From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johannes Berg Subject: Re: S/G operation, skb checksums, data copying Date: Sun, 04 May 2008 20:58:03 +0200 Message-ID: <1209927483.3655.23.camel@johannes.berg> References: <1209925725.3655.15.camel@johannes.berg> (sfid-20080504_202821_526459_C1C8EB56) Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-UKKlIBWuvwW8SBs5Equa" Cc: "David S. Miller" , Herbert Xu , linux-wireless To: netdev Return-path: In-Reply-To: <1209925725.3655.15.camel-YfaajirXv214zXjbi5bjpg@public.gmane.org> (sfid-20080504_202821_526459_C1C8EB56) Sender: linux-wireless-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org --=-UKKlIBWuvwW8SBs5Equa Content-Type: text/plain Content-Transfer-Encoding: quoted-printable > 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 --=-UKKlIBWuvwW8SBs5Equa Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Comment: Johannes Berg (powerbook) iQIVAwUASB4HOqVg1VMiehFYAQKGoQ//SDoLYkJv6vAIOVoythT9++2WMuCwrYjd SIT3NBjq89oWbbSFyG/0LlgzTYH1U365aoX2zSOY+GL4KrT3njI4LSYTSZWaPvyg J2hrX5IuI1iwmX5OAPyoMNy78LE2TOy2N4XAFkkraIXik1bKEj4eoVkXsI8tgtaX uQvistl487tKt2bMbeWpWLQHItflaUJs81ANaEo/NAC/qHurxbJZ8xzDhSsWYQgc tuKfvzrQNqkGYJAHnGSata1OfubaYPdnr9jHUbtyvzVvWPtAxPdOEXPIrvDOx0Hi UkJZswW3xe50Po/UALimkOY8lyG6rGB7ILIhEYcOa8hh8xMEt62eP9vxMjgiaJkt MxP/VV3GK1XNWH9VamwRfcVAnwpAfeeKpoCCPSus5bQglTnibyD3KekTx/XuV+zQ VXxfURv5lzQET/5t/uNjm0glc4CiJ1OFdGihD8OuN8Lt1k3YTW1YN2Xh5gb55HhA ATxl2/7Du6xCYECdOduZYW3ssx2EdtonuBD29pNd7T6TY3nxayf3sA/lX+gusSc6 tYf1jeTxDHhNEMxSB4Vt4KIxdDJPv/nLwqZViOSzaQjgZ9w0vZcmLpt6llvKbwKw OQs3VhsPgTGVktoz1DkinP9Tn7tVy7NorpSmEi1+aqKzJzm+rvj14O8MREZV87yr uxbx1ayinp8= =G7QG -----END PGP SIGNATURE----- --=-UKKlIBWuvwW8SBs5Equa-- -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html