0.054209] Call Trace: [ 0.054209] Call Trace: [ 0.054623] [<81cbce05>] dump_stack+0x16/0x18 [ 0.054623] [<81cbce05>] dump_stack+0x16/0x18 [ 0.055368] [<81040ac7>] warn_slowpath_common+0xac/0xc3 [ 0.055368] [<81040ac7>] warn_slowpath_common+0xac/0xc3 [ 0.056263] [<810d52ff>] ? memremap+0x89/0x1e0 [ 0.056263] [<810d52ff>] ? memremap+0x89/0x1e0 [ 0.056674] [<81040b27>] warn_slowpath_fmt+0x2b/0x2f [ 0.056674] [<81040b27>] warn_slowpath_fmt+0x2b/0x2f [ 0.057518] [<810d52ff>] memremap+0x89/0x1e0 [ 0.057518] [<810d52ff>] memremap+0x89/0x1e0 [ 0.058245] [<81cb96f6>] acpi_os_map_iomem+0x10c/0x17d [ 0.058245] [<81cb96f6>] acpi_os_map_iomem+0x10c/0x17d [ 0.059109] [<81cb9774>] acpi_os_map_memory+0xd/0xf [ 0.059109] [<81cb9774>] acpi_os_map_memory+0xd/0xf [ 0.060009] [<82b55e53>] acpi_find_root_pointer+0x8b/0x1c8 [ 0.060009] [<82b55e53>] acpi_find_root_pointer+0x8b/0x1c8 [ 0.060924] [<82b53f73>] acpi_os_get_root_pointer+0x46/0x52 [ 0.060924] [<82b53f73>] acpi_os_get_root_pointer+0x46/0x52 [ 0.061856] [<82b89e07>] broadcom_postcore_init+0x8/0x71 [ 0.061856] [<82b89e07>] broadcom_postcore_init+0x8/0x71 [ 0.062747] [<82b22f15>] do_one_initcall+0x130/0x212 [ 0.062747] [<82b22f15>] do_one_initcall+0x130/0x212 [ 0.063340] [<82b89dff>] ? cnb20le_res+0x2ee/0x2ee [ 0.063340] [<82b89dff>] ? cnb20le_res+0x2ee/0x2ee [ 0.064314] [<8105f1b4>] ? parse_args+0x347/0x40e [ 0.064314] [<8105f1b4>] ? parse_args+0x347/0x40e [ 0.065098] [<82b230df>] ? kernel_init_freeable+0xe8/0x1c5 [ 0.065098] [<82b230df>] ? kernel_init_freeable+0xe8/0x1c5 [ 0.066674] [<82b230ff>] kernel_init_freeable+0x108/0x1c5 [ 0.066674] [<82b230ff>] kernel_init_freeable+0x108/0x1c5 [ 0.067587] [<81cb86b3>] kernel_init+0xe/0x139 [ 0.067587] [<81cb86b3>] kernel_init+0xe/0x139 [ 0.068331] [<81ccf9c0>] ret_from_kernel_thread+0x20/0x30 [ 0.068331] [<81ccf9c0>] ret_from_kernel_thread+0x20/0x30 [ 0.069232] [<81cb86a5>] ? rest_init+0xa7/0xa7 [ 0.069232] [<81cb86a5>] ? rest_init+0xa7/0xa7 [ 0.070011] ---[ end trace f92808836c27e864 ]--- [ 0.070011] ---[ end trace f92808836c27e864 ]--- git bisect start c7c5e3157322ce40230054acb3a14a6d3eea3bc5 f7644cbfcdf03528f0f450f3940c4985b2291f49 -- git bisect bad 0b1021e04c1221368a14c07d743559554062b9f4 # 14:46 0- 5 Merge 'char-misc/kdbus' into devel-spot-201508110113 git bisect bad 358ce893f63ae2c61f11ad9c3a413cb8bb607b87 # 14:56 0- 22 Merge 'cgroup/review-cgroup2' into devel-spot-201508110113 git bisect good 00b695205039ec3eefb1a4578a57454b91f3f23a # 15:05 22+ 0 Merge 'pm/bleeding-edge' into devel-spot-201508110113 git bisect bad eb7d7490461242ba46daf96b114ec9f49c5d48b8 # 15:14 0- 22 Merge 'hwmon/watchdog-timer' into devel-spot-201508110113 git bisect bad 0df4d650c74a823f191155edf8c36ff06a111731 # 15:27 0- 21 Merge 'hch-scsi/sg-cleanups' into devel-spot-201508110113 git bisect good 3ae1b627865c10ce44189f2038a6dbf5e9e086b0 # 15:36 22+ 0 Merge 'tip/core/efi' into devel-spot-201508110113 git bisect good ab109016a8226067af4243626e1629aa36c547a5 # 15:46 22+ 0 Merge 'iio/fixes-togreg' into devel-spot-201508110113 git bisect good 362639c3565bcb50ffaa6f0175d794718dbba290 # 16:03 22+ 0 arm: switch from ioremap_cache to memremap git bisect bad 8b8800fa396c0e5539b8bb093eaf14398b79a18c # 16:16 0- 21 memconsole: fix __iomem mishandling, switch to memremap git bisect good 383b57148f4367871b6f58261066c71a71841748 # 16:32 22+ 0 i915: switch from acpi_os_ioremap to memremap git bisect bad 0a0f6dc7ec2b5551f8ceda7d34168cefd7a2e92b # 16:47 0- 22 toshiba laptop: replace ioremap_cache with ioremap git bisect bad 197930e0b6542460e8b47b7329e495211b692474 # 22:12 0- 22 acpi: switch from ioremap_cache to memremap # first bad commit: [197930e0b6542460e8b47b7329e495211b692474] acpi: switch from ioremap_cache to memremap git bisect good 383b57148f4367871b6f58261066c71a71841748 # 22:15 63+ 0 i915: switch from acpi_os_ioremap to memremap # extra tests with DEBUG_INFO git bisect bad 197930e0b6542460e8b47b7329e495211b692474 # 23:23 0- 29 acpi: switch from ioremap_cache to memremap # extra tests on HEAD of linux-devel/devel-spot-201508110113 git bisect bad c7c5e3157322ce40230054acb3a14a6d3eea3bc5 # 23:23 0- 17 0day head guard for 'devel-spot-201508110113' # extra tests on tree/branch hch-scsi/sg-cleanups git bisect bad a76aa388f32e6a42d5fd3382646f7793236f3edc # 23:57 0- 66 scatterlist: use sg_phys() # extra tests with first bad commit reverted # extra tests on tree/branch linus/master git bisect good 58ccab91342c1cc1fe08da9b198ac5d763706c2e # 00:18 66+ 0 Merge tag 'localmodconfig-v4.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-kconfig # extra tests on tree/branch linux-next/master git bisect good c1a0c66f231dcfd156cee1233709e62cb0a13378 # 00:32 66+ 0 Add linux-next specific files for 20150812 This script may reproduce the error. ---------------------------------------------------------------------------- #!/bin/bash kernel=$1 initrd=yocto-minimal-i386.cgz wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd kvm=( qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap -kernel $kernel -initrd $initrd -m 256 -smp 1 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -serial stdio -display none -monitor null ) append=( hung_task_panic=1 earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw drbd.minor_count=8 ) "${kvm[@]}" --append "${append[*]}" ---------------------------------------------------------------------------- --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/lkp Intel Corporation