[PATCH] mi: if we fail to process 100 input events due to a stuck EQ, terminate.

[Stephane Marchesin]

On Mon, Apr 20, 2009 at 14:53, Matthias Hopf <mhopf at suse.de> wrote:
> On Apr 20, 09 15:40:47 +1000, Daniel Stone wrote:
>
> It still opens up the can of worms labeled "Denial of Service".
> Though one could argue that a graphics operation using 15secs is in
> itself a possible denial of service...
>

Actually, 15 seconds is not that far fetched. On radeon, I used to
trigger the DRM counterparts of such a timeout quite regularly when
doing heavy rendering on a PCI radeon 7000 (even though I increased it
to 10 seconds instead of the default 3). Similarly, GPGPU processing
can and will stall for multiple seconds. Specific drivers having the
problem is a separate issue, but it would be really great if we don't
spread it to the whole server.

But really, the question is: what real issue are you fixing with this timeout?

Stephane