From: "Michael S. Tsirkin" <mst@redhat.com>
To: Parav Pandit <parav@nvidia.com>
Cc: "cohuck@redhat.com" <cohuck@redhat.com>,
"virtio-dev@lists.oasis-open.org"
<virtio-dev@lists.oasis-open.org>,
Max Gurtovoy <mgurtovoy@nvidia.com>,
Shahaf Shuler <shahafs@nvidia.com>, Oren Duer <oren@nvidia.com>
Subject: Re: [PATCH v2] Add device reset timeout field
Date: Fri, 8 Oct 2021 06:44:26 -0400 [thread overview]
Message-ID: <20211008063303-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <PH0PR12MB5481990F6F33697BB2F9B6D4DCB19@PH0PR12MB5481.namprd12.prod.outlook.com>
On Thu, Oct 07, 2021 at 03:42:24AM +0000, Parav Pandit wrote:
> > There's no reason for a driver to choose any value - it has nothing else to do.
> >
> At least for the devices that we are seeing, driver choosing a default value of 2 to 3 minutes is good enough and of course useful.
Well I don't get this of course yet. I guess it's useful for some
workloads, but VM being blocked for 2 minutes breaks lots of workloads.
Guests with 30 devices do exist, we are talking about an hour to start
these guest.
I wonder whether we should instead just provide some guidance on how long
is it ok for reset to take? Say if we want to address kata, <100ms boot
time, I guess we can recomment not more than 10ms? Anything
more would trigger at least a warning.
--
MST
next prev parent reply other threads:[~2021-10-08 10:44 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-06 14:10 [PATCH v2] Add device reset timeout field Parav Pandit
2021-10-06 15:22 ` Michael S. Tsirkin
2021-10-06 16:11 ` Parav Pandit
2021-10-06 20:53 ` Michael S. Tsirkin
2021-10-07 3:42 ` Parav Pandit
2021-10-07 16:10 ` [virtio-dev] " Cornelia Huck
2021-10-07 17:58 ` Parav Pandit
2021-10-08 10:00 ` [virtio-dev] " Cornelia Huck
2021-10-08 10:19 ` Parav Pandit
2021-10-08 10:12 ` Michael S. Tsirkin
2021-10-08 10:51 ` Parav Pandit
2021-10-08 11:18 ` [virtio-dev] " Michael S. Tsirkin
2021-10-08 12:55 ` Parav Pandit
2021-10-08 10:44 ` Michael S. Tsirkin [this message]
2021-10-08 10:59 ` Parav Pandit
2021-10-08 11:21 ` Michael S. Tsirkin
2021-10-08 11:45 ` Parav Pandit
2021-10-08 11:47 ` [virtio-dev] " Cornelia Huck
2021-10-08 12:12 ` Parav Pandit
2021-10-08 12:57 ` Michael S. Tsirkin
2021-10-08 13:23 ` Parav Pandit
2021-10-08 23:09 ` Michael S. Tsirkin
2021-10-11 14:29 ` Parav Pandit
2021-10-11 14:59 ` [virtio-dev] " Cornelia Huck
2021-10-11 15:44 ` Parav Pandit
2021-10-11 16:00 ` Michael S. Tsirkin
2021-10-12 8:51 ` Parav Pandit
2021-10-12 9:01 ` Michael S. Tsirkin
2021-10-12 9:12 ` Parav Pandit
2021-10-14 17:35 ` Parav Pandit
2021-10-14 22:28 ` Michael S. Tsirkin
2021-10-15 4:36 ` Parav Pandit
2021-10-15 5:15 ` [virtio-dev] " Jason Wang
2021-10-15 5:20 ` Parav Pandit
2021-10-15 6:40 ` Jason Wang
2021-10-15 6:42 ` Jason Wang
2021-10-15 6:48 ` Parav Pandit
2021-10-15 7:02 ` Jason Wang
2021-10-15 8:21 ` Parav Pandit
2021-10-15 8:42 ` Jason Wang
2021-10-22 7:20 ` Parav Pandit
2021-10-25 5:41 ` Jason Wang
2021-10-25 6:11 ` Parav Pandit
2021-10-26 4:03 ` Jason Wang
2021-10-27 8:04 ` Parav Pandit
2021-10-27 8:26 ` Michael S. Tsirkin
2021-10-28 4:01 ` Parav Pandit
2021-10-28 5:50 ` Michael S. Tsirkin
2021-10-28 6:06 ` Parav Pandit
2021-10-15 6:51 ` Cornelia Huck
2021-10-15 8:09 ` Parav Pandit
2021-10-15 9:25 ` [virtio-dev] " Cornelia Huck
2021-10-22 6:29 ` Parav Pandit
2021-10-11 16:22 ` [virtio-dev] " Cornelia Huck
2021-10-12 10:35 ` Parav Pandit
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