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Date: Mon, 10 Sep 2007 17:27:33 -0700 From: "Kok, Auke" <sofar@...-projects.org> To: "Kok, Auke" <auke-jan.h.kok@...el.com> CC: "David S. Miller" <davem@...emloft.net>, Stephen Hemminger <shemminger@...l.org>, "Waskiewicz Jr, Peter P" <peter.p.waskiewicz.jr@...el.com>, Jesse Brandeburg <jesse.brandeburg@...el.com>, NetDev <netdev@...r.kernel.org> Subject: Re: New NAPI API: Need for netif_napi_remove() ?! Kok, Auke wrote: > David, > > From an old thread: > > > 5) Since, in the NETPOLL case, netif_napi_init() adds the NAPI struct > > to the per-device list I renamed it to netif_napi_add(). Currently > > no teardown is really necessary, anything that would need to be done > > would be driver internal, so I didn't create the corollary > > netif_napi_remove() for the time being. Let's not add it unless it > > really becomes necessary. > > while coding the NAPI API changes into the ixgbe driver, I notice that I'm in > need for an implementation for netif_napi_remove(). The ixgbe driver itself > already modifies it's polling routing on open() and close() based on whether it > was able to acquire MSI-X vectors or not, and can thus logically change as the > system suspends/resumes and new hardware is inserted that change the balance in > the MSI-X vectors in the system. Or, even more bluntly, all MSI support is > disabled and we want the driver to come up in legacy mode and use a completely > different poll routine alltogether. We can't do this at probe time. > > In any case I think we have a legitimate case for netif_napi_remove() to be > implemented. hm, I spoke too soon, I think I can get by for now by just modifying adapter->napi.poll when needed, and this would be clean enough for now. This might change as I enable multiqueue in this driver later though. Auke - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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