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[2003:d8:2f3f:4b00:ee13:8c22:5cc5:d169]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-429c13eaee6sm19776225f8f.33.2025.11.03.04.15.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 03 Nov 2025 04:16:00 -0800 (PST) Message-ID: <341ff738-255f-41c7-8b23-48aac4cf51e3@redhat.com> Date: Mon, 3 Nov 2025 13:15:58 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] mm/memory-failure: remove the selection of RAS To: Xie Yuanbin , tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, akpm@linux-foundation.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, linmiaohe@huawei.com, nao.horiguchi@gmail.com, luto@kernel.org, peterz@infradead.org, tony.luck@intel.com Cc: x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-edac@vger.kernel.org, will@kernel.org, liaohua4@huawei.com, lilinjie8@huawei.com References: <20251103033536.52234-1-xieyuanbin1@huawei.com> <20251103033536.52234-2-xieyuanbin1@huawei.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: 4966D20005 X-Rspamd-Server: rspam03 X-Stat-Signature: iqmbmz8u5xwhnr8uk95rs1bb4tk5nw8o X-HE-Tag: 1762172164-285853 X-HE-Meta: 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 UEDCcBq1 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 03.11.25 04:35, Xie Yuanbin wrote: > The commit 97f0b13452198290799f ("tracing: add trace event for > memory-failure") introduces the selection of RAS in memory-failure. > This commit is just a tracing feature; in reality, there is no dependency > between memory-failure and RAS. RAS increases the size of the bzImage > image by 8k, which is very valuable for embedded devices. > > Signed-off-by: Xie Yuanbin > --- > mm/Kconfig | 1 - > mm/memory-failure.c | 2 ++ > 2 files changed, 2 insertions(+), 1 deletion(-) > > diff --git a/mm/Kconfig b/mm/Kconfig > index a5a90b169435..c3a8e0ba1ac1 100644 > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -738,11 +738,10 @@ config ARCH_SUPPORTS_MEMORY_FAILURE > > config MEMORY_FAILURE > depends on MMU > depends on ARCH_SUPPORTS_MEMORY_FAILURE > bool "Enable recovery from hardware memory errors" > - select RAS > help > Enables code to recover from some memory failures on systems > with MCA recovery. This allows a system to continue running > even when some of its memory has uncorrected errors. This requires > special hardware support and typically ECC memory. > diff --git a/mm/memory-failure.c b/mm/memory-failure.c > index f698df156bf8..baf2bd79b2fb 100644 > --- a/mm/memory-failure.c > +++ b/mm/memory-failure.c > @@ -1276,11 +1276,13 @@ static void update_per_node_mf_stats(unsigned long pfn, > * setting PG_dirty outside page lock. See also comment above set_page_dirty(). > */ > static int action_result(unsigned long pfn, enum mf_action_page_type type, > enum mf_result result) > { > +#ifdef CONFIG_RAS > trace_memory_failure_event(pfn, type, result); > +#endif > > if (type != MF_MSG_ALREADY_POISONED) { > num_poisoned_pages_inc(pfn); > update_per_node_mf_stats(pfn, result); > } I rather wonder whether the memory-tracing code should live in a memory-failure.h instead. -- Cheers David / dhildenb