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Date:   Mon, 25 Dec 2017 10:47:46 +0100
From:   Ingo Molnar <>
To:     Alexandru Chirvasitu <>
Cc:     Linus Torvalds <>,
        Thomas Gleixner <>,
        kernel list <>,
        Andy Lutomirski <>,
        Borislav Petkov <>,
        Brian Gerst <>,
        Denys Vlasenko <>,
        "H. Peter Anvin" <>,
        Josh Poimboeuf <>,
        Peter Zijlstra <>,
        Steven Rostedt <>
Subject: Re: PROBLEM: consolidated IDT invalidation causes kexec to reboot

* Alexandru Chirvasitu <> wrote:

> The first attachment is the config I initially used last night after
> that second patch (removing 'local' etc.).
> As you guessed, all four options are set, hence the name of the file
> (ending in '-y'). The other config I'm attaching was treated as you
> lay out (2-config-n).
> I used the '-n' config to compile two kernels just now:
> (a) e802a51, that same first commit giving me trouble.
> The changes made no difference to kexec behaviour: with the e802a51
> kernel calling kexec boot directly with -e and triggering a panic both
> kick off a full reboot, though the crash kernel registers as loaded.
> (b) the kernel in the branch I made last night, with the set_idt kexec
> (for good measure, I thought I might as well do this one too).
> No difference here either: the crash dump kernel boots fine both ways
> (directly and upon intentional crashing).

Thanks for all the info!

Detailed analysis from me (or Thomas) will have to wait after the Christmas 



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