linux-kernel - RE: [PATCH v4 0/3] mm/hwpoison: Fix regressions in memory failure handling

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Message-ID: <SJ1PR11MB6083F2BA604819CD44AB5F26FCD52@SJ1PR11MB6083.namprd11.prod.outlook.com>
Date: Fri, 7 Mar 2025 17:20:09 +0000
From: "Luck, Tony" <tony.luck@...el.com>
To: Shuai Xue <xueshuai@...ux.alibaba.com>, "bp@...en8.de" <bp@...en8.de>,
	"peterz@...radead.org" <peterz@...radead.org>, "catalin.marinas@....com"
	<catalin.marinas@....com>, "yazen.ghannam@....com" <yazen.ghannam@....com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"linmiaohe@...wei.com" <linmiaohe@...wei.com>, "nao.horiguchi@...il.com"
	<nao.horiguchi@...il.com>
CC: "tglx@...utronix.de" <tglx@...utronix.de>, "mingo@...hat.com"
	<mingo@...hat.com>, "dave.hansen@...ux.intel.com"
	<dave.hansen@...ux.intel.com>, "x86@...nel.org" <x86@...nel.org>,
	"hpa@...or.com" <hpa@...or.com>, "jpoimboe@...nel.org" <jpoimboe@...nel.org>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>, "baolin.wang@...ux.alibaba.com"
	<baolin.wang@...ux.alibaba.com>, "tianruidong@...ux.alibaba.com"
	<tianruidong@...ux.alibaba.com>
Subject: RE: [PATCH v4 0/3] mm/hwpoison: Fix regressions in memory failure
 handling

> ## 1. What am I trying to do:
>
> This patch resolves two critical regressions related to memory failure
> handling that have appeared in the upstream kernel since version 5.17, as
> compared to 5.10 LTS.
>
>     - copyin case: poison found in user page while kernel copying from user space
>     - instr case: poison found while instruction fetching in user space

Tested the instruction, copyin, and futex cases. They all pass now.

Thanks!

Tested-by: Tony Luck <tony.luck@...el.com>

-Tony