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Date: Mon, 17 Nov 2014 23:11:05 -0500 From: Dave Jones <davej@...hat.com> To: Linux Kernel <linux-kernel@...r.kernel.org> Cc: peterz@...radead.org Subject: Re: 3.18-rc2 perf add_event_to_ctx warning On Thu, Oct 30, 2014 at 07:40:29PM -0400, Dave Jones wrote: > WARNING: CPU: 3 PID: 5167 at kernel/events/core.c:1133 add_event_to_ctx+0x1ce/0x1f0() > CPU: 3 PID: 5167 Comm: trinity-c4 Not tainted 3.18.0-rc2+ #79 > 0000000000000009 0000000071bbcfa0 ffff880235ef3c48 ffffffffbd86ef44 > 0000000000000000 0000000000000000 ffff880235ef3c88 ffffffffbd07f1f1 > ffff880235ef3c78 ffff880233e6eee8 ffff880089e4c0f8 0000000001a2978c > Call Trace: > [<ffffffffbd86ef44>] dump_stack+0x4f/0x7c > [<ffffffffbd07f1f1>] warn_slowpath_common+0x81/0xa0 > [<ffffffffbd07f30a>] warn_slowpath_null+0x1a/0x20 > [<ffffffffbd19a68e>] add_event_to_ctx+0x1ce/0x1f0 > [<ffffffffbd1a03a3>] __perf_install_in_context+0xe3/0x1b0 > [<ffffffffbd19a0a3>] remote_function+0x53/0x70 > [<ffffffffbd19a050>] ? schedule_orphans_remove.part.49+0x60/0x60 > [<ffffffffbd1247b6>] generic_exec_single+0x156/0x1d0 > [<ffffffffbd19a050>] ? schedule_orphans_remove.part.49+0x60/0x60 > [<ffffffffbd124896>] smp_call_function_single+0x66/0x110 > [<ffffffffbd0f460e>] ? wait_rcu_gp+0x8e/0xb0 > [<ffffffffbd198f93>] task_function_call+0x53/0x80 > [<ffffffffbd1a02c0>] ? perf_cpu_hrtimer_handler+0x260/0x260 > [<ffffffffbd19a733>] perf_install_in_context+0x83/0xf0 > [<ffffffffbd1a4d80>] SYSC_perf_event_open+0xb70/0xc70 > [<ffffffffbd3ebf27>] ? debug_smp_processor_id+0x17/0x20 > [<ffffffffbd1a52c9>] SyS_perf_event_open+0x9/0x10 > [<ffffffffbd87a009>] tracesys_phase2+0xd4/0xd9 > ---[ end trace 88ffecbb23768dcb ]--- > > > 1133 WARN_ON_ONCE(event->attach_state & PERF_ATTACH_CONTEXT); Still seeing this (unsurprising, as perf hasn't changed any between rc2 & rc5). Any thoughts on this one ? I've not managed to isolate a testcase for it, but I see it every week or so. Dave -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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