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b=U8Hr5TCN9auVfN5baqm6iLIPwanGcfC/vIFhnarvyr7jV0WrmuKgAe4HzWz3LFksT II9+YfS5+7DzSI4ovfV2Xv+wY8DojMEkpZDLH5ypYoICdpQ17A/EwbX8DO0nmN4RtL TzgOAtljeMn8m1uBWYHz1Oqmx03Yi51/SyqKmtxYdf+e+msZdOKbpDU6D5kKXMPRMt ENgDas9ZlOnILSG0A7elPUF785zFDwF4AagCmfulT96S5jZAg6zS8tZDgpCEDfGq5z fQzEMWD3+1TzZU/7bKoUi2BToz/tW3OxnK7rY63tlzX9EPR7mJjLF53CuVPNOxsPv1 dm54uC+uyIoCA== Message-ID: Date: Tue, 29 Sep 2026 08:16:52 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] vmcoreinfo: export SECTION_HAS_MEM_MAP To: =?UTF-8?B?SEFHSU8gS0FaVUhJVE8o6JCp5bC+IOS4gOS7gSk=?= , Dave Young , Andrew Morton , Baoquan He , David Carlier , Tao Liu Cc: "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "kexec@lists.infradead.org" References: <20260928-section_has_mem_map-v1-1-4129f6ba2838@kernel.org> <9c47dad9-2716-4ae0-b6e2-9e6b5c718859@linux.dev> <4a57b255-cb38-4e8e-908b-d32e55a1a326@kernel.org> <9d1f8623-c14f-4e51-8aee-6971a4cfbd31@nec.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: C717E100003 X-Stat-Signature: q31131z7hkkaipipk3g7wsdjr97g9t75 X-HE-Tag: 1790662617-43983 X-HE-Meta: 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 Q0bZYLyl QQAGynKcphLFmbOlf5Gghn8Mxlt7F9eiCTofI9qZ/gFSAs8pndE7TmN8ZmtFVymWtV6pbACPwDIOBRVbmlv07ESsCsj9SEvHH37RFtoNCAmfrfpHO4pZB7jxV4269NxhC9CHOPQnDlh3O4cAbm7jm1zXnQ//TJwnjHr/18auFau7cSYVabcKWw1MnCnqSpBxyt8kMk3WzlXyvKQtcDvf6iQUnnZu/GOb14EaJ7+n3Nagxmb13z5RGm+yjaSkzuc2mnJ/LWi+IxNhlGl6oTS955UcJNBTnybngQQxwF3cXTDqhQaBrM+iuHnEoLRmCk3dxS1DAdET/t26sfpTk8/c/8Cne+tLMpFfc5St8hDTavN5HgzzSc9IbjOc+8Q== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/29/26 04:02, HAGIO KAZUHITO(萩尾 一仁) wrote: > > > On 2026/09/29 9:25, Dave Young wrote: >> On 9/28/26 7:42 PM, David Hildenbrand (Arm) wrote: >>> >>> You know the crash code best, so likely ... it's time one of the crash people >>> takes over this patch? >> >> Rethinking about it I'm hesitating to add many more to vmcoreinfo although it is reasonable, about the #ifdef things, there are other places other than mm, crash can not depend on the /proc/config.gz which is not reliable in the old kernel memory, maybe it will be helpful to export another elf note for old kernel's kconfig. So I'd like to support to use your patch for the time being as the first bit is always needed and leave the remaining concerns a follow up item. > > I agree, from makedumpfile's view point. > > (to be exact, makedumpfile needs this but maybe crash can read enum values from vmlinux.) That's a good point, maybe that indeed works for crash. -- Cheers, David