[+cc David, Brian] On Thu, Mar 27, 2014 at 8:01 AM, Fengguang Wu <fengguang...@intel.com> wrote: > FYI, here is a very old warning, too old to be bisected. > > [ 5.282127] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, > supports DPO and FUA > [ 5.286079] SBC-GXx flash: IO:0x258-0x259 MEM:0xdc000-0xdffff > [ 5.288723] ------------[ cut here ]------------ > [ 5.289649] kernel BUG at include/linux/mtd/map.h:148!
I think the problem is that your randconfig happens to have none of CONFIG_MTD_MAP_BANK_WIDTH_* set (you should have played the lottery today!), and the default implementation of map_bankwidth() in that case is just "BUG()": $ grep MTD_MAP config-3.14.0-rc8-wl-03045-gdf16ea4 # CONFIG_MTD_MAP_BANK_WIDTH_1 is not set # CONFIG_MTD_MAP_BANK_WIDTH_2 is not set # CONFIG_MTD_MAP_BANK_WIDTH_4 is not set # CONFIG_MTD_MAP_BANK_WIDTH_8 is not set # CONFIG_MTD_MAP_BANK_WIDTH_16 is not set # CONFIG_MTD_MAP_BANK_WIDTH_32 is not set I don't know enough Kconfig or MTD to fix this. > [ 5.289649] invalid opcode: 0000 [#1] PREEMPT DEBUG_PAGEALLOC > [ 5.289649] CPU: 0 PID: 1 Comm: swapper Not tainted > 3.14.0-rc8-wl-03045-gdf16ea4 #6 > [ 5.289649] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 > [ 5.289649] task: d1c48000 ti: d1c36000 task.ti: d1c36000 > [ 5.289649] EIP: 0060:[<c17982d8>] EFLAGS: 00010296 CPU: 0 > [ 5.289649] EIP is at mtd_do_chip_probe+0x15/0x17 > [ 5.289649] EAX: 00000000 EBX: c242bf28 ECX: 00000000 EDX: d1c37e88 > [ 5.289649] ESI: c2275f71 EDI: d1c37ec4 EBP: d1c37ec8 ESP: d1c37e88 > [ 5.289649] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 > [ 5.289649] CR0: 8005003b CR2: 00000000 CR3: 02556000 CR4: 000006f0 > [ 5.289649] Stack: > [ 5.289649] 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 00000000 > [ 5.289649] 00000000 00000000 00000000 00000000 00000000 00000000 > 00000000 c242c500 > [ 5.289649] d1c37ed0 c1794d3e d1c37ee4 c1794cf5 00000000 c24f0561 > 00000564 d1c37f04 > [ 5.289649] Call Trace: > [ 5.289649] [<c1794d3e>] cfi_probe+0xd/0xf > [ 5.289649] [<c1794cf5>] do_map_probe+0x50/0x66 > [ 5.289649] [<c24f0561>] ? init_ck804xrom+0x37d/0x37d > [ 5.289649] [<c24f0649>] init_sbc_gxx+0xe8/0x123 > [ 5.289649] [<c24b8b54>] do_one_initcall+0x80/0x107 > [ 5.289649] [<c13e5049>] ? strlen+0xf/0x19 > [ 5.289649] [<c24b8500>] ? repair_env_string+0xa/0x51 > [ 5.289649] [<c1049aef>] ? parse_args+0x1bd/0x308 > [ 5.289649] [<c1056a24>] ? __wake_up+0x3a/0x42 > [ 5.289649] [<c24b8cd0>] kernel_init_freeable+0xf5/0x18c > [ 5.289649] [<c24b84f6>] ? do_early_param+0x78/0x78 > [ 5.289649] [<c1e80009>] kernel_init+0xb/0xc2 > [ 5.289649] [<c1051d85>] ? schedule_tail+0x12/0x3a > [ 5.289649] [<c1e93e3b>] ret_from_kernel_thread+0x1b/0x30 > [ 5.289649] [<c1e7fffe>] ? rest_init+0x6e/0x6e > [ 5.289649] Code: e9 1e fd ff ff c7 04 24 44 8e 30 c2 e8 df df 6e 00 e9 28 > fb ff ff 55 31 c0 89 e5 