From: "Zhuo, Qiuxu" <qiuxu.zhuo@intel.com>
To: "Luck, Tony" <tony.luck@intel.com>, Jiaqi Yan <jiaqiyan@google.com>
Cc: "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"david@redhat.com" <david@redhat.com>,
"lorenzo.stoakes@oracle.com" <lorenzo.stoakes@oracle.com>,
"linmiaohe@huawei.com" <linmiaohe@huawei.com>,
"ziy@nvidia.com" <ziy@nvidia.com>,
"baolin.wang@linux.alibaba.com" <baolin.wang@linux.alibaba.com>,
"Liam.Howlett@oracle.com" <Liam.Howlett@oracle.com>,
"npache@redhat.com" <npache@redhat.com>,
"ryan.roberts@arm.com" <ryan.roberts@arm.com>,
"dev.jain@arm.com" <dev.jain@arm.com>,
"baohua@kernel.org" <baohua@kernel.org>,
"nao.horiguchi@gmail.com" <nao.horiguchi@gmail.com>,
"Chen, Farrah" <farrah.chen@intel.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Andrew Zaborowski" <andrew.zaborowski@intel.com>
Subject: RE: [PATCH 1/1] mm: prevent poison consumption when splitting THP
Date: Mon, 29 Sep 2025 16:30:16 +0000 [thread overview]
Message-ID: <SA1PR11MB713082CA93E9B1C5F22CFBBE891BA@SA1PR11MB7130.namprd11.prod.outlook.com> (raw)
In-Reply-To: <SJ1PR11MB608350E5169EE77F86A51E2FFC1BA@SJ1PR11MB6083.namprd11.prod.outlook.com>
Hi Tony,
> From: Luck, Tony <tony.luck@intel.com>
> [...]
> Subject: RE: [PATCH 1/1] mm: prevent poison consumption when splitting THP
>
> > Miaohe mentioned in another e-mail that there was an HWPoisoned flag
> for the raw error 4K page.
> > We could use that flag just to skip that raw error page and still use
> > the zeropage for other healthy sub-pages. I'll try that.
>
> That HWPoisoned flag is only set for raw pages where an error has been
> detected. Maybe Linux could implement an
> "is_this_page_all_zero_mc_safe()"[1] that would catch undetected poison
This sounds like a great suggestion to me.
Let's see what others think about this and the name (though the name already LGTM 😊).
> and avoid a crash in that case too?
>
> -Tony
>
> [1] terrible name, pick something better.
next prev parent reply other threads:[~2025-09-29 16:30 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-28 3:28 Qiuxu Zhuo
2025-09-28 21:55 ` Jiaqi Yan
2025-09-29 12:29 ` Miaohe Lin
2025-09-29 13:57 ` Zhuo, Qiuxu
2025-09-29 15:15 ` Jiaqi Yan
2025-09-29 13:27 ` Zhuo, Qiuxu
2025-09-29 15:51 ` Luck, Tony
2025-09-29 16:30 ` Zhuo, Qiuxu [this message]
2025-09-29 17:25 ` David Hildenbrand
2025-09-30 1:48 ` Lance Yang
2025-09-30 8:53 ` David Hildenbrand
2025-09-30 10:13 ` Lance Yang
2025-09-30 10:20 ` Lance Yang
2025-09-29 7:34 ` David Hildenbrand
2025-09-29 13:52 ` Zhuo, Qiuxu
2025-09-29 16:12 ` David Hildenbrand
2025-10-12 1:37 ` Wei Yang
2025-10-12 4:23 ` Jiaqi Yan
2025-10-11 7:55 ` [PATCH v2 " Qiuxu Zhuo
2025-10-11 9:09 ` Lance Yang
2025-10-11 18:18 ` Andrew Morton
2025-10-12 1:23 ` Wei Yang
2025-10-13 17:15 ` Zi Yan
2025-10-14 2:42 ` Miaohe Lin
2025-10-14 14:19 ` [PATCH v3 " Qiuxu Zhuo
2025-10-14 14:29 ` David Hildenbrand
2025-10-14 14:51 ` Zhuo, Qiuxu
2025-10-15 6:49 ` [PATCH v4 " Qiuxu Zhuo
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