Hello Guenter, I am unable to reproduce the problem. May you give me more details? I rebased my patch onto of 4.10-rc7 and compiled with malta defconfig with disabled SMP. Then booted with qemu. Doesn't seem to have an error with the way I have it set up. I am using the command: qemu-system-mipsel -kernel vmlinux -nographic -smp 0 Thanks, Justin On Wed, Feb 8, 2017 at 3:45 PM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > Hi Justin, > > The 32-bit qemu mips runtime tests for -next at kerneltests.org are crashing > for non-SMP builds as follows. > > cacheinfo: Failed to find cpu0 device node > cacheinfo: Unable to detect cache hierarchy for CPU 0 > CPU 0 Unable to handle kernel paging request at virtual address 00000004, epc == > 8013c6a8, ra == 8013cb54 > Oops[#1]: > CPU: 0 PID: 5 Comm: kworker/u2:0 Not tainted 4.10.0-rc7-next-20170208 #1 > Workqueue: events_unbound call_usermodehelper_exec_work > task: 8704a420 task.stack: 87068000 > $ 0 : 00000000 80770000 873a8204 8700c214 > $ 4 : 00000000 873a8200 00000000 ffff00fe > $ 8 : 8706bfe0 0000a400 fffffffc 8704a459 > $12 : 00000000 00000000 00000000 00000720 > $16 : 873a8200 87045880 00000000 8700c200 > $20 : 87014000 87014005 8700c200 8700c200 > $24 : 00000000 8014d1e8 > $28 : 87068000 8706be70 87045880 8013cb54 > Hi : 00077698 > Lo : ab801af8 > epc : 8013c6a8 process_one_work+0xd4/0x408 > ra : 8013cb54 worker_thread+0x178/0x598 > Status: 1000a402 KERNEL EXL > Cause : 0080000c (ExcCode 03) > BadVA : 00000004 > PrId : 00019300 (MIPS 24Kc) > Modules linked in: > Process kworker/u2:0 (pid: 5, threadinfo=87068000, task=8704a420, tls=00000000) > Stack : 80700000 8700c214 00000088 80700000 8700c200 8700c200 8700c200 87045898 > 80700000 8700c214 00000088 80700000 8700c200 8013cb54 8013c9dc 8704fe00 > 87045600 87045700 80700000 80700000 80700000 80676560 87045600 87045700 > 87045618 87045880 8013c9dc 8704fe00 80670000 80760000 806e0000 80142958 > 00000000 00000000 00000000 00000000 80142850 80142850 87045700 8704b380 > ... > Call Trace: > [<8013c6a8>] process_one_work+0xd4/0x408 > [<8013cb54>] worker_thread+0x178/0x598 > [<80142958>] kthread+0x108/0x138 > [<80105e18>] ret_from_kernel_thread+0x14/0x1c > Code: 8e030008 8e040004 8e150000 <ac830004> 7eb51900 ac640000 ae020004 16400094 ae020008 > > Bisect points to 'MIPS: Add cacheinfo support'; see below for details. > Reverting this patch fixes te problem. > > Configuration is pretty much malta_defconfig with SMP disabled. > I can provide more details if needed. > > Thanks, > Guenter > > --- > # bad: [e3e6c5f3544c5d05c6b3b309a34f4f2c3537e993] Add linux-next specific files for 20170208 > # good: [d5adbfcd5f7bcc6fa58a41c5c5ada0e5c826ce2c] Linux 4.10-rc7 > git bisect start 'HEAD' 'v4.10-rc7' > # bad: [403e468309f9e2b2dbe264be1ad29b1486ed720e] Merge remote-tracking branch 'crypto/master' > git bisect bad 403e468309f9e2b2dbe264be1ad29b1486ed720e > # bad: [44448c3f07a3ae77164de4405fa97baca4f103f5] Merge remote-tracking branch 'hid/for-next' > git bisect bad 44448c3f07a3ae77164de4405fa97baca4f103f5 > # good: [dd4318312c6fc5c00ae7619f875fb73538a2c1e6] Merge remote-tracking branch 'omap/for-next' > git bisect good dd4318312c6fc5c00ae7619f875fb73538a2c1e6 > # bad: [2fe482530119a6d07acca625b29d527dc22435e6] Merge remote-tracking branch 'powerpc/next' > git bisect bad 2fe482530119a6d07acca625b29d527dc22435e6 > # good: [8576190cecf3370ce07ed04178cb3ecbf17dc2d9] Merge remote-tracking branch 'clk/clk-next' > git bisect good 8576190cecf3370ce07ed04178cb3ecbf17dc2d9 > # bad: [bf0505dfeac3f7df81b62d9d81987aaef6739ffd] MIPS: Fix special case in 64 bit IP checksumming. > git bisect bad bf0505dfeac3f7df81b62d9d81987aaef6739ffd > # good: [e89ef66d7682f031f026eee6bba03c8c2248d2a9] MIPS: init: Ensure reserved memory regions are not added to bootmem > git bisect good e89ef66d7682f031f026eee6bba03c8c2248d2a9 > # bad: [a8b3b0c94ac282628f0668d1366239a3fa72dc9d] MIPS: Netlogic: Fix assembler warning from smpboot.S > git bisect bad a8b3b0c94ac282628f0668d1366239a3fa72dc9d > # bad: [07724712bf22aec5fe44e5d399f115755f436721] MIPS: ralink: Add missing symbol for highmem support. > git bisect bad 07724712bf22aec5fe44e5d399f115755f436721 > # good: [856b0f591e951a234d6642cc466023df182eb51c] MIPS: kexec: add debug info about the new kexec'ed image > git bisect good 856b0f591e951a234d6642cc466023df182eb51c > # bad: [2517caf19dbfac3b39f2db5500c5fd03c4370e81] MIPS: ralink: Add missing I2C and I2S clocks. > git bisect bad 2517caf19dbfac3b39f2db5500c5fd03c4370e81 > # bad: [ef462f3b64e9fb0c8e1cd5d60f5bd7f13ac2156d] MIPS: Add cacheinfo support > git bisect bad ef462f3b64e9fb0c8e1cd5d60f5bd7f13ac2156d > # good: [0014dea6b71ae3e0384c3358f632b4728c3d432e] MIPS: generic/kexec: add support for a DTB passed in a separate buffer > git bisect good 0014dea6b71ae3e0384c3358f632b4728c3d432e > # first bad commit: [ef462f3b64e9fb0c8e1cd5d60f5bd7f13ac2156d] MIPS: Add cacheinfo support > >
