Hi, your commit 'sched/cpuacct: Split usage accounting into user_usage and sys_usage' in -next causes crashes with several of my qemu tests (mac99, q3beige). Reverting the patch fixes the problem. Details and complete logs are available at http://kerneltests.org/builders/qemu-ppc-next The scripts are published at https://github.com/groeck/linux-build-test/tree/master/rootfs/ppc Crash log and bisect log are attached. Guenter --- Crash log: [ ... ] ftrace: allocating 20986 entries in 62 pages Unable to handle kernel paging request for data at address 0x00000084 Faulting instruction address: 0xc0067188 Oops: Kernel access of bad area, sig: 11 [#1] PREEMPT PowerMac Modules linked in: CPU: 0 PID: 2 Comm: kthreadd Not tainted 4.6.0-rc2-next-20160408-yocto-standard #1 task: c78d0e00 ti: c78e8000 task.ti: c78e8000 NIP: c0067188 LR: c005c0d0 CTR: c005cf84 REGS: c78e9da0 TRAP: 0300 Not tainted (4.6.0-rc2-next-20160408-yocto-standard) MSR: 00001032 <ME,IR,DR,RI> CR: 82040002 XER: 00000000 DAR: 00000084 DSISR: 40000000 GPR00: c005c0d0 c78e9e50 c78d0e00 c78d0e00 00000000 00000000 000a25f0 0037ecae GPR08: ffffffff 00000000 00000000 0027ecae 22000008 00000000 c004decc 00000000 GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 GPR24: 00000001 c78d0e00 c0918580 c78d0e30 00000000 c78d0e00 00000000 000a25f0 NIP [c0067188] cpuacct_charge+0x2c/0x90 LR [c005c0d0] update_curr+0x110/0x250 Call Trace: [c78e9e70] [c005c0d0] update_curr+0x110/0x250 [c78e9ea0] [c005d048] dequeue_task_fair+0xc4/0x27c [c78e9ed0] [c06c67d4] __schedule+0x338/0x770 [c78e9f00] [c06c6c54] schedule+0x48/0xb8 [c78e9f10] [c004e070] kthreadd+0x1a4/0x1dc [c78e9f40] [c0010540] ret_from_kernel_thread+0x5c/0x64 Instruction dump: 4bffffd0 7c0802a6 90010004 60000000 9421ffe0 7c0802a6 bf810010 90010024 81230cb4 7c7d1b78 7cdf3378 7cbe2b78 <83890084> 4800fbfd 813d047c 6b9c4000 ---[ end trace dc8fa200cb88537f ]--- --- bisect: # bad: [6e5921edae25005c5c25a79bb2ff5335650c1b66] Add linux-next specific files # for 20160408 # good: [9735a22799b9214d17d3c231fe377fc852f042e9] Linux 4.6-rc2 git bisect start 'HEAD' 'v4.6-rc2' # good: [e61201ac50d9599aef64e8885d6bfa5b35d574d7] Merge remote-tracking branch # 'mac80211-next/master' git bisect good e61201ac50d9599aef64e8885d6bfa5b35d574d7 # bad: [5c4015574ec4d63b7d3a9efbd8b77f90bcac88be] Merge remote-tracking branch # 'usb-chipidea-next/ci-for-usb-next' git bisect bad 5c4015574ec4d63b7d3a9efbd8b77f90bcac88be # good: [35fda07ad91c8d46253f6dd262800a747adcede9] Merge remote-tracking branch # 'sound-asoc/for-next' git bisect good 35fda07ad91c8d46253f6dd262800a747adcede9 # good: [a2089aa1dcd0a33b8eb67d8db0e07f859b986e04] Merge remote-tracking branch # 'spi/for-next' git bisect good a2089aa1dcd0a33b8eb67d8db0e07f859b986e04 # bad: [129f0d75057f9e78ad70e3e01f6c9edbc7de553c] Merge remote-tracking branch # 'irqchip/irqchip/for-next' git bisect bad 129f0d75057f9e78ad70e3e01f6c9edbc7de553c # bad: [9338637e6e2256ac26ac75391dc1349fb492d7c6] Merge branch 'x86/asm' git bisect bad 9338637e6e2256ac26ac75391dc1349fb492d7c6 # good: [66d219014a4ee47ad4ca2b9db5fe6547353e2a56] perf/x86/intel/pt: Move # transaction start/stop to PMU start/stop callbacks git bisect good 66d219014a4ee47ad4ca2b9db5fe6547353e2a56 # good: [5367d2a3279cd7aa40535efa526fe936ec24528d] Merge branch 'mm/urgent' git bisect good 5367d2a3279cd7aa40535efa526fe936ec24528d # bad: [2b8c41daba327c633228169e8bd8ec067ab443f8] sched/fair: Initiate a new # task's util avg to a bounded value git bisect bad 2b8c41daba327c633228169e8bd8ec067ab443f8 # bad: [d02c071183e1c01a76811c878c8a52322201f81f] sched/fair: Reset # nr_balance_failed after active balancing git bisect bad d02c071183e1c01a76811c878c8a52322201f81f # bad: [d740037fac7052e49450f6fa1454f1144a103b55] sched/cpuacct: Split usage # accounting into user_usage and sys_usage git bisect bad d740037fac7052e49450f6fa1454f1144a103b55 # good: [5ca3726af7f66a8cc71ce4414cfeb86deb784491] sched/cpuacct: Show all # possible CPUs in cpuacct output git bisect good 5ca3726af7f66a8cc71ce4414cfeb86deb784491 # first bad commit: [d740037fac7052e49450f6fa1454f1144a103b55] sched/cpuacct: # Split usage accounting into user_usage and sys_usage -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
