From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7170C372B4F; Thu, 30 Apr 2026 21:06:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777583204; cv=none; b=DhiBl9NPww5ooOkKYGSf8VDLe3+pT2xsAnulk3ObJ2vzSEcWGzgStxNTtW7reUaYdyTJO+KdM87KvrozZuSpygh6AaJkZdEvtKbPE8DRWMJimqqoes+gNk1tG1gyTXlQ+cgQjnWXHfn6AuovdKIjxvdhzolf30ed9SUgd/5eD+4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777583204; c=relaxed/simple; bh=fSFeh7LyM/VW+wkyTESwF1r98DYurH8l0qUBEQElk78=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; b=EZCcGsnvTI103uvaKb30A+ujVBLiYisr6Vw1wbxobuU+dnkC6rs95jtbTLSBNKBjvfxbnKUYko9ll98OvmS8guITzNkRS2ybWMCXO+tbGkWCKcJsaHZiDdquyLHtPWbrO4TVmOPfc4LRpF+63XwbmZrfSlGMkYhEs+coUKbPnz4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=puQeAZOb; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="puQeAZOb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E40FAC2BCB3; Thu, 30 Apr 2026 21:06:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777583204; bh=fSFeh7LyM/VW+wkyTESwF1r98DYurH8l0qUBEQElk78=; h=Date:From:To:Cc:Subject:In-Reply-To:From; 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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.