From: Jason Gunthorpe <jgg@nvidia.com>
To: "Tian, Kevin" <kevin.tian@intel.com>
Cc: "iommu@lists.linux.dev" <iommu@lists.linux.dev>,
"linux-kselftest@vger.kernel.org"
<linux-kselftest@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Nicolin Chen <nicolinc@nvidia.com>,
"Liu, Yi L" <yi.l.liu@intel.com>
Subject: Re: [PATCH 02/14] iommufd: Add iommufd_group
Date: Mon, 6 Mar 2023 15:16:36 -0400 [thread overview]
Message-ID: <ZAY8FI398003FEPX@nvidia.com> (raw)
In-Reply-To: <BN9PR11MB5276F5AC80DE63A6F5B020ED8CB39@BN9PR11MB5276.namprd11.prod.outlook.com>
On Fri, Mar 03, 2023 at 02:13:30AM +0000, Tian, Kevin wrote:
> > From: Jason Gunthorpe <jgg@nvidia.com>
> > Sent: Thursday, March 2, 2023 8:52 PM
> >
> >
> > > > @@ -98,7 +195,7 @@ struct iommufd_device
> > *iommufd_device_bind(struct
> > > > iommufd_ctx *ictx,
> > > > /* The calling driver is a user until iommufd_device_unbind() */
> > > > refcount_inc(&idev->obj.users);
> > > > /* group refcount moves into iommufd_device */
> > > > - idev->group = group;
> > > > + idev->igroup = igroup;
> > >
> > > the comment about group refcount is stale now.
> >
> > You mean it should say 'igroup refcount' ?
> >
>
> The original comment refers to the refcnt of iommu group.
>
> Now that refcnt is held by iommufd_group and no movement per se.
igroup has a reference as well and it is this reference that is now
being moved
Jason
next prev parent reply other threads:[~2023-03-06 19:16 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-25 0:27 [PATCH 00/14] Add iommufd physical device operations for replace and alloc hwpt Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 01/14] iommufd: Move isolated msi enforcement to iommufd_device_bind() Jason Gunthorpe
2023-03-02 7:45 ` Tian, Kevin
2023-02-25 0:27 ` [PATCH 02/14] iommufd: Add iommufd_group Jason Gunthorpe
2023-03-02 7:55 ` Tian, Kevin
2023-03-02 12:51 ` Jason Gunthorpe
2023-03-03 2:13 ` Tian, Kevin
2023-03-06 19:16 ` Jason Gunthorpe [this message]
2023-03-07 2:32 ` Tian, Kevin
2023-02-25 0:27 ` [PATCH 03/14] iommufd: Replace the hwpt->devices list with iommufd_group Jason Gunthorpe
2023-03-02 8:01 ` Tian, Kevin
2023-03-06 20:22 ` Jason Gunthorpe
2023-03-07 2:38 ` Tian, Kevin
2023-03-07 13:53 ` Jason Gunthorpe
2023-03-08 7:29 ` Tian, Kevin
2023-03-08 19:00 ` Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 04/14] iommufd: Use the iommufd_group to avoid duplicate reserved groups and msi setup Jason Gunthorpe
2023-03-02 8:06 ` Tian, Kevin
2023-03-02 12:55 ` Jason Gunthorpe
2023-03-03 2:16 ` Tian, Kevin
2023-02-25 0:27 ` [PATCH 05/14] iommufd: Make sw_msi_start a group global Jason Gunthorpe
2023-03-02 8:09 ` Tian, Kevin
2023-03-06 20:27 ` Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 06/14] iommufd: Move putting a hwpt to a helper function Jason Gunthorpe
2023-03-02 8:12 ` Tian, Kevin
2023-03-06 20:29 ` Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 07/14] iommufd: Add enforced_cache_coherency to iommufd_hw_pagetable_alloc() Jason Gunthorpe
2023-03-02 8:14 ` Tian, Kevin
2023-02-25 0:27 ` [PATCH 08/14] iommu: Introduce a new iommu_group_replace_domain() API Jason Gunthorpe
2023-03-02 8:16 ` Tian, Kevin
2023-02-25 0:27 ` [PATCH 09/14] iommufd: Add iommufd_device_replace() Jason Gunthorpe
2023-02-26 3:01 ` Baolu Lu
2023-02-27 13:58 ` Jason Gunthorpe
2023-02-28 1:50 ` Baolu Lu
2023-02-28 13:51 ` Jason Gunthorpe
2023-03-01 1:55 ` Baolu Lu
2023-02-26 3:13 ` Baolu Lu
2023-02-27 14:00 ` Jason Gunthorpe
2023-02-28 2:10 ` Baolu Lu
2023-02-28 13:52 ` Jason Gunthorpe
2023-03-01 2:23 ` Baolu Lu
2023-03-02 8:20 ` Tian, Kevin
2023-03-06 20:44 ` Jason Gunthorpe
2023-03-07 2:42 ` Tian, Kevin
2023-03-07 13:54 ` Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 10/14] iommufd: Make destroy_rwsem use a lock class per object type Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 11/14] iommufd/selftest: Test iommufd_device_replace() Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 12/14] iommufd: Add IOMMU_HWPT_ALLOC Jason Gunthorpe
2023-03-06 1:42 ` Nicolin Chen
2023-03-06 20:31 ` Jason Gunthorpe
2023-03-17 3:02 ` Tian, Kevin
2023-03-17 4:02 ` Nicolin Chen
2023-03-17 10:20 ` Tian, Kevin
2023-03-21 17:16 ` Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 13/14] iommufd/selftest: Return the real idev id from selftest mock_domain Jason Gunthorpe
2023-02-25 0:27 ` [PATCH 14/14] iommufd/selftest: Add a selftest for IOMMU_HWPT_ALLOC Jason Gunthorpe
2023-02-26 19:29 ` Nicolin Chen
2023-02-27 15:02 ` Jason Gunthorpe
2023-02-28 0:17 ` Nicolin Chen
2023-03-07 8:42 ` [PATCH 00/14] Add iommufd physical device operations for replace and alloc hwpt Tian, Kevin
2023-03-07 12:46 ` Jason Gunthorpe
2023-03-08 2:08 ` Baolu Lu
2023-03-08 7:38 ` Tian, Kevin
2023-03-08 18:59 ` Jason Gunthorpe
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