linux-kernel - Re: [PATCH v3 0/2] kho: history: track previous kernel version and kexec boot count

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Message-ID: <irmvsaihncn5pj62iylpqsp4idauakyoiy2xhazh5huomnveb7@qhgrjmbkb55q>
Date: Fri, 9 Jan 2026 03:00:13 -0800
From: Breno Leitao <leitao@...ian.org>
To: SeongJae Park <sj@...nel.org>
Cc: Alexander Graf <graf@...zon.com>, Mike Rapoport <rppt@...nel.org>, 
	Pasha Tatashin <pasha.tatashin@...een.com>, Pratyush Yadav <pratyush@...nel.org>, 
	linux-kernel@...r.kernel.org, kexec@...ts.infradead.org, linux-mm@...ck.org, 
	usamaarif642@...il.com, rmikey@...a.com, clm@...com, riel@...riel.com, 
	kernel-team@...a.com
Subject: Re: [PATCH v3 0/2] kho: history: track previous kernel version and
 kexec boot count

Hello SJ,

On Thu, Jan 08, 2026 at 05:45:58PM -0800, SeongJae Park wrote:
> On Thu, 08 Jan 2026 08:40:57 -0800 Breno Leitao <leitao@...ian.org> wrote:
> 
> > Use Kexec Handover (KHO) to pass the previous kernel's version string
> > and the number of kexec reboots since the last cold boot to the next
> > kernel, and print it at boot time.
> > 
> > Example
> > =======
> > 	[    0.000000] Linux version 6.19.0-rc3-upstream-00047-ge5d992347849
> > 	...
> >         [    0.000000] KHO: exec from: 6.19.0-rc4-next-20260107upstream-00004-g3071b0dc4498 (count 1)
> 
> Nit.  The above snippet uses tabs for first two lines, while the third line
> uses spaces.  I don't really mind this of course, please feel free to ignore.
> I just wanted to prove I did read your cover letter ;)

Thanks for reading it very carefully.

[...]
> Sounds this feature will be useful!  Thank you for detailed cover letter.
> 
> > Signed-off-by: Breno Leitao <leitao@...ian.org>
> 
> The patches also look good to me.  For the series,
> 
> Acked-by: SeongJae Park <sj@...nel.org>
> 
> > ---
> > Changes from v1 to RFC
> 
> Nit.  You mean "from RFC (v1) to v2"?  Again, I don't really mind this trivial
> thing, so please feel free to ignore.

Ack, my fault here. I am using b4, and I need to learn how to deal with 
RFC -> V1 ambiguity better.

If there is a need to update this patchset, I will get them fixed in the
next version.

Thanks for the review,
--breno