Vince Weaver <[email protected]> writes: > I thought we had sorted all the AUX issues, though interestingly this is > on a core2 system. > > this is: > > static void __rb_free_aux(struct ring_buffer *rb) > { > > /* > * Should never happen, the last reference should be dropped from > * perf_mmap_close() path, which first stops aux transactions (which > * in turn are the atomic holders of aux_refcount) and then does the > * last rb_free_aux(). > */ > WARN_ON_ONCE(in_atomic()); > > > [87078.464463] WARNING: CPU: 1 PID: 19400 at kernel/events/ring_buffer.c:546 > __rb_free_aux+0x40/0xe8 > [87078.464466] CPU: 1 PID: 19400 Comm: perf_fuzzer Tainted: G W > 4.8.0+ #209 > [87078.464467] Hardware name: AOpen DE7000/nMCP7ALPx-DE R1.06 Oct.19.2012, > BIOS 080015 10/19/2012 > [87078.464468] ffff88011fc85b00c ffffffff812bc679c 0000000000000000c > 0000000000000000c > [87078.464469] ffff88011fc85b40c ffffffff8104e0c8c 000002221fc85b98c > ffff880119bf2700c > [87078.464470] ffff880119bf2700c 0000000000000000c 0000000000000001c > 0000000000006108c > [87078.464470] Call Trace: > [87078.464471] <NMI> [<ffffffff812bc679>] dump_stack+0x4d/0x63 > [87078.464472] [<ffffffff8104e0c8>] __warn+0xca/0xe5 > [87078.464473] [<ffffffff8104e19f>] warn_slowpath_null+0x1d/0x1f > [87078.464473] [<ffffffff810fa055>] __rb_free_aux+0x40/0xe8 > [87078.464474] [<ffffffff810fab48>] rb_free_aux+0x18/0x1a > [87078.464475] [<ffffffff810fad83>] perf_aux_output_end+0xca/0xd9 > [87078.464475] [<ffffffff81009890>] intel_bts_interrupt+0xc4/0x11f > [87078.464476] [<ffffffff8100868c>] intel_pmu_handle_irq+0x75/0x3db
Yeah, this really shouldn't be happening. How reproducible is this? Any clues that may help me reproduce it? Meanwhile I'll stare at the code some more. Regards, -- Alex
