From: Thomas Graf <tgraf@suug.ch>
To: "David S. Miller" <davem@davemloft.net>
Cc: netdev@oss.sgi.com
Subject: Re: [PATCH] NETLINK: Use SKB_MAXORDER to calculate NLMSG_GOODSIZE
Date: Sun, 6 Feb 2005 19:54:17 +0100 [thread overview]
Message-ID: <20050206185417.GU31837@postel.suug.ch> (raw)
In-Reply-To: <20050128230327.GV31837@postel.suug.ch>
> NLMSG_GOODSIZE specifies a good default size for the skb tailroom
> used in netlink messages when the size is unknown at the time of
> the allocation.
>
> The current value doesn't make much sense anymore because
> skb_shared_info isn't taken into account which means that
> depending on the architecture NLMSG_GOOSIZE can exceed PAGE_SIZE
> resulting in a waste of almost a complete page.
>
> Using SKB_MAXORDER solves this potential leak at the cost of
> slightly smaller but safer sizes for some architectures.
>
> Signed-off-by: Thomas Graf <tgraf@suug.ch>
Dave, did you get this one?
next prev parent reply other threads:[~2005-02-06 18:54 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-28 23:03 [PATCH] NETLINK: Use SKB_MAXORDER to calculate NLMSG_GOODSIZE Thomas Graf
2005-01-28 23:22 ` Herbert Xu
2005-01-28 23:40 ` Thomas Graf
2005-02-07 6:27 ` David S. Miller
2005-01-28 23:48 ` Alexey Kuznetsov
2005-01-29 0:21 ` Thomas Graf
2005-01-29 0:27 ` Thomas Graf
2005-02-07 6:32 ` David S. Miller
2005-02-07 13:28 ` Thomas Graf
2005-02-07 14:27 ` [PATCH] NET: Fix calculation for collapsed skb size Thomas Graf
2005-02-09 4:54 ` David S. Miller
2005-01-29 18:40 ` [PATCH] NETLINK: Use SKB_MAXORDER to calculate NLMSG_GOODSIZE Alexey Kuznetsov
2005-01-29 12:47 ` Thomas Graf
2005-02-06 18:54 ` Thomas Graf [this message]
2005-02-06 21:08 ` David S. Miller
2005-02-07 6:25 ` David S. Miller
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