Re: [Xen-devel] NAPI rescheduling and the delay caused by it

[Zoltan Kiss <zoltan.kiss@xxxxxxxxxx>]

On 10/12/13 01:14, Eric Dumazet wrote:
> On Mon, 2013-12-09 at 23:39 +0000, Zoltan Kiss wrote:
> > I found another suspect however: my grant mapping patches do the
> > unmapping from the NAPI instance where otherwise we receive the
> > packets from the guest. But this means we call napi_schedule from the
> > zerocopy callback, which can be run by anyone who free up that skb,
> > including an another VIF's RX thread (which actually does the transmit
> > TO the guest). I guess that might be bad.
> Same problem : napi_schedule() is meant to be used from interrupt
> context.
Indeed, avoiding napi_schedule seems to solve the issue. Thanks for the 
advices!
Zoli

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