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b=puQeAZObx6LcsJjZvu1WHP+8Qjize0ip9P2cmvV8hYk+1hbARQsBepTiOkBvWthHE APtvhoP5m8I/E1y18V1kD/BTX+C9Pm/HjCuQycbFK5Jfpa+ZiRcj/X5jsQaWJ9yA+Z gZ/MVR+TMtwrBvUy/REkOHTbIlNzOpb6jzNWtJHsZ4tT6+SSq2ep9KlR1Fsb5yi0rh 3mZuRSvjEI/bYoelZD7EGAAq6Dn80fISgjTt8OAIkRxPbeKMYn2JqYdjFWaqkD5+fj svxk+yuFxLyw188ejvfehH9ozLGi75STutLaHibMhH6Z6IOF0uCXaxI2yaRttJVO7G jOJaHcSyl23Sw== Date: Thu, 30 Apr 2026 16:06:42 -0500 From: Bjorn Helgaas To: David Matlack Cc: Pasha Tatashin , Pratyush Yadav , iommu@lists.linux.dev, kexec@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, Adithya Jayachandran , Alexander Graf , Alex Williamson , Bjorn Helgaas , Chris Li , David Rientjes , Jacob Pan , Jason Gunthorpe , Joerg Roedel , Jonathan Corbet , Josh Hilke , Leon Romanovsky , Lukas Wunner , Mike Rapoport , Parav Pandit , Pranjal Shrivastava , Robin Murphy , Saeed Mahameed , Samiullah Khawaja , Shuah Khan , Will Deacon , William Tu , Yi Liu Subject: Re: [PATCH v4 01/11] PCI: liveupdate: Set up FLB handler for the PCI core Message-ID: <20260430210642.GA439800@bhelgaas> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 4E3664000D X-Rspam-User: X-Stat-Signature: ar7iddkpeppfqtogknyf9d5ch3917fa1 X-HE-Tag: 1777583205-878072 X-HE-Meta: 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 /CPx/Cc0 QDwo1+cL9KqID2aKI9jpPpBM3tVxM8fSak2mldpqDkVLj1YS5HNLZHjIrYG0KQsyJE8bF8dT/EDyhvMfeh7dO+7d1cR6d7JQz4FJCGhWvfzFqbajWT6LdKQiXDoiAR8ohqD4mzo4CXv7q3TvVKa3Llqy/4YU6f7GPlMRPjiOfY/Ju/VGgD3v7PJ0rOO+E6urOowVOdpAr9LPXZ6npQFROCxPkjm9FC6SMr8ONYdjwGGjtPPLVSzJgwrwsjz6u0lweD1V2XE+9uLtsIM9OPG7VAnxgYum2GGmZIdBMy7Vh3hHFVGqnPSON8IeTu441n8TQ1XDdxOAB2HSyI+XHOt+DzF7GVF/VShs5roMHm2DoRQxv0L0= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Apr 28, 2026 at 11:47:23PM +0000, David Matlack wrote: > On 2026-04-28 05:50 PM, Pasha Tatashin wrote: > > On 04-27 23:59, David Matlack wrote: > > > On 2026-04-24 01:29 PM, Pasha Tatashin wrote: > > > > On 04-24 14:33, Pratyush Yadav wrote: > > > > > On Thu, Apr 23 2026, David Matlack wrote: > > > > > [...] > > > > > > diff --git a/MAINTAINERS b/MAINTAINERS > > > > > > index c9b7b6f9828e..94af31837375 100644 > > > > > > --- a/MAINTAINERS > > > > > > +++ b/MAINTAINERS > > > > > > @@ -20555,6 +20555,18 @@ L: linux-pci@vger.kernel.org > > > > > > S: Supported > > > > > > F: Documentation/PCI/pci-error-recovery.rst > > > > > > > > > > > > +PCI LIVE UPDATE > > > > > > +M: Bjorn Helgaas > > > > > > +M: David Matlack > > > > > > +L: linux-pci@vger.kernel.org > > > > > > +S: Supported > > > > > > +Q: https://patchwork.kernel.org/project/linux-pci/list/ > > > > > > +B: https://bugzilla.kernel.org > > > > > > +C: irc://irc.oftc.net/linux-pci > > > > > > +T: git git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git > > > > > > +F: drivers/pci/liveupdate.c > > > > > > +F: include/linux/kho/abi/pci.h > > > > > > + > > > > > > > > > > Can we please also add these files under the "LIVE UPDATE" entry. The > > > > > code here concerns both live update and PCI. > > > > > > Covering that intersection of Live Update and PCI was exactly my > > > intention with introducing this new PCI LIVE UPDATE entry. This ensures > > > we have maintenance coverage with knowledge of that intersection. > > > > > > > > We can figure out the > > > > > maintenance details as we go along, but I think the live update > > > > > maintainers should at least get all the patches for PCI live update. > ... > > This is the way we agreed to handle kexec changes: Baoquan He is the > > maintainer, and without his Reviewed-by tag, we won't take changes to > > kexec. This is the approach we follow with MM for KHO changes to > > memblock and memfd preservation, as well as the upcoming > > hugetlb/guestmemfd preservation. > > > > This is also the approach we should continue using when adding LUO > > support to other components like PCI, VFIO, IOMMU, and KVM. It keeps > > life easier for the core component maintainers and ensures we do not > > regress LU by staging everything in the same tree and sending LU merge > > requests from a single tree. > > Ok it sounds like we are aligned on keeping drivers/pci/liveupdate.c, > include/linux/kho/abi/pci.h, and Documentation/PCI/liveupdate.rst in the > PCI LIVE UPDATE entry and not duplicating them in the LIVE UPDATE entry. > > I think the only open question is what tree to use for the PCI LIVE > UPDATE entry, PCI tree or Live Update tree. You are proposing the Live > Update tree. > > Bjorn are you ok with that approach? Yes, I think that makes sense, at least to start. In early days, it would probably be a headache to coordinate LU things across multiple trees.