From: Jason Gunthorpe <jgg@nvidia.com>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: Yishai Hadas <yishaih@nvidia.com>,
bhelgaas@google.com, saeedm@nvidia.com,
linux-pci@vger.kernel.org, kvm@vger.kernel.org,
netdev@vger.kernel.org, kuba@kernel.org, leonro@nvidia.com,
kwankhede@nvidia.com, mgurtovoy@nvidia.com, maorg@nvidia.com
Subject: Re: [PATCH V4 mlx5-next 13/13] vfio/mlx5: Use its own PCI reset_done error handler
Date: Wed, 27 Oct 2021 13:53:35 -0300 [thread overview]
Message-ID: <20211027165335.GF2744544@nvidia.com> (raw)
In-Reply-To: <20211027104855.7d35be05.alex.williamson@redhat.com>
On Wed, Oct 27, 2021 at 10:48:55AM -0600, Alex Williamson wrote:
> Ok, I see. I didn't digest that contention on state_mutex can only
> occur from a concurrent migration region access and the stale state is
> resolved at the end of that concurrent access, not some subsequent
> access.
Ah, I see, yes, that is tricky - the spinlock around the mutex
provides the guarentee: deferral cannot be set at mutex_lock() time.
Jason
prev parent reply other threads:[~2021-10-27 16:53 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-26 9:05 [PATCH V4 mlx5-next 00/13] Add mlx5 live migration driver Yishai Hadas
2021-10-26 9:05 ` [PATCH V4 mlx5-next 01/13] PCI/IOV: Add pci_iov_vf_id() to get VF index Yishai Hadas
2021-10-26 9:05 ` [PATCH V4 mlx5-next 02/13] net/mlx5: Reuse exported virtfn index function call Yishai Hadas
2021-10-26 9:05 ` [PATCH V4 mlx5-next 03/13] net/mlx5: Disable SRIOV before PF removal Yishai Hadas
2021-10-26 9:05 ` [PATCH V4 mlx5-next 04/13] PCI/IOV: Add pci_iov_get_pf_drvdata() to allow VF reaching the drvdata of a PF Yishai Hadas
2021-10-26 9:05 ` [PATCH V4 mlx5-next 05/13] net/mlx5: Expose APIs to get/put the mlx5 core device Yishai Hadas
2021-10-26 9:05 ` [PATCH V4 mlx5-next 06/13] vfio: Fix VFIO_DEVICE_STATE_SET_ERROR macro Yishai Hadas
2021-10-26 15:32 ` Cornelia Huck
2021-10-26 15:50 ` Alex Williamson
2021-10-26 15:56 ` Cornelia Huck
2021-10-26 16:18 ` Leon Romanovsky
2021-10-26 16:32 ` Cornelia Huck
2021-10-26 16:42 ` Leon Romanovsky
2021-10-26 16:57 ` Cornelia Huck
2021-10-26 9:05 ` [PATCH V4 mlx5-next 07/13] vfio: Add a macro for VFIO_DEVICE_STATE_ERROR Yishai Hadas
2021-10-26 15:37 ` Cornelia Huck
2021-10-26 9:06 ` [PATCH V4 mlx5-next 08/13] vfio/pci_core: Make the region->release() function optional Yishai Hadas
2021-10-26 9:06 ` [PATCH V4 mlx5-next 09/13] net/mlx5: Introduce migration bits and structures Yishai Hadas
2021-10-26 9:06 ` [PATCH V4 mlx5-next 10/13] vfio/mlx5: Expose migration commands over mlx5 device Yishai Hadas
2021-10-26 9:06 ` [PATCH V4 mlx5-next 11/13] vfio/mlx5: Implement vfio_pci driver for mlx5 devices Yishai Hadas
2021-10-26 22:42 ` Alex Williamson
2021-10-26 23:46 ` Jason Gunthorpe
2021-10-26 9:06 ` [PATCH V4 mlx5-next 12/13] vfio/pci: Expose vfio_pci_aer_err_detected() Yishai Hadas
2021-10-26 22:45 ` Alex Williamson
2021-10-26 9:06 ` [PATCH V4 mlx5-next 13/13] vfio/mlx5: Use its own PCI reset_done error handler Yishai Hadas
2021-10-26 23:16 ` Alex Williamson
2021-10-26 23:50 ` Jason Gunthorpe
2021-10-27 15:29 ` Alex Williamson
2021-10-27 15:53 ` Jason Gunthorpe
2021-10-27 16:48 ` Alex Williamson
2021-10-27 16:53 ` Jason Gunthorpe [this message]
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