| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Mon, 16 May 2011 12:41:07 +0300 From: Emmanuel Grumbach <egrumbach@...il.com> To: netdev@...r.kernel.org, linux-wireless@...r.kernel.org Cc: Johannes Berg <johannes@...solutions.net>, "Guy, Wey-Yi" <wey-yi.w.guy@...el.com>, guy.cohen@...el.com Subject: several packets in a single buffer in Rx Hi, I am trying to enable a HW feature on a wireless NIC that allows the HW to put several packets in the same Rx buffer coming from the NIC. This can save interrupts and traffic on the bus. Today, the driver allocates pages in which the PCI-e device puts its data. Then we create an skb and add a fragment that points to the beginning of the page. The offset of the fragment is set to the offset of the first byte of the mac header within the buffer. There is only one packet per page / buffer. 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. I tried to look at shinfo->nr_frags but this looks more like a sgl related variable GRO doesn't seem to be related either since as far as I understood, it is relevant for packets after 802.11 to 802.3 translation. FWIW: I am talking about Intel's wireless device although I don't think this fact matters Thanks Emmanuel Grumbach egrumbach@...il.com -- 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
Powered by blists - more mailing lists