From: Jason Gunthorpe <jgg@nvidia.com>
To: Eric Farman <farman@linux.ibm.com>
Cc: Matthew Rosato <mjrosato@linux.ibm.com>,
Alex Williamson <alex.williamson@redhat.com>,
Liu Yi L <yi.l.liu@intel.com>, Halil Pasic <pasic@linux.ibm.com>,
kvm@vger.kernel.org, linux-s390@vger.kernel.org,
Michael Kawano <mkawano@linux.ibm.com>,
Kirti Wankhede <kwankhede@nvidia.com>
Subject: Re: [PATCH v1 01/18] vfio/ccw: Remove UUID from s390 debug log
Date: Thu, 2 Jun 2022 15:55:36 -0300 [thread overview]
Message-ID: <20220602185536.GY1343366@nvidia.com> (raw)
In-Reply-To: <20220602171948.2790690-2-farman@linux.ibm.com>
On Thu, Jun 02, 2022 at 07:19:31PM +0200, Eric Farman wrote:
> From: Michael Kawano <mkawano@linux.ibm.com>
>
> As vfio-ccw devices are created/destroyed, the uuid of the associated
> mdevs that are recorded in $S390DBF/vfio_ccw_msg/sprintf get lost as
> they are created using pointers passed by reference.
>
> This is a deliberate design point of s390dbf, but it leaves the uuid
> in these traces less than useful. Since the subchannels are more
> constant, and are mapped 1:1 with the mdevs, the associated mdev can
> be discerned by looking at the device configuration (e.g., mdevctl)
> and places, such as kernel messages, where it is statically stored.
I don't quite understand these two paragraphs, but the change looks OK
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Jason
next prev parent reply other threads:[~2022-06-02 18:55 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-02 17:19 [PATCH v1 00/18] VFIO ccw/mdev rework Eric Farman
2022-06-02 17:19 ` [PATCH v1 01/18] vfio/ccw: Remove UUID from s390 debug log Eric Farman
2022-06-02 18:55 ` Jason Gunthorpe [this message]
2022-06-02 19:51 ` Matthew Rosato
2022-06-03 19:03 ` Eric Farman
2022-06-06 20:45 ` Matthew Rosato
2022-06-02 17:19 ` [PATCH v1 02/18] vfio/ccw: Fix FSM state if mdev probe fails Eric Farman
2022-06-02 18:58 ` Jason Gunthorpe
2022-06-03 13:21 ` Matthew Rosato
2022-06-03 19:12 ` Eric Farman
2022-06-06 20:44 ` Matthew Rosato
2022-06-02 17:19 ` [PATCH v1 03/18] vfio/ccw: Ensure mdev->dev is cleared on mdev remove Eric Farman
2022-06-03 13:25 ` Matthew Rosato
2022-06-03 13:37 ` Jason Gunthorpe
2022-06-03 15:20 ` Tony Krowiak
2022-06-02 17:19 ` [PATCH v1 04/18] vfio/ccw: Do not change FSM state in subchannel event Eric Farman
2022-06-02 17:19 ` [PATCH v1 05/18] vfio/ccw: Remove private->mdev Eric Farman
2022-06-02 19:02 ` Jason Gunthorpe
2022-06-02 19:13 ` Eric Farman
2022-06-02 17:19 ` [PATCH v1 06/18] vfio/ccw: Pass enum to FSM event jumptable Eric Farman
2022-06-02 19:02 ` Jason Gunthorpe
2022-06-02 19:22 ` Matthew Rosato
2022-06-02 17:19 ` [PATCH v1 07/18] vfio/ccw: Flatten MDEV device (un)register Eric Farman
2022-06-02 19:03 ` Jason Gunthorpe
2022-06-02 19:14 ` Matthew Rosato
2022-06-03 20:38 ` Eric Farman
2022-06-02 17:19 ` [PATCH v1 08/18] vfio/ccw: Check that private pointer is not NULL Eric Farman
2022-06-02 19:04 ` Matthew Rosato
2022-06-02 19:05 ` Jason Gunthorpe
2022-06-02 17:19 ` [PATCH v1 09/18] vfio/ccw: Create an OPEN FSM Event Eric Farman
2022-06-02 19:08 ` Jason Gunthorpe
2022-06-02 17:19 ` [PATCH v1 10/18] vfio/ccw: Create a CLOSE FSM event Eric Farman
2022-06-02 19:10 ` Jason Gunthorpe
2022-06-02 17:19 ` [PATCH v1 11/18] vfio/ccw: Refactor vfio_ccw_mdev_reset Eric Farman
2022-06-02 19:11 ` Jason Gunthorpe
2022-06-02 17:19 ` [PATCH v1 12/18] vfio/ccw: Move FSM open/close to MDEV open/close Eric Farman
2022-06-02 19:14 ` Jason Gunthorpe
2022-06-02 17:19 ` [PATCH v1 13/18] vfio/mdev: Consolidate all the device_api sysfs into the core code Eric Farman
2022-06-03 6:36 ` Christoph Hellwig
2022-06-03 14:55 ` Tony Krowiak
2022-06-06 19:43 ` Kirti Wankhede
2022-06-10 7:22 ` Tian, Kevin
2022-06-02 17:19 ` [PATCH v1 14/18] vfio/mdev: Add mdev available instance checking to the core Eric Farman
2022-06-03 15:02 ` Tony Krowiak
2022-06-06 20:02 ` Kirti Wankhede
2022-06-06 20:23 ` Eric Farman
2022-06-06 20:37 ` Matthew Rosato
2022-06-10 7:43 ` Tian, Kevin
2022-06-13 6:46 ` Christoph Hellwig
2022-06-13 14:08 ` Eric Farman
2022-06-02 17:19 ` [PATCH v1 15/18] vfio/ccw: Manage private with mdev Eric Farman
2022-06-02 17:19 ` [PATCH v1 16/18] vfio/ccw: Create a get_private routine Eric Farman
2022-06-02 19:17 ` Jason Gunthorpe
2022-06-02 17:19 ` [PATCH v1 17/18] vfio: Export vfio_device_try_get() Eric Farman
2022-06-03 7:46 ` Cornelia Huck
2022-06-02 17:19 ` [PATCH v1 18/18] vfio/ccw: Manage ccw/mdev reference counts Eric Farman
2022-06-02 19:20 ` Jason Gunthorpe
2022-06-02 19:29 ` [PATCH v1 00/18] VFIO ccw/mdev rework Jason Gunthorpe
2022-06-10 4:11 ` Yi Liu
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