linux-kernel - Re: [PATCH v12 6/6] arm64: send SIGBUS to user process for SEA exception

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Message-ID: <20240819130809.0000731c@Huawei.com>
Date: Mon, 19 Aug 2024 13:08:09 +0100
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Tong Tiangen <tongtiangen@...wei.com>
CC: Mark Rutland <mark.rutland@....com>, Catalin Marinas
	<catalin.marinas@....com>, Will Deacon <will@...nel.org>, Andrew Morton
	<akpm@...ux-foundation.org>, James Morse <james.morse@....com>, "Robin
 Murphy" <robin.murphy@....com>, Andrey Konovalov <andreyknvl@...il.com>,
	Dmitry Vyukov <dvyukov@...gle.com>, Vincenzo Frascino
	<vincenzo.frascino@....com>, Michael Ellerman <mpe@...erman.id.au>, Nicholas
 Piggin <npiggin@...il.com>, Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Alexander Potapenko <glider@...gle.com>, Christophe Leroy
	<christophe.leroy@...roup.eu>, Aneesh Kumar K.V <aneesh.kumar@...nel.org>,
	"Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>, Thomas Gleixner
	<tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov
	<bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, <x86@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-mm@...ck.org>, <linuxppc-dev@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>, <wangkefeng.wang@...wei.com>, Guohanjun
	<guohanjun@...wei.com>
Subject: Re: [PATCH v12 6/6] arm64: send SIGBUS to user process for SEA
 exception

On Tue, 28 May 2024 16:59:15 +0800
Tong Tiangen <tongtiangen@...wei.com> wrote:

> For SEA exception, kernel require take some action to recover from memory
> error, such as isolate poison page adn kill failure thread, which are done
> in memory_failure().
> 
> During our test, the failure thread cannot be killed due to this issue[1],
> Here, I temporarily workaround this issue by sending signals to user
> processes in do_sea(). After [1] is merged, this patch can be rolled back
> or the SIGBUS will be sent repeated.
> 
> [1]https://lore.kernel.org/lkml/20240204080144.7977-1-xueshuai@linux.alibaba.com/
What's the status of that one?  Seems better to help get that in than
carry this.

Jonathan