Re: [RFC 0/2] virtio: provide a way for host to monitor critical events in the device

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


On 07/24/2012 02:28 PM, Gleb Natapov wrote:
> On Tue, Jul 24, 2012 at 02:26:33PM +0200, Sasha Levin wrote:
>> On 07/24/2012 09:44 AM, Gleb Natapov wrote:
>>> On Mon, Jul 23, 2012 at 10:32:39PM +0200, Sasha Levin wrote:
>>>> As it was discussed recently, there's currently no way for the guest to notify
>>>> the host about panics. Further more, there's no reasonable way to notify the
>>>> host of other critical events such as an OOM kill.
>>>>
>>>> This short patch series introduces a new device named virtio-notifier which
>>>> does two simple things:
>>>>
>>>>  1. Provide a simple interface for the guest to notify the host of critical
>>> To get early OOPSes virtio will have to be compiled into the kernel. If
>>> your are so keen on using virtio for this though, why not just use
>>> dedicated virtio serial channel?
>>
>> Let's separate between having log for these events and receiving notifications about them.
>>
>> For the log part, I can already run a simple serial console to dump everything somewhere. I'm more concerned about having notifications about something critical happening when the guest is already up and running.
>>
> I am talking about notifications. Run your notification protocol over
> dedicated virtio-serial channel. Logs goes to virtio-console as you've
> said.

Ah, so just add another channel into virtio-serial to pass these notifications? Good idea - I'll look into it.


--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[KVM ARM]     [KVM ia64]     [KVM ppc]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Photo]     [Yosemite News]    [Yosemite Photos]    [Linux Kernel]     [Linux SCSI]     [XFree86]

Add to Google Powered by Linux