b9 0f 00 00 00 8d 55 c0 57 89 d7 83 ec 3c f3 ab <0f> > 0b 55 ba 90 c1 42 c2 89 e5 e8 dc ff ff ff 5d c3 55 89 e5 57 > [ 5.289649] EIP: [<c17982d8>] mtd_do_chip_probe+0x15/0x17 SS:ESP > 0068:d1c37e88 > [ 5.425765] ---[ end trace ad16f43410cd0373 ]--- > [ 5.428287] swapper (1) used greatest stack depth: 5800 bytes left > > git bisect bad df16ea4de143a63d0f598003bde671cc277390e0 # 16:57 0- > 25 0day head guard for 'devel-hourly-2014032612' > git bisect bad b098d6726bbfb94c06d6e1097466187afddae61f # 16:58 0- > 20 Linux 3.14-rc8 > git bisect bad d8ec26d7f8287f5788a494f56e8814210f0e64be # 16:58 0- > 20 Linux 3.13 > git bisect bad 5e01dc7b26d9f24f39abace5da98ccbd6a5ceb52 # 16:58 0- > 20 Linux 3.12 > git bisect bad 6e4664525b1db28f8c4e1130957f70a94c19213e # 16:58 0- > 20 Linux 3.11 > git bisect bad 8bb495e3f02401ee6f76d1b1d77f3ac9f079e376 # 16:58 0- > 20 Linux 3.10 > git bisect bad c1be5a5b1b355d40e6cf79cc979eb66dafa24ad1 # 16:58 0- > 20 Linux 3.9 > git bisect bad 19f949f52599ba7c3f67a5897ac6be14bfcb1200 # 16:58 0- > 20 Linux 3.8 > git bisect bad 29594404d7fe73cd80eaa4ee8c43dcc53970c60e # 16:59 0- > 20 Linux 3.7 > git bisect bad a0d271cbfed1dd50278c6b06bead3d00ba0a88f9 # 16:59 0- > 20 Linux 3.6 > git bisect bad 28a33cbc24e4256c143dce96c7d93bf423229f92 # 16:59 0- > 20 Linux 3.5 > git bisect bad 76e10d158efb6d4516018846f60c2ab5501900bc # 16:59 0- > 20 Linux 3.4 > git bisect bad c16fa4f2ad19908a47c63d8fa436a1178438c7e7 # 16:59 0- > 40 Linux 3.3 > git bisect bad 805a6af8dba5dfdd35ec35dc52ec0122400b2610 # 16:59 0- > 20 Linux 3.2 > git bisect bad c3b92c8787367a8bb53d57d9789b558f1295cc96 # 16:59 0- > 20 Linux 3.1 > git bisect bad 02f8c6aee8df3cdc935e9bdd4f2d020306035dbe # 16:59 0- > 20 Linux 3.0 > > > This script may reproduce the error. > > ----------------------------------------------------------------------------- > #!/bin/bash > > kernel=$1 > initrd=quantal-core-i386.cgz > > wget --no-clobber > https://github.com/fengguang/reproduce-kernel-bug/blob/master/initrd/$initrd > > kvm=( > qemu-system-x86_64 -cpu kvm64 -enable-kvm > -kernel $kernel > -initrd $initrd > -smp 2 > -m 256M > -net nic,vlan=0,macaddr=00:00:00:00:00:00,model=virtio > -net user,vlan=0 > -net nic,vlan=1,model=e1000 > -net user,vlan=1 > -boot order=nc > -no-reboot > -watchdog i6300esb > -serial stdio > -display none > -monitor null > ) > > append=( > debug > sched_debug > apic=debug > ignore_loglevel > sysrq_always_enabled > panic=10 > prompt_ramdisk=0 > earlyprintk=ttyS0,115200 > console=ttyS0,115200 > console=tty0 > vga=normal > root=/dev/ram0 > rw > ) > > "${kvm[@]}" --append "${append[*]}" > ----------------------------------------------------------------------------- > > Thanks, > Fengguang > > _______________________________________________ > LKP mailing list > l...@linux.intel.com > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/