linux-kernel - Re: LTS perf unwind fix

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Date:   Thu, 27 May 2021 11:16:54 +0200
From:   "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
To:     "Rantala, Tommi T. (Nokia - FI/Espoo)" <tommi.t.rantala@...ia.com>
Cc:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "jan.kratochvil@...hat.com" <jan.kratochvil@...hat.com>
Subject: Re: LTS perf unwind fix

On Wed, May 26, 2021 at 07:21:15AM +0000, Rantala, Tommi T. (Nokia - FI/Espoo) wrote:
> 2021-05-25 15:06 +0200, gregkh@...uxfoundation.org:
> > On Tue, May 25, 2021 at 12:41:15PM +0000, Rantala, Tommi T. (Nokia -
> > FI/Espoo) wrote:
> > > Can you please cherry-pick this to LTS:
> > > 
> > > commit bf53fc6b5f415cddc7118091cb8fd6a211b2320d
> > > Author: Jan Kratochvil <jan.kratochvil@...hat.com>
> > > Date:   Fri Dec 4 09:17:02 2020 -0300
> > > 
> > >     perf unwind: Fix separate debug info files when using elfutils'
> > > libdw's unwinder
> > 
> > What exact kernel(s) do you want it backported to?
> 
> 5.4.y please, tested Jan's and Dave's patches with it, and they cure
> some broken backtraces.
> 
> 
>   commit 4e1481445407b86a483616c4542ffdc810efb680
>   Author: Dave Rigby <d.rigby@...com>
>   Date:   Thu Feb 18 16:56:54 2021 +0000
> 
>     perf unwind: Set userdata for all __report_module() paths
> 
> 

What does this commit here have to do with the above?

confused as to what exactly you are asking for here, sorry, can you be
more specific?  Like "please apply commits X, Y, and Z, in that order,
to the X.y kernel?"

thanks,

greg k-h