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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Ben Hutchings <ben@decadent.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Steven Rostedt <rostedt@rostedt.homelinux.com>,
	723180@bugs.debian.org, Brian Silverman <bsilver16384@gmail.com>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: Double fault when single-stepping compat task with PREEMPT_RT
Date: Sun, 15 Dec 2013 20:33:45 +0100	[thread overview]
Message-ID: <52AE0419.3050103@linutronix.de> (raw)
In-Reply-To: <1380115449.4430.21.camel@deadeye.wl.decadent.org.uk>

On 09/25/2013 03:24 PM, Ben Hutchings wrote:
> On Tue, 2013-09-24 at 13:43 -0700, Brian Silverman wrote: [...]
>> I got down to a really simple program that reproduces this bug:
>> 
>> 
>> #include <sys/syscall.h> #include <unistd.h> int main() { // I've
>> tried SYS_getpid, SYS_write, and SYS_read here too. 
>> syscall(SYS_gettid); }

Brian, thank you for this excellent stripped down test case.
I think I know what is going on, will dig more later.

> Ben.
> 

Sebastian

  reply	other threads:[~2013-12-15 19:33 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20130917061329.4872.51468.reportbug@dell-inspiron-linux.dlinkrouter>
     [not found] ` <1379427451.23881.48.camel@deadeye.wl.decadent.org.uk>
     [not found]   ` <CAP01z6LVxoA6kDJeL8NuO2aA22BjMvXSk9ZY7z9cOK1=k56vpg@mail.gmail.com>
     [not found]     ` <1379905562.3913.8.camel@deadeye.wl.decadent.org.uk>
     [not found]       ` <CAP01z6+j6moUio9pc3G3iz+ebJCdKEvngddxnxazRP+NXwLkyg@mail.gmail.com>
2013-09-25 13:24         ` Double fault when single-stepping compat task with PREEMPT_RT Ben Hutchings
2013-12-15 19:33           ` Sebastian Andrzej Siewior [this message]
2014-01-03 13:55             ` [PATCH] Revert "x86: Disable IST stacks for debug/int 3/stack fault for PREEMPT_RT" Sebastian Andrzej Siewior
2014-01-04 18:18               ` Andi Kleen
2014-01-05  4:45                 ` Mike Galbraith
2014-01-05  5:05                   ` Mike Galbraith
2014-01-05 18:04                   ` Andi Kleen
2014-01-06 11:32                 ` Sebastian Andrzej Siewior

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