From: David Miller <davem@davemloft.net>
To: eyal.birger@gmail.com
Cc: willemb@google.com, edumazet@google.com,
shmulik.ladkani@gmail.com, linux-bluetooth@vger.kernel.org,
marcel@holtmann.org, netdev@vger.kernel.org
Subject: Re: [PATCH net-next v2 4/7] net: packet: use skb->dev as storage for skb orig len instead of skb->cb[]
Date: Sat, 28 Feb 2015 14:21:35 -0500 (EST) [thread overview]
Message-ID: <20150228.142135.470339626705046722.davem@davemloft.net> (raw)
In-Reply-To: <1424977624-649-5-git-send-email-eyal.birger@gmail.com>
From: Eyal Birger <eyal.birger@gmail.com>
Date: Thu, 26 Feb 2015 21:07:01 +0200
> As part of an effort to move skb->dropcount to skb->cb[], 4 bytes
> of additional room are needed in skb->cb[] in packet sockets.
>
> Store the skb original length in skb->dev instead of skb->cb[] for
> this purpose.
>
> Signed-off-by: Eyal Birger <eyal.birger@gmail.com>
I'm a little confused, why is this even needed?
packet_skb_cb is 24 bytes by my calculations, which is much
smaller than the cb[] size which is 48 bytes.
next prev parent reply other threads:[~2015-02-28 19:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-26 19:06 [PATCH net-next v2 0/7] net: move skb->dropcount to skb->cb[] Eyal Birger
2015-02-26 19:06 ` [PATCH net-next v2 1/7] net: bluetooth: compact struct bt_skb_cb by inlining struct hci_req_ctrl Eyal Birger
2015-02-26 19:06 ` [PATCH net-next v2 2/7] net: bluetooth: compact struct bt_skb_cb by converting boolean fields to bit fields Eyal Birger
2015-02-26 19:07 ` [PATCH net-next v2 3/7] net: rxrpc: change call to sock_recv_ts_and_drops() on rxrpc recvmsg to sock_recv_timestamp() Eyal Birger
2015-02-26 19:07 ` [PATCH net-next v2 5/7] net: use common macro for assering skb->cb[] available size in protocol families Eyal Birger
[not found] ` <1424977624-649-1-git-send-email-eyal.birger-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-02-26 19:07 ` [PATCH net-next v2 4/7] net: packet: use skb->dev as storage for skb orig len instead of skb->cb[] Eyal Birger
2015-02-28 19:21 ` David Miller [this message]
[not found] ` <20150228.142135.470339626705046722.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2015-02-28 19:39 ` Eyal Birger
2015-02-28 20:08 ` David Miller
[not found] ` <20150228.150830.1726900309943339124.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2015-02-28 20:38 ` Eyal Birger
2015-02-28 21:00 ` David Miller
2015-03-01 5:09 ` Eyal Birger
[not found] ` <CAHsH6Gv8Dh3RQ0V7KURcca9bzZGY0FwiqGj-mP9oKA_Vv72nUA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-03-01 5:31 ` David Miller
[not found] ` <20150301.003143.1281961486875434872.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2015-03-01 5:35 ` Eyal Birger
2015-02-26 19:07 ` [PATCH net-next v2 6/7] net: add common accessor for setting dropcount on packets Eyal Birger
2015-02-26 19:07 ` [PATCH net-next v2 7/7] net: move skb->dropcount to skb->cb[] Eyal Birger
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