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[149.14.88.26]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-af8f1b172f2sm210258566b.80.2025.07.30.06.52.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 30 Jul 2025 06:52:46 -0700 (PDT) Message-ID: Date: Wed, 30 Jul 2025 15:52:45 +0200 Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC][PATCH v2 22/29] mm/numa: Register information into Kmemdump To: Eugen Hristev , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, tglx@linutronix.de, andersson@kernel.org, pmladek@suse.com Cc: linux-arm-kernel@lists.infradead.org, linux-hardening@vger.kernel.org, corbet@lwn.net, mojha@qti.qualcomm.com, rostedt@goodmis.org, jonechou@google.com, tudor.ambarus@linaro.org References: <20250724135512.518487-1-eugen.hristev@linaro.org> <20250724135512.518487-23-eugen.hristev@linaro.org> From: David Hildenbrand Content-Language: en-US Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 24.07.25 15:55, Eugen Hristev wrote: > Annotate vital static information into kmemdump: > - node_data > > Information on these variables is stored into dedicated kmemdump section. > > Register dynamic information into kmemdump: > - dynamic node data for each node > > This information is being allocated for each node, as physical address, > so call kmemdump_phys_alloc_size that will allocate an unique kmemdump > uid, and register the virtual address. > > Signed-off-by: Eugen Hristev > --- > mm/numa.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/mm/numa.c b/mm/numa.c > index 7d5e06fe5bd4..88cada571171 100644 > --- a/mm/numa.c > +++ b/mm/numa.c > @@ -4,9 +4,11 @@ > #include > #include > #include > +#include > > struct pglist_data *node_data[MAX_NUMNODES]; > EXPORT_SYMBOL(node_data); > +KMEMDUMP_VAR_CORE(node_data, MAX_NUMNODES * sizeof(struct pglist_data)); > > /* Allocate NODE_DATA for a node on the local memory */ > void __init alloc_node_data(int nid) > @@ -16,7 +18,8 @@ void __init alloc_node_data(int nid) > int tnid; > > /* Allocate node data. Try node-local memory and then any node. */ > - nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid); > + nd_pa = kmemdump_phys_alloc_size(nd_size, memblock_phys_alloc_try_nid, > + nd_size, SMP_CACHE_BYTES, nid); Do we really want to wrap memblock allocations in such a way? :/ Gah, no, no no. Can't we pass that as some magical flag, or just ... register *after* allocating? -- Cheers, David / dhildenb