From: Johannes Berg <johannes-cdvu00un1VgdHxzADdlk8Q@public.gmane.org>
To: netdev <netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Cc: "David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
Herbert Xu
<herbert-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>,
linux-wireless
<linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: S/G operation, skb checksums, data copying
Date: Sun, 04 May 2008 20:58:03 +0200 [thread overview]
Message-ID: <1209927483.3655.23.camel@johannes.berg> (raw)
In-Reply-To: <1209925725.3655.15.camel-YfaajirXv214zXjbi5bjpg@public.gmane.org> (sfid-20080504_202821_526459_C1C8EB56)
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> However, mac80211 needs to change the skb header before the skb is
> handed to the hardware. Often enough, the skb it will get is cloned, so
> it has to copy the header. Hence, it would benefit from having the
> actual skb data not be in the header, but that is unavoidable currently
> since we have no checksum features.
I just realised that this wouldn't happen since the extra data is
actually in a struct page *, so never mind.
johannes
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next prev parent reply other threads:[~2008-05-04 18:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-04 18:28 S/G operation, skb checksums, data copying Johannes Berg
[not found] ` <1209925725.3655.15.camel-YfaajirXv214zXjbi5bjpg@public.gmane.org>
2008-05-04 18:58 ` Johannes Berg [this message]
2008-05-04 22:50 ` David Miller
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