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From: Bjorn Helgaas <helgaas@kernel.org>
To: Joerg Roedel <joro@8bytes.org>
Cc: Jason Gunthorpe <jgg@nvidia.com>,
	Stuart Yoder <stuyoder@gmail.com>,
	rafael@kernel.org, David Airlie <airlied@linux.ie>,
	linux-pci@vger.kernel.org,
	Thierry Reding <thierry.reding@gmail.com>,
	Diana Craciun <diana.craciun@oss.nxp.com>,
	Dmitry Osipenko <digetx@gmail.com>, Will Deacon <will@kernel.org>,
	Ashok Raj <ashok.raj@intel.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Christoph Hellwig <hch@infradead.org>,
	Kevin Tian <kevin.tian@intel.com>,
	Chaitanya Kulkarni <kch@nvidia.com>,
	Alex Williamson <alex.williamson@redhat.com>,
	kvm@vger.kernel.org, Bjorn Helgaas <bhelgaas@google.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Cornelia Huck <cohuck@redhat.com>,
	linux-kernel@vger.kernel.org, Li Yang <leoyang.li@nxp.com>,
	iommu@lists.linux-foundation.org,
	Jacob jun Pan <jacob.jun.pan@intel.com>,
	Daniel Vetter <daniel@ffwll.ch>,
	Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH v8 00/11] Fix BUG_ON in vfio_iommu_group_notifier()
Date: Fri, 8 Apr 2022 10:59:22 -0500	[thread overview]
Message-ID: <20220408155922.GA317094@bhelgaas> (raw)
In-Reply-To: <YlBWrE7kxX9vraOD@8bytes.org>

On Fri, Apr 08, 2022 at 05:37:16PM +0200, Joerg Roedel wrote:
> On Fri, Apr 08, 2022 at 11:17:47AM -0300, Jason Gunthorpe wrote:
> > You might consider using a linear tree instead of the topic branches,
> > topics are tricky and I'm not sure it helps a small subsystem so much.
> > Conflicts between topics are a PITA for everyone, and it makes
> > handling conflicts with rc much harder than it needs to be.
> 
> I like the concept of a branch per driver, because with that I can just
> exclude that branch from my next-merge when there are issues with it.
> Conflicts between branches happen too, but they are quite manageable
> when the branches have the same base.

FWIW, I use the same topic branch approach for PCI.  I like the
ability to squash in fixes or drop things without having to clutter
the history with trivial commits and reverts.  I haven't found
conflicts to be a problem.

Bjorn

WARNING: multiple messages have this Message-ID (diff)
From: Bjorn Helgaas <helgaas@kernel.org>
To: Joerg Roedel <joro@8bytes.org>
Cc: kvm@vger.kernel.org, rafael@kernel.org,
	David Airlie <airlied@linux.ie>,
	linux-pci@vger.kernel.org,
	Thierry Reding <thierry.reding@gmail.com>,
	Diana Craciun <diana.craciun@oss.nxp.com>,
	Dmitry Osipenko <digetx@gmail.com>, Will Deacon <will@kernel.org>,
	Ashok Raj <ashok.raj@intel.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Christoph Hellwig <hch@infradead.org>,
	Stuart Yoder <stuyoder@gmail.com>,
	Kevin Tian <kevin.tian@intel.com>,
	Chaitanya Kulkarni <kch@nvidia.com>,
	Jason Gunthorpe <jgg@nvidia.com>,
	Alex Williamson <alex.williamson@redhat.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Cornelia Huck <cohuck@redhat.com>,
	linux-kernel@vger.kernel.org, Li Yang <leoyang.li@nxp.com>,
	iommu@lists.linux-foundation.org,
	Jacob jun Pan <jacob.jun.pan@intel.com>,
	Daniel Vetter <daniel@ffwll.ch>,
	Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH v8 00/11] Fix BUG_ON in vfio_iommu_group_notifier()
Date: Fri, 8 Apr 2022 10:59:22 -0500	[thread overview]
Message-ID: <20220408155922.GA317094@bhelgaas> (raw)
In-Reply-To: <YlBWrE7kxX9vraOD@8bytes.org>

On Fri, Apr 08, 2022 at 05:37:16PM +0200, Joerg Roedel wrote:
> On Fri, Apr 08, 2022 at 11:17:47AM -0300, Jason Gunthorpe wrote:
> > You might consider using a linear tree instead of the topic branches,
> > topics are tricky and I'm not sure it helps a small subsystem so much.
> > Conflicts between topics are a PITA for everyone, and it makes
> > handling conflicts with rc much harder than it needs to be.
> 
> I like the concept of a branch per driver, because with that I can just
> exclude that branch from my next-merge when there are issues with it.
> Conflicts between branches happen too, but they are quite manageable
> when the branches have the same base.

