From: "Sjur Brændeland" <sjurbren@gmail.com>
To: Ohad Ben-Cohen <ohad@wizery.com>, Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
Amit Shah <amit.shah@redhat.com>,
linux-kernel@vger.kernel.org,
Linus Walleij <linus.walleij@linaro.org>,
virtualization@lists.linux-foundation.org
Subject: Re: [RFC 1/2] virtio_console: Add support for DMA memory allocation
Date: Fri, 7 Sep 2012 10:35:50 +0200 [thread overview]
Message-ID: <CAJK669avB+nsq6YrvKwODSSz=5NzFP5JdM41qkHz9k5ZOVyc2w@mail.gmail.com> (raw)
In-Reply-To: <87k3w7j49i.fsf@rustcorp.com.au>
Hi Ohad,
>> A simplest thing to do is change dev id. rusty?
>
> For generic usage, this is correct. But my opinion is that fallback on
> feature non-ack is quality-of-implementation issue: great to have, but
> there are cases where you just want to fail with "you're too old".
>
> And in this case, an old system simply will never work. So it's a
> question of how graceful the failure is.
>
> Can your userspace loader can refuse to proceed if the driver doesn't
> ack the bits? If so, it's simpler than a whole new ID.
Ohad: Are there any way we could avoid starting up the remote processor
if mandatory virtio features (such as DMA memory) are not supported by
the virtio-driver?
Regards,
Sjur
next prev parent reply other threads:[~2012-09-07 8:35 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-03 13:51 [RFC 1/2] virtio_console: Add support for DMA memory allocation sjur.brandeland
2012-09-03 13:51 ` [RFC 2/2] virtio_console: Add feature to disable console port sjur.brandeland
2012-09-03 14:30 ` [RFC 1/2] virtio_console: Add support for DMA memory allocation Michael S. Tsirkin
2012-09-03 14:57 ` Sjur Brændeland
2012-09-03 20:27 ` Michael S. Tsirkin
2012-09-04 6:07 ` Rusty Russell
2012-09-05 13:00 ` Sjur Brændeland
2012-09-05 14:35 ` Michael S. Tsirkin
2012-09-05 18:15 ` Sjur Brændeland
2012-09-05 19:16 ` Michael S. Tsirkin
2012-09-07 9:24 ` Sjur Brændeland
2012-09-04 11:28 ` Sjur Brændeland
2012-09-04 13:50 ` Michael S. Tsirkin
2012-09-04 16:58 ` Sjur Brændeland
2012-09-04 18:55 ` Michael S. Tsirkin
2012-09-06 2:04 ` Rusty Russell
2012-09-06 5:27 ` Michael S. Tsirkin
2012-09-10 22:11 ` Michael S. Tsirkin
2012-09-12 6:24 ` Rusty Russell
2012-09-07 8:35 ` Sjur Brændeland [this message]
2012-09-16 9:44 ` [PATCH repost] virtio: don't crash when device is buggy Michael S. Tsirkin
2012-09-17 4:27 ` Rusty Russell
2012-09-18 22:24 ` Michael S. Tsirkin
2012-09-19 4:10 ` Rusty Russell
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