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b=NlGZSzs/gjXRpoS8cRAEp1qvHOvKXm57Xwd+WjSh1mksdHHhasQJmBYSpkHquvZxI iBczxb6BlR85sfINTRuz3WqEo4Xrfx+zTFBO+lsV2+aHxvDsb9X1NDWVZ/O6Ha2QX4 YF7JdeVoO4fOK9uGEO+rtzsGc3kIg78Tqk2xZmTvFJu9xySYA6BHC8D42OdHeYQbYC wBoZM4NECr8iTylm62lwf/QUY793pls70cfJPaVLdci14RLQy4alTmOhWkxSCkU2Ck AvLFWWnwkkwz3uJTET1QKF0Mo/wlkZAyOMeMqub+oNkn98sPzhYO75M3dv8ZJkNfMo q1nIqyLI2sYDw== Date: Wed, 17 Jun 2026 22:00:39 +0300 From: Mike Rapoport To: Samiullah Khawaja Cc: Pasha Tatashin , Pratyush Yadav , Alexander Graf , David Matlack , tarunsahu@google.com, open list , "open list:KEXEC HANDOVER (KHO)" , "open list:KEXEC HANDOVER (KHO)" Subject: Re: [PATCH 0/1] liveupdate: Add internal APIs for file preservation Message-ID: References: <20260613012521.835490-1-skhawaja@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260613012521.835490-1-skhawaja@google.com> X-Rspamd-Queue-Id: 73EC2160023 X-Rspam-User: X-Stat-Signature: n41h38y67k4apjf6u58cttu87oo6wze9 X-Rspamd-Server: rspam08 X-HE-Tag: 1781722847-541719 X-HE-Meta: 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 b0j4ei2d zrNhIV/wCN3pL2eLcDtGrUWskUzFnG2kbxZYzDuHVA9nBq5aWIUEU6k6hkbVoamMplEQ/39EPCKZWDxbBPkDqQ3nZaRunEsvv7C97ebCIZz42ywG+lIDm68XYdrmeEsyCxv4HLuNv6aCZ59kcujTac34W1HzdkLpfO2tgWjxZfdZFvgwrs7c2brT24jEeGCtfnD6vyZ292R8pkyHO18RW+snYGAmNTMpPQgUHebf5QG5QDSXF6i2E1SRSrmFETGaVy1P9s1TMruHy+iO2iDJFNlssuL0Y0Sa8IrIHQQuu9vkESGM= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Sami, On Sat, Jun 13, 2026 at 01:25:19AM +0000, Samiullah Khawaja wrote: > Live update orchestrator file handlers depend on the preservation of > other files. To make sure that the dependency is preserved, the file > handlers needs to fetch the preservation token of the preserved > dependency. Similarly during restore, a file handler wants to fetch the > restored file of the dependency. This will have to wait until -rc1 is out. I'm thinking about taking it to a branch in the liveupdate tree and keeping there until a patchset that uses it, be it iommu or kvm matures. > There are two known usecases of this, > > - VFIO-Cdev preservation requires the preservation of iommufd. This is > required by the IOMMU preservation series: > https://lore.kernel.org/all/20260427175633.1978233-1-skhawaja@google.com/ > - guest_memfd preservation requires the preservation of kvmfd. This is > required by the guest_memfd preservation series: > https://lore.kernel.org/all/20ae20f9d1a198b289444ebb4c824314cbba1bcf.1780676742.git.tarunsahu@google.com/ -- Sincerely yours, Mike.