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From:   Guilherme Piccoli <gpiccoli@canonical.com>
Date:   Mon, 17 Aug 2020 14:13:07 -0300
Message-ID: <CAHD1Q_zsu=M9TZpNFwEni3zW4HQ0eCvmqPBtJt_oJi+3YNOCvQ@mail.gmail.com>
Subject: Re: [PATCH 4.19 35/47] x86/irq: Seperate unused system vectors from
 spurious entry again
To:     Greg KH <gregkh@linuxfoundation.org>
Cc:     Thomas Gleixner <tglx@linutronix.de>, jan.kiszka@siemens.com,
        jbeulich@suse.com, LKML <linux-kernel@vger.kernel.org>,
        marc.zyngier@arm.com, stable@vger.kernel.org,
        "Guilherme G. Piccoli" <kernel@gpiccoli.net>,
        Pedro Principeza <pedro.principeza@canonical.com>
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On Mon, Aug 17, 2020 at 2:05 PM Greg KH <gregkh@linuxfoundation.org> wrote:
>
> On Mon, Aug 17, 2020 at 01:59:00PM -0300, Guilherme G. Piccoli wrote:
> > On 17/08/2020 13:49, Greg KH wrote:
> > > [...]
> > >> I'm sorry, I hoped the subject + thread would suffice heh
> > >
> > > There is no thread here :(
> > >
> >
> > Wow, that's odd. I've sent with In-Reply-To, I'd expect it'd get
> > threaded with the original message. Looking in lore archive [1], it
> > seems my first message wasn't threaded but the others were...apologies
> > for that, not sure what happened...
>
> reply to is fine, but how do you know what my email client has (hint,
> not a copy of 1.5 years of history sitting around in it at the
> moment...)  So there is no "thread" here as far as it is concerned...
>
> Anyway, not a big deal, just properly quote emails in the future, that's
> good to get used to no matter what :)
>
Sure, will do - specially for super old threads like this.


> > >> So, the mainline commit is: f8a8fe61fec8 ("x86/irq: Seperate unused
> > >> system vectors from spurious entry again") [0]. The backport to 4.19
> > >> stable tree has the following id: fc6975ee932b .
> > >
> > > Wow, over 1 1/2 years old, can you remember individual patches that long
> > > ago?
> > >
> > > Anyway, did you try to backport the patch to older kernels to see if it
> > > was possible and could work?
> > >
> > > If so, great, please feel free to submit it to the
> > > stable@vger.kernel.org list and I will be glad to pick it up.
> > >
> >
> > I'm working on it, it is feasible. But I'm seeking here, in this
> > message, what is the reason it wasn't backported for pre-4.19
>
> Try reading the stable mailing list archives, again, you are asking
> about a patch 1.5 years ago.  I can't remember information about patches
> sent _yesterday_ given the quantity we go through...
>
> thanks,
>
> greg k-h

OK, thanks Greg. If Thomas or anybody involved here knows a reason to
not backport it to older kernels, please let me know - I'd really
appreciate that.
Cheers,


Guilherme