Hello I don't have time to come up with a test case right now, but I've applied the patch to fix the oops from two days ago, and re-ran my perf_fuzzer tool and it immediately came up with another issue on ARM. This is an ARM Pandaboard running 3.11-rc4 with the one-line oops fix from the other thread. Vince [ 388.509063] Unable to handle kernel paging request at virtual address 73fd14cc [ 388.509063] pgd = eca6c000 [ 388.519805] [73fd14cc] *pgd=00000000 [ 388.523651] Internal error: Oops: 5 [#1] SMP ARM [ 388.528594] Modules linked in: snd_soc_omap_hdmi omapdss snd_soc_omap_abe_twl6040 snd_soc_twl6040 snd_soc_omap snd_soc_omap_hdmi_card snd_soc_omap_mcpdm snd_soc_omap_mcbsp snd_soc_core snd_compress regmap_spi snd_pcm snd_page_alloc snd_timer snd soundcore [ 388.551757] CPU: 1 PID: 2790 Comm: perf_fuzzer Not tainted 3.11.0-rc4 #6 [ 388.559906] task: eddcab80 ti: ed892000 task.ti: ed892000 [ 388.565643] PC is at armpmu_map_event+0x20/0x88 [ 388.570495] LR is at armpmu_event_init+0x38/0x280 [ 388.574981] pc : [<c001c3e4>] lr : [<c001c17c>] psr: 60000013 [ 388.574981] sp : ed893e40 ip : ecececec fp : edfaec00 [ 388.581878] r10: 00000000 r9 : 00000000 r8 : ed8c3ac0 [ 388.593292] r7 : ed8c3b5c r6 : edfaec00 r5 : 00000000 r4 : 00000000 [ 388.593292] r3 : 000000ff r2 : c0496144 r1 : c049611c r0 : edfaec00 [ 388.607177] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 388.614776] Control: 10c5387d Table: aca6c04a DAC: 00000015 [ 388.614776] Process perf_fuzzer (pid: 2790, stack limit = 0xed892240) [ 388.621826] Stack: (0xed893e40 to 0xed894000) [ 388.632385] 3e40: 00000800 c001c17c 00000002 c008a748 00000001 00000000 00000000 c00bf078 [ 388.634796] 3e60: 00000000 edfaee50 00000000 00000000 00000000 edfaec00 ed8c3ac0 edfaec00 [ 388.634796] 3e80: 00000000 c073ffac ed893f20 c00bf180 00000001 00000000 c00bf078 ed893f20 [ 388.652435] 3ea0: 00000000 ed8c3ac0 00000000 00000000 00000000 c0cb0818 eddcab80 c00bf440 [ 388.667205] 3ec0: ed893f20 00000000 eddcab80 eca76800 00000000 eca76800 00000000 00000000 [ 388.668487] 3ee0: 00000000 ec984c80 eddcab80 c00bfe68 00000000 00000000 00000000 00000080 [ 388.684631] 3f00: 00000000 ed892000 00000000 ed892030 00000004 ecc7e3c8 ecc7e3c8 00000000 [ 388.693328] 3f20: 00000000 00000048 ecececec 00000000 00000000 00000000 00000000 00000000 [ 388.701843] 3f40: 00000000 00000000 00297810 00000000 00000000 00000000 00000000 00000000 [ 388.701843] 3f60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 388.719451] 3f80: 00000002 00000002 000103a4 00000002 0000016c c00128e8 ed892000 00000000 [ 388.724212] 3fa0: 00090998 c0012700 00000002 000103a4 00090ab8 00000000 00000000 0000000f [ 388.731842] 3fc0: 00000002 000103a4 00000002 0000016c 00090ab0 00090ab8 000107a0 00090998 [ 388.745574] 3fe0: bed92be0 bed92bd0 0000b785 b6e8f6d0 40000010 00090ab8 00000000 00000000 [ 388.751831] [<c001c3e4>] (armpmu_map_event+0x20/0x88) from [<c001c17c>] (armpmu_event_init+0x38/0x280) [ 388.764221] [<c001c17c>] (armpmu_event_init+0x38/0x280) from [<c00bf180>] (perf_init_event+0x108/0x180) [ 388.764221] [<c00bf180>] (perf_init_event+0x108/0x180) from [<c00bf440>] (perf_event_alloc+0x248/0x40c) [ 388.764221] [<c00bf440>] (perf_event_alloc+0x248/0x40c) from [<c00bfe68>] (SyS_perf_event_open+0x4f4/0x8fc) [ 388.791839] [<c00bfe68>] (SyS_perf_event_open+0x4f4/0x8fc) from [<c0012700>] (ret_fast_syscall+0x0/0x48) [ 388.804718] Code: 0a000005 e3540004 0a000016 e3540000 (0791010c) [ 388.811248] ---[ end trace 89ea407225495d97 ]--- -- To unsubscribe from this list: send the line "unsubscribe trinity" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
