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From: Joerg Roedel <joro@8bytes.org>
To: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	ashok.raj@intel.com, jacob.jun.pan@intel.com,
	kevin.tian@intel.com, Christoph Hellwig <hch@lst.de>,
	Robin Murphy <robin.murphy@arm.com>,
	iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 3/4] iommu: Preallocate iommu group when probing devices
Date: Fri, 17 Jan 2020 11:21:51 +0100	[thread overview]
Message-ID: <20200117102151.GF15760@8bytes.org> (raw)
In-Reply-To: <20200101052648.14295-4-baolu.lu@linux.intel.com>

On Wed, Jan 01, 2020 at 01:26:47PM +0800, Lu Baolu wrote:
> This splits iommu group allocation from adding devices. This makes
> it possible to determine the default domain type for each group as
> all devices belonging to the group have been determined.

I think its better to keep group allocation as it is and just defer
default domain allocation after each device is in its group. But take
care about the device hotplug path which might add new devices to groups
which already have a default domain, or add new groups that might need a
default domain too.

Regards,

	Joerg


  reply	other threads:[~2020-01-17 10:21 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-01  5:26 [RFC PATCH 0/4] iommu: Per-group default domain type Lu Baolu
2020-01-01  5:26 ` [RFC PATCH 1/4] driver core: Add iommu_passthrough to struct device Lu Baolu
2020-01-01  5:26 ` [RFC PATCH 2/4] PCI: Add "pci=iommu_passthrough=" parameter for iommu passthrough Lu Baolu
2020-01-18  0:18   ` Bjorn Helgaas
2020-01-18  2:04     ` Lu Baolu
2020-01-21 14:17   ` Bjorn Helgaas
2020-01-22  4:49     ` Lu Baolu
2020-01-01  5:26 ` [RFC PATCH 3/4] iommu: Preallocate iommu group when probing devices Lu Baolu
2020-01-17 10:21   ` Joerg Roedel [this message]
2020-01-18  2:18     ` Lu Baolu
2020-01-19  6:29     ` Lu Baolu
2020-01-21 12:45       ` Robin Murphy
2020-01-22  5:39         ` Lu Baolu
2020-01-23 14:55           ` Robin Murphy
2020-01-01  5:26 ` [RFC PATCH 4/4] iommu: Determine default domain type before allocating domain Lu Baolu
2020-01-20  9:44 ` [RFC PATCH 0/4] iommu: Per-group default domain type John Garry
2020-01-21  0:43   ` Lu Baolu
2020-01-21 10:14     ` John Garry
2020-01-22  4:58       ` Lu Baolu

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