Re: [Xen-users] Re: process limit

To:	Charles Duffy <cduffy@xxxxxxxxxxx>
Subject:	Re: [Xen-users] Re: process limit
From:	Anand <xen.mails@xxxxxxxxx>
Date:	Sat, 7 Jan 2006 13:58:32 +0530
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On 1/7/06, Charles Duffy <cduffy@xxxxxxxxxxx> wrote:

Anand wrote:
> Yes it makes sense, however i was wondering if something like this is
> possible or not. Lets say a heavy disk io process goes wild and keeps
> on writing to disk and span multiple processes, the dom0 can come to a
> grinding halt. (for that matter there is no way to do disk io
> scheduling like cpu scheduling :( )

IIRC, disk I/O scheduling is a TODO for Xen and should be supported in
the future.

Yes i read that on the roadmap page.

That said, have you actually seen this case (where the Dom0 comes to a
complete halt, I/O blocked on account of disk usage by the DomUs)?

Not under Xen, but under uml yes. The host almost died because of the disk io and processes from a uml running on it.

--

regards,

Anand

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Re: [Xen-users] Re: process limit