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Date: Mon, 16 May 2011 16:36:45 +0300 From: Emmanuel Grumbach <egrumbach@...il.com> To: Michał Mirosław <mirqus@...il.com> Cc: netdev@...r.kernel.org, linux-wireless@...r.kernel.org, Johannes Berg <johannes@...solutions.net>, "Guy, Wey-Yi" <wey-yi.w.guy@...el.com>, guy.cohen@...el.com Subject: Re: several packets in a single buffer in Rx 2011/5/16 Michał Mirosław <mirqus@...il.com>: > W dniu 16 maja 2011 14:59 użytkownik Emmanuel Grumbach > <egrumbach@...il.com> napisał: >> 2011/5/16 Michał Mirosław <mirqus@...il.com>: >>> 2011/5/16 Emmanuel Grumbach <egrumbach@...il.com>: >>>> I would like to be able to deliver the same page several times to the >>>> stack without having the stack consume it before the last time I >>>> deliver it. >>>> Of course I would like to avoid cloning it. >>> >>> Just do get_page() on the page having another packet in it before >>> passing skb up. >>> >> >> I can see the path: >> __kfree_skb -> skb_release_all -> skb_release_data -> put_page >> put_page will free the page iff the _count variable reaches 0. Of course, >> _count is incremented by get_page. >> >> I will give it try. >> >> I understand that this will work regardless the order given to >> alloc_pages right ? > > Yes. Remember that if you put a lot of packets in a big-order page > then the memory will be freed only after all packets are freed. Sure. Thanks for the help. > > Best Regards, > Michał Mirosław > -- 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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