Messages in this thread | | | Subject | Re: [RFC PATCH 1/5] net: implement support for low latency socket polling | From | Eric Dumazet <> | Date | Mon, 04 Mar 2013 08:15:59 -0800 |
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On Mon, 2013-03-04 at 17:28 +0200, Eliezer Tamir wrote: > On 04/03/2013 16:52, Eric Dumazet wrote: > > On Mon, 2013-03-04 at 10:43 +0200, Eliezer Tamir wrote: > > > >> One could for example increment the generation id every time the RTNL is > >> taken. or is this too much? > > > > RTNL is taken for a lot of operations, it would be better to have a > > finer grained increment. > > If is taken rarely enough it will still be worth it. >
Yes, but eventually it makes attempts to get rid of RTNL a nightmare.
When adding new network features, just use the right semantic from the beginning.
> Otherwise it may be hard to know what operations need to invalidate the > napi reference. It can very well be HW dependent, and then you end up > adding a function for drivers to call to do the invalidation. > > Or we can decide that we only care about catastrophic events and only > worry about a napi completely going away and not worry about > configuration changes.(Polling the wrong queue will not kill you, it's > just a waste of perfectly good CPU cycles.)
As long as the incoming packets are able to update the information, who cares if one packet missed the poll ?
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