FWIW, I use the same topic branch approach for PCI.  I like the
ability to squash in fixes or drop things without having to clutter
the history with trivial commits and reverts.  I haven't found
conflicts to be a problem.

Bjorn
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

  reply	other threads:[~2022-04-08 15:59 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-08  5:44 [PATCH v8 00/11] Fix BUG_ON in vfio_iommu_group_notifier() Lu Baolu
2022-03-08  5:44 ` Lu Baolu
2022-03-08  5:44 ` [PATCH v8 01/11] iommu: Add DMA ownership management interfaces Lu Baolu
2022-03-08  5:44   ` Lu Baolu
2022-03-08 13:37   ` Robin Murphy
2022-03-08 13:37     ` Robin Murphy
2022-03-08  5:44 ` [PATCH v8 02/11] driver core: Add dma_cleanup callback in bus_type Lu Baolu
2022-03-08  5:44   ` Lu Baolu
2022-03-08  5:44 ` [PATCH v8 03/11] amba: Stop sharing platform_dma_configure() Lu Baolu
2022-03-08  5:44   ` Lu Baolu
2022-03-08  5:44 ` [PATCH v8 04/11] bus: platform, amba, fsl-mc, PCI: Add device DMA ownership management Lu Baolu
2022-03-08  5:44   ` [PATCH v8 04/11] bus: platform,amba,fsl-mc,PCI: " Lu Baolu
2022-03-08 13:39   ` Robin Murphy
2022-03-08 13:39     ` Robin Murphy
2022-03-08  5:44 ` [PATCH v8 05/11] PCI: pci_stub: Set driver_managed_dma Lu Baolu
2022-03-08  5:44   ` Lu Baolu
2022-03-08  5:44 ` [PATCH v8 06/11] PCI: portdrv: " Lu Baolu
2022-03-08  5:44   ` Lu Baolu
2022-03-08  5:44 ` [PATCH v8 07/11] vfio: Set DMA ownership for VFIO devices Lu Baolu
2022-03-08  5:44   ` Lu Baolu
2022-03-08  5:44 ` [PATCH v8 08/11] vfio: Remove use of vfio_group_viable() Lu Baolu
2022-03-08  5:44   ` Lu Baolu
2022-03-08  5:44 ` [PATCH v8 09/11] vfio: Delete the unbound_list Lu Baolu
2022-03-08  5:44   ` Lu Baolu
2022-03-08  5:44 ` [PATCH v8 10/11] vfio: Remove iommu group notifier Lu Baolu
2022-03-08  5:44   ` Lu Baolu
2022-03-08  5:44 ` [PATCH v8 11/11] iommu: Remove iommu group changes notifier Lu Baolu
2022-03-08  5:44   ` Lu Baolu
2022-03-10  9:46 ` [PATCH v8 00/11] Fix BUG_ON in vfio_iommu_group_notifier() Eric Auger
2022-03-10  9:46   ` Eric Auger
2022-03-15  0:21 ` Jason Gunthorpe
2022-03-15  0:21   ` Jason Gunthorpe via iommu
2022-04-08  7:57   ` Joerg Roedel
2022-04-08  7:57     ` Joerg Roedel
2022-04-08 12:22     ` Lu Baolu
2022-04-08 12:22       ` Lu Baolu
2022-04-08 12:23       ` Jason Gunthorpe
2022-04-08 12:23         ` Jason Gunthorpe via iommu
2022-04-08 14:00         ` Joerg Roedel
2022-04-08 14:00           ` Joerg Roedel
2022-04-08 14:17           ` Jason Gunthorpe
2022-04-08 14:17             ` Jason Gunthorpe via iommu
2022-04-08 15:37             ` Joerg Roedel
2022-04-08 15:37               ` Joerg Roedel
2022-04-08 15:59               ` Bjorn Helgaas [this message]
2022-04-08 15:59                 ` Bjorn Helgaas
2022-04-08 16:07                 ` Alex Williamson
2022-04-08 16:07                   ` Alex Williamson
2022-04-08 20:24                   ` Jason Gunthorpe
2022-04-08 20:24                     ` Jason Gunthorpe via iommu

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