On Wed, Jun 23, 2010 at 06:05:41PM +0800, Dong, Eddie wrote: > > I mean once the frontend side driver post the buffers to the backend driver, > the backend driver will "immediately" use that buffers to compose skb or > gro_frags and post them to the assigned host NIC driver as receive buffers. > In that case, if the backend driver recieves a packet from the NIC that > requires to do copy, it may be unable to find additional free guest buffer > because all of them are already used by the NIC driver. We have to reserve > some guest buffers for the possible copy even if the buffer address is not > identified by original skb :(
OK I see what you mean. Can you tell me how does Xiaohui's previous patch-set deal with this problem? Thanks, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <herb...@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
