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From: Imre Kaloz <kaloz@kernel.org>
To: Stian Halseth <stian@itx.no>
Cc: davem@davemloft.net,
	Andreas Larsson <andreas@gaisler.com>,
	sparclinux@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	glaubitz@physik.fu-berlin.de
Subject: Re: [PATCH 0/3] sparc64: fix a window fill fixup lockup and two fault bugs
Date: Sun, 27 Sep 2026 22:49:37 +0200
Message-ID: <20260927204937.3814-1-kaloz@kernel.org>
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On Fri, 28 Aug 2026 14:37:04 +0200
Stian Halseth <stian@itx.no> wrote:

> A register window fill that faults is mishandled in three ways on
> sparc64.  The first wedges the CPU in kernel mode and takes the
> machine with it; the other two corrupt what the kernel reports
> about the fault, and were found while chasing the first.

Hi Stian,

Confirmed on a Sun Ultra 45. With the series applied it never faulted
through 80 iterations, without them 60 out of 60.

Tested-by: Imre Kaloz <kaloz@kernel.org>


Best,
Imre