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Perez de Azpillaga" , Mukesh Pilaniya Subject: Re: [PATCH v3 0/5] kho: fix bootmem sizing Message-ID: References: <20261112-kho-bootmem-sizing-v3-0-f0c8d00295d5@kernel.org> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261112-kho-bootmem-sizing-v3-0-f0c8d00295d5@kernel.org> X-Rspamd-Queue-Id: BD8761A000B X-Rspamd-Server: rspam12 X-Stat-Signature: tgmehqiok7cfmzmfah8md8e91mnrq3qr X-Rspam-User: X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS autolearn=unavailable autolearn_force=no version=4.0.1 X-HE-Tag: 1794770524-332223 X-HE-Meta: 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 5R0Qru05 fibXi/PD9/Ea/EYuLR1Y9Db2Cno2gJkU0OxzM5GzY482ajepV3NlsOPMqiNYINN/xlkfFK/ocq1+1EhhPI41uWBaTBkj6nTW5cLktPjaRq6v3C6UKzFBlmRTTwxd9QTeW7S2uwFOOQ9dEOsn3fXqh4ZsFLav1JqB9gIGR6IBw8Xdj3FC1XEL7g/NYvQWx+k7zcw0/gipGd2V9iFS6TEh/UINoro/OJdoR+CkQPRDHHeDnukfrLRV5SnFifSIR2PB+dhGN/FfruDlxzLLDl6GG3f0sHs/i+8TXzTBHTIJ91chNuzE+T8EwTtyYg24qs93zE7V2VxM0/rAs88pdKShxIjJLdDT2vEEdpRHW0rsscyz1IyMbLNxZMy3zoegA4OKxZAM3QtUjxIAM2wlPWc3Aqw7gkA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Thu, Nov 12, 2026 at 12:38:52PM +0200, Mike Rapoport (Microsoft) wrote: > There were several reports about issues with KHO bootmem sizing. > > The bootmem areas are sized from overlapping views of the memory reserved > in memblock, so on NUMA systems memory allocated on a node is accounted > twice and with CONFIG_NUMA=n the lowmem and the global areas are accounted > once again in the area of node 0. Besides, the lowmem and the global areas > are reserved even when they are empty. > > --- > Mike Rapoport (Microsoft) (5): > kho: reject zero bootmem scale > kho: walk bootmem areas in address order > kho: skip zero-sized lowmem and global bootmem areas > kho: fix bootmem sizing > kho: docs: update description of bootmem regions > > Documentation/core-api/kho/index.rst | 31 +++-- > kernel/liveupdate/kexec_handover.c | 225 +++++++++++++++++++++-------------- > 2 files changed, 158 insertions(+), 98 deletions(-) > --- > base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4 > change-id: 20261103-kho-bootmem-sizing-5d6aed47a243 I took this version to the liveupdate tree. -- Sincerely yours, Mike.