From: Borislav Petkov <bp@alien8.de>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Shuai Xue <xueshuai@linux.alibaba.com>,
"nao.horiguchi@gmail.com" <nao.horiguchi@gmail.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"mingo@redhat.com" <mingo@redhat.com>,
"dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
"x86@kernel.org" <x86@kernel.org>,
"hpa@zytor.com" <hpa@zytor.com>,
"linmiaohe@huawei.com" <linmiaohe@huawei.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"peterz@infradead.org" <peterz@infradead.org>,
"jpoimboe@kernel.org" <jpoimboe@kernel.org>,
"linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"baolin.wang@linux.alibaba.com" <baolin.wang@linux.alibaba.com>,
"tianruidong@linux.alibaba.com" <tianruidong@linux.alibaba.com>
Subject: Re: [PATCH v2 0/5] mm/hwpoison: Fix regressions in memory failure handling
Date: Wed, 19 Feb 2025 09:10:37 +0100 [thread overview]
Message-ID: <20250219081037.GAZ7WR_YmRtRvN_LKA@fat_crate.local> (raw)
In-Reply-To: <SJ1PR11MB60836781C4CE26C4B43AFF0BFCFA2@SJ1PR11MB6083.namprd11.prod.outlook.com>
On Tue, Feb 18, 2025 at 05:30:19PM +0000, Luck, Tony wrote:
First of all, thanks for explaining - that helps a lot!
> That's how we ended up with *UN*corrected errors tied to *C*MCI.
>
> Just to add to the confusion, Linux does take an action (in uc_decode_notifier())
> to try to offline the page despite the UC*NA* signature name.
So, AFAIU, hw folks are basically trying to tell us: well, this is
*technically* an uncorrectable error but meh, not really important. We just
met it while fetching some data while scrubbing so who knows whether you'll
consume it or not. Meh...
So why don't we simply do that?
We report the signature but we do not try to offline anything. When we get to
*actually* consume it non-speculatively, *then* we run memory failure and then
we offline the page.
Hmmm?
Would that solve that particular debacle?
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2025-02-19 8:11 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-17 6:33 Shuai Xue
2025-02-17 6:33 ` [PATCH v2 1/5] x86/mce: Collect error message for severities below MCE_PANIC_SEVERITY Shuai Xue
2025-02-18 7:58 ` Borislav Petkov
2025-02-18 9:39 ` Shuai Xue
2025-02-18 9:50 ` Borislav Petkov
2025-02-17 6:33 ` [PATCH v2 2/5] x86/mce: dump error msg from severities Shuai Xue
2025-02-28 12:37 ` Borislav Petkov
2025-03-01 6:16 ` Shuai Xue
2025-03-01 11:10 ` Borislav Petkov
2025-03-01 14:03 ` Shuai Xue
2025-03-01 18:47 ` Borislav Petkov
2025-03-02 7:14 ` Shuai Xue
2025-03-02 7:37 ` Borislav Petkov
2025-03-02 9:13 ` Shuai Xue
2025-03-03 16:49 ` Luck, Tony
2025-03-03 18:08 ` Yazen Ghannam
2025-03-05 1:50 ` Shuai Xue
2025-03-05 16:16 ` Luck, Tony
2025-03-05 22:33 ` Luck, Tony
2025-03-06 15:58 ` Yazen Ghannam
2025-02-17 6:33 ` [PATCH v2 3/5] x86/mce: add EX_TYPE_EFAULT_REG as in-kernel recovery context to fix copy-from-user operations regression Shuai Xue
2025-02-18 12:54 ` Peter Zijlstra
2025-02-18 13:02 ` Peter Zijlstra
2025-02-18 14:03 ` Shuai Xue
2025-02-18 13:28 ` Shuai Xue
2025-02-18 14:15 ` Peter Zijlstra
2025-02-18 16:48 ` Borislav Petkov
2025-02-19 10:40 ` Peter Zijlstra
2025-02-21 6:52 ` Shuai Xue
2025-02-17 6:33 ` [PATCH v2 4/5] mm/hwpoison: Fix incorrect "not recovered" report for recovered clean pages Shuai Xue
2025-02-19 6:34 ` Miaohe Lin
2025-02-19 8:54 ` Shuai Xue
2025-02-19 17:15 ` Luck, Tony
2025-02-20 1:16 ` Miaohe Lin
2025-02-17 6:33 ` [PATCH v2 5/5] mm: memory-failure: move return value documentation to function declaration Shuai Xue
2025-02-19 6:31 ` Miaohe Lin
2025-02-18 3:29 ` [PATCH v2 0/5] mm/hwpoison: Fix regressions in memory failure handling Andrew Morton
2025-02-18 8:03 ` Borislav Petkov
2025-02-18 8:27 ` Borislav Petkov
2025-02-18 11:31 ` Shuai Xue
2025-02-18 12:24 ` Borislav Petkov
2025-02-18 13:08 ` Shuai Xue
2025-02-18 13:17 ` Borislav Petkov
2025-02-18 13:53 ` Shuai Xue
2025-02-18 15:31 ` Borislav Petkov
2025-02-19 7:13 ` Shuai Xue
2025-02-18 17:59 ` Luck, Tony
2025-02-19 6:04 ` Shuai Xue
2025-02-18 17:30 ` Luck, Tony
2025-02-19 8:10 ` Borislav Petkov [this message]
2025-02-19 17:11 ` Luck, Tony
2025-02-20 11:19 ` Borislav Petkov
2025-02-20 17:50 ` Luck, Tony
2025-02-21 6:05 ` Shuai Xue
2025-02-24 22:01 ` Borislav Petkov
2025-02-25 1:51 ` Shuai Xue
2025-02-28 12:35 ` Borislav Petkov
2025-03-01 5:54 ` Shuai Xue
2025-02-24 21:50 ` Borislav Petkov
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