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Date: Mon, 6 May 2019 11:06:51 -0700 From: Linus Torvalds <torvalds@...ux-foundation.org> To: Steven Rostedt <rostedt@...dmis.org> Cc: Peter Zijlstra <peterz@...radead.org>, Andy Lutomirski <luto@...capital.net>, Linux List Kernel Mailing <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, Andy Lutomirski <luto@...nel.org>, Nicolai Stange <nstange@...e.de>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, "H. Peter Anvin" <hpa@...or.com>, "the arch/x86 maintainers" <x86@...nel.org>, Josh Poimboeuf <jpoimboe@...hat.com>, Jiri Kosina <jikos@...nel.org>, Miroslav Benes <mbenes@...e.cz>, Petr Mladek <pmladek@...e.com>, Joe Lawrence <joe.lawrence@...hat.com>, Shuah Khan <shuah@...nel.org>, Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>, Tim Chen <tim.c.chen@...ux.intel.com>, Sebastian Andrzej Siewior <bigeasy@...utronix.de>, Mimi Zohar <zohar@...ux.ibm.com>, Juergen Gross <jgross@...e.com>, Nick Desaulniers <ndesaulniers@...gle.com>, Nayna Jain <nayna@...ux.ibm.com>, Masahiro Yamada <yamada.masahiro@...ionext.com>, Joerg Roedel <jroedel@...e.de>, "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org>, stable <stable@...r.kernel.org> Subject: Re: [RFC][PATCH 1/2] x86: Allow breakpoints to emulate call functions On Mon, May 6, 2019 at 10:06 AM Steven Rostedt <rostedt@...dmis.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. Linus
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