From: peterz@infradead.org
To: Marco Elver <elver@google.com>
Cc: "Jürgen Groß" <jgross@suse.com>,
fenghua.yu@intel.com, yu-cheng.yu@intel.com, "Luck,
Tony" <tony.luck@intel.com>,
"Paul E. McKenney" <paulmck@kernel.org>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
LKML <linux-kernel@vger.kernel.org>,
kasan-dev <kasan-dev@googlegroups.com>,
virtualization@lists.linux-foundation.org,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Steven Rostedt" <rostedt@goodmis.org>,
"H. Peter Anvin" <hpa@zytor.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
syzbot <syzbot+8db9e1ecde74e590a657@syzkaller.appspotmail.com>,
"Wei Liu" <wei.liu@kernel.org>,
"the arch/x86 maintainers" <x86@kernel.org>
Subject: Re: [PATCH] x86/paravirt: Add missing noinstr to arch_local*() helpers
Date: Wed, 12 Aug 2020 10:57:17 +0200 [thread overview]
Message-ID: <20200812085717.GJ35926@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200812081832.GK2674@hirez.programming.kicks-ass.net>
On Wed, Aug 12, 2020 at 10:18:32AM +0200, peterz@infradead.org wrote:
> > trace_hardirqs_restore+0x59/0x80 kernel/trace/trace_preemptirq.c:106
> > rcu_irq_enter_irqson+0x43/0x70 kernel/rcu/tree.c:1074
> > trace_irq_enable_rcuidle+0x87/0x120 include/trace/events/preemptirq.h:40
> > trace_hardirqs_restore+0x59/0x80 kernel/trace/trace_preemptirq.c:106
> > rcu_irq_enter_irqson+0x43/0x70 kernel/rcu/tree.c:1074
> > trace_irq_enable_rcuidle+0x87/0x120 include/trace/events/preemptirq.h:40
> > trace_hardirqs_restore+0x59/0x80 kernel/trace/trace_preemptirq.c:106
> > rcu_irq_enter_irqson+0x43/0x70 kernel/rcu/tree.c:1074
> > trace_irq_enable_rcuidle+0x87/0x120 include/trace/events/preemptirq.h:40
> > trace_hardirqs_restore+0x59/0x80 kernel/trace/trace_preemptirq.c:106
> > rcu_irq_enter_irqson+0x43/0x70 kernel/rcu/tree.c:1074
> >
> > <... repeated many many times ...>
> >
> > trace_irq_enable_rcuidle+0x87/0x120 include/trace/events/preemptirq.h:40
> > trace_hardirqs_restore+0x59/0x80 kernel/trace/trace_preemptirq.c:106
> > rcu_irq_enter_irqson+0x43/0x70 kernel/rcu/tree.c:1074
> > Lost 500 message(s)!
> > BUG: stack guard page was hit at 00000000cab483ba (stack is 00000000b1442365..00000000c26f9ad3)
> > BUG: stack guard page was hit at 00000000318ff8d8 (stack is 00000000fd87d656..0000000058100136)
> > ---[ end trace 4157e0bb4a65941a ]---
>
> Wheee... recursion! Let me try and see if I can make something of that.
All that's needed is enabling the preemptirq tracepoints. Lemme go fix.
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prev parent reply other threads:[~2020-08-12 8:57 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <0000000000007d3b2d05ac1c303e@google.com>
[not found] ` <20200805132629.GA87338@elver.google.com>
2020-08-05 13:42 ` [PATCH] x86/paravirt: Add missing noinstr to arch_local*() helpers peterz
[not found] ` <20200805135940.GA156343@elver.google.com>
2020-08-05 14:12 ` peterz
2020-08-05 14:17 ` Jürgen Groß
2020-08-05 14:17 ` peterz
[not found] ` <CANpmjNN6FWZ+MsAn3Pj+WEez97diHzqF8hjONtHG15C2gSpSgw@mail.gmail.com>
[not found] ` <CANpmjNNy3XKQqgrjGPPKKvXhAoF=mae7dk8hmoS4k4oNnnB=KA@mail.gmail.com>
[not found] ` <20200806074723.GA2364872@elver.google.com>
2020-08-06 11:32 ` peterz
[not found] ` <20200806131702.GA3029162@elver.google.com>
[not found] ` <CANpmjNNqt8YrCad4WqgCoXvH47pRXtSLpnTKhD8W8+UpoYJ+jQ@mail.gmail.com>
[not found] ` <CANpmjNO860SHpNve+vaoAOgarU1SWy8o--tUWCqNhn82OLCiew@mail.gmail.com>
2020-08-07 9:24 ` Jürgen Groß
[not found] ` <20200807095032.GA3528289@elver.google.com>
2020-08-07 10:35 ` Jürgen Groß
[not found] ` <20200807113838.GA3547125@elver.google.com>
2020-08-07 12:04 ` Jürgen Groß
[not found] ` <CANpmjNPau_DEYadey9OL+iFZKEaUTqnFnyFs1dU12o00mg7ofA@mail.gmail.com>
[not found] ` <20200807151903.GA1263469@elver.google.com>
[not found] ` <CANpmjNM1jASqCFYZpteVrZCa2V2D_DbXaqvoCV_Ac2boYfDXnQ@mail.gmail.com>
2020-08-11 7:04 ` Jürgen Groß
2020-08-11 7:41 ` Peter Zijlstra
2020-08-11 7:57 ` Jürgen Groß
2020-08-11 8:12 ` Peter Zijlstra
2020-08-11 8:18 ` Jürgen Groß
2020-08-11 8:38 ` Jürgen Groß
2020-08-11 9:20 ` peterz
2020-08-11 9:46 ` peterz
2020-08-11 20:17 ` peterz
[not found] ` <20200812080650.GA3894595@elver.google.com>
2020-08-12 8:18 ` peterz
2020-08-12 8:57 ` peterz [this message]
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