linux-kernel - Re: [PATCH] sparc64: fix hugetlb for sun4u

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Message-ID: <57136aa08c928601d17cf9d37e1da55f4d0410df.camel@physik.fu-berlin.de>
Date: Thu, 24 Jul 2025 12:52:55 +0200
From: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To: Anthony Yznaga <anthony.yznaga@...cle.com>, sparclinux@...r.kernel.org, 
	davem@...emloft.net, andreas@...sler.com
Cc: linux-kernel@...r.kernel.org, agordeev@...ux.ibm.com, will@...nel.org, 
	ryan.roberts@....com, david@...hat.com, osalvador@...e.de
Subject: Re: [PATCH] sparc64: fix hugetlb for sun4u

Hi Anthony,

On Wed, 2025-07-16 at 10:41 +0200, John Paul Adrian Glaubitz wrote:
> > It has actually been observed for a long time that newer kernels are
> > unstable on sun4u while there are no stability issues on sun4v.
> 
> Just as a heads-up: I'm currently building a Debian kernel with this patch
> and see if this fixes the stability issues we're seeing on UltraSPARC machines.

I'm still testing here. There are some still some issues with newer kernels on
sun4u with the code crashing in ext4, but I'm going to perform stresstests with
a patch 4.19.325 kernel now.

I will also try to bisect the other crash regression in sun4u that was introduced
sometime between 4.19.x and 6.x.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
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