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b=BNruJSl8/KBB4up6PyP7UWp7d2fZ5VU2Y7JJ1RtQGHBcbm77xK8Nfa5Lpq0oVgeZY wpAOm0qMeB4ZWzHGR2SFWAEPXE1VE2c3StJdhOyfwfKSs/dSinzWr9/4pyQYgp+8Jp inT9VKwXqiT20OdmMqpanrVonSLTSVvGE9c/QgevrkvFYrruo6hwR3F8j+9vkz3dvm y7M/lBBSlTGAPU7sg78PK8tjzGhik4XUg5NzFqMXb9sRa4eAQMncVyvgbPhUH6sVKn QQfiOzYZBOOG8LEYn0iBVCw7kH3ZFCC12NrIRjeg8RwNp56GSHhX26Xyrv235hMrBZ XDSxHqb8lOjnA== From: Pratyush Yadav To: Mike Rapoport Cc: Andrew Morton , Alexander Graf , Baoquan He , Changyuan Lyu , Chris Li , Jason Gunthorpe , Pasha Tatashin , Pratyush Yadav , kexec@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 3/4] kho: add support for preserving vmalloc allocations In-Reply-To: <20250917174033.3810435-4-rppt@kernel.org> References: <20250917174033.3810435-1-rppt@kernel.org> <20250917174033.3810435-4-rppt@kernel.org> Date: Thu, 18 Sep 2025 12:33:56 +0200 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Stat-Signature: r4fdpckmjxcajew1zmsojrgtgoam6z1e X-Rspam-User: X-Rspamd-Queue-Id: AA14520009 X-Rspamd-Server: rspam04 X-HE-Tag: 1758191640-589891 X-HE-Meta: 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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 Wed, Sep 17 2025, Mike Rapoport wrote: > From: "Mike Rapoport (Microsoft)" > > A vmalloc allocation is preserved using binary structure similar to > global KHO memory tracker. It's a linked list of pages where each page > is an array of physical address of pages in vmalloc area. > > kho_preserve_vmalloc() hands out the physical address of the head page > to the caller. This address is used as the argument to > kho_vmalloc_restore() to restore the mapping in the vmalloc address > space and populate it with the preserved pages. > > Signed-off-by: Mike Rapoport (Microsoft) Reviewed-by: Pratyush Yadav [...] -- Regards, Pratyush Yadav