Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Mon, 6 May 2019 14:57:45 -0400
From:   Steven Rostedt <rostedt@goodmis.org>
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Andy Lutomirski <luto@amacapital.net>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Andy Lutomirski <luto@kernel.org>,
        Nicolai Stange <nstange@suse.de>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>,
        "the arch/x86 maintainers" <x86@kernel.org>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Jiri Kosina <jikos@kernel.org>,
        Miroslav Benes <mbenes@suse.cz>,
        Petr Mladek <pmladek@suse.com>,
        Joe Lawrence <joe.lawrence@redhat.com>,
        Shuah Khan <shuah@kernel.org>,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        Tim Chen <tim.c.chen@linux.intel.com>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Mimi Zohar <zohar@linux.ibm.com>,
        Juergen Gross <jgross@suse.com>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Nayna Jain <nayna@linux.ibm.com>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Joerg Roedel <jroedel@suse.de>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@vger.kernel.org>, stable <stable@vger.kernel.org>
Subject: Re: [RFC][PATCH 1/2] x86: Allow breakpoints to emulate call
 functions
Message-ID: <20190506145745.17c59596@gandalf.local.home>
In-Reply-To: <CAHk-=whesas+GDtHZks62wqXWXe4d_g3XJ359GX81qj=Fgs6qQ@mail.gmail.com>
References: <20190502181811.GY2623@hirez.programming.kicks-ass.net>
        <CAHk-=wi6A9tgw=kkPh5Ywqt687VvsVEjYXVkAnq0jpt0u0tk6g@mail.gmail.com>
        <20190502202146.GZ2623@hirez.programming.kicks-ass.net>
        <20190502185225.0cdfc8bc@gandalf.local.home>
        <20190502193129.664c5b2e@gandalf.local.home>
        <20190502195052.0af473cf@gandalf.local.home>
        <20190503092959.GB2623@hirez.programming.kicks-ass.net>
        <20190503092247.20cc1ff0@gandalf.local.home>
        <2045370D-38D8-406C-9E94-C1D483E232C9@amacapital.net>
        <CAHk-=wjrOLqBG1qe9C3T=fLN0m=78FgNOGOEL22gU=+Pw6Mu9Q@mail.gmail.com>
        <20190506081951.GJ2606@hirez.programming.kicks-ass.net>
        <20190506095631.6f71ad7c@gandalf.local.home>
        <CAHk-=wgw_Jmn1iJWanoSFb1QZn3mbTD_JEoMsWcWj5QPeyHZHA@mail.gmail.com>
        <20190506130643.62c35eeb@gandalf.local.home>
        <CAHk-=whesas+GDtHZks62wqXWXe4d_g3XJ359GX81qj=Fgs6qQ@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Mon, 6 May 2019 11:06:51 -0700
Linus Torvalds <torvalds@linux-foundation.org> wrote:

> On Mon, May 6, 2019 at 10:06 AM Steven Rostedt <rostedt@goodmis.org> wrote:
> >
> > Can you try booting with:
> > [ snip snip ]
> >
> > And see if it boots?  
> 
> No it doesn't.
> 
> Dang, I tried to figure out what's up, but now I really have to start
> handling all the puill requests..
> 
> I thought it might be an int3 that happens on the entry stack, but I
> don't think that should ever happen. Either it's a user-mode int3, or
> we're in the kernel and have switched stacks. So I still don't see why
> my patch doesn't work, but now I have no time to debug it.
> 

You should have waited another week to open that merge window ;-)

-- Steve