netdev - Re: [PATCH][SOCK]: shrink struct sock

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Message-ID: <463ACE47.6080807@cosmosbay.com>
Date:	Fri, 04 May 2007 08:10:15 +0200
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH][SOCK]: shrink struct sock

Arnaldo Carvalho de Melo a écrit :
> 
> [acme@...a linux-2.6]$ pahole -C sk_buff_head net/core/sock.o
> struct sk_buff_head {
> 	struct sk_buff *           next;                 /*     0     8 */
> 	struct sk_buff *           prev;                 /*     8     8 */
> 	__u32                      qlen;                 /*    16     4 */
> 	spinlock_t                 lock;                 /*    20     8 */
> }; /* size: 32, cachelines: 1 */
>    /* padding: 4 */
>    /* last cacheline: 32 bytes */


Hum, maybe not enough tea this morning, but I always thought spinlock_t size 
was 4 bytes....

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