From: peterz@infradead.org
To: Marco Elver <elver@google.com>
Cc: "Jürgen Groß" <jgross@suse.com>, "Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
fenghua.yu@intel.com, "H. Peter Anvin" <hpa@zytor.com>,
LKML <linux-kernel@vger.kernel.org>,
"Ingo Molnar" <mingo@redhat.com>,
syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Luck, Tony" <tony.luck@intel.com>,
"the arch/x86 maintainers" <x86@kernel.org>,
yu-cheng.yu@intel.com, sdeep@vmware.com,
virtualization@lists.linux-foundation.org,
kasan-dev <kasan-dev@googlegroups.com>,
syzbot <syzbot+8db9e1ecde74e590a657@syzkaller.appspotmail.com>,
"Paul E. McKenney" <paulmck@kernel.org>,
"Wei Liu" <wei.liu@kernel.org>,
"Steven Rostedt" <rostedt@goodmis.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.
next prev parent reply other threads:[~2020-08-12 8:57 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-05 7:19 upstream test error: WARNING in __local_bh_enable_ip syzbot
2020-08-05 13:26 ` [PATCH] x86/paravirt: Add missing noinstr to arch_local*() helpers Marco Elver
2020-08-05 13:42 ` peterz
2020-08-05 13:59 ` Marco Elver
2020-08-05 14:12 ` peterz
2020-08-05 14:17 ` Jürgen Groß
2020-08-05 14:17 ` peterz
2020-08-05 14:36 ` Marco Elver
2020-08-05 17:31 ` Marco Elver
2020-08-06 7:47 ` Marco Elver
2020-08-06 11:32 ` peterz
2020-08-06 13:17 ` Marco Elver
2020-08-06 16:06 ` Marco Elver
2020-08-07 9:01 ` Marco Elver
2020-08-07 9:24 ` Jürgen Groß
2020-08-07 9:50 ` Marco Elver
2020-08-07 10:35 ` Jürgen Groß
2020-08-07 11:38 ` Marco Elver
2020-08-07 12:04 ` Jürgen Groß
2020-08-07 12:08 ` Marco Elver
2020-08-07 15:19 ` Marco Elver
2020-08-11 7:00 ` Marco Elver
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
2020-08-12 8:06 ` Marco Elver
2020-08-12 8:18 ` peterz
2020-08-12 8:57 ` peterz [this message]
2020-08-06 21:02 ` kernel test robot
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