From: "David S. Miller" <davem@davemloft.net>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: netdev@oss.sgi.com
Subject: Re: netdev ioctl & dev_base_lock : bad idea ?
Date: Wed, 8 Dec 2004 22:06:42 -0800 [thread overview]
Message-ID: <20041208220642.6984519f.davem@davemloft.net> (raw)
In-Reply-To: <1101458929.28048.9.camel@gaston>
On Fri, 26 Nov 2004 19:48:49 +1100
Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
> I suppose there is a good reason we can't just use the rtnl_sem for
> these guys, though why isn't dev_base_lock a read/write semaphore
> instead of a spinlock ? At least on ppc, I don't think there's any
> overhead in the normal path, and this is not on a very critical path
> anyway, is it ?
It can't be a semphore because it is taken in packet processing,
and thus softint handling, paths.
next prev parent reply other threads:[~2004-12-09 6:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-26 8:48 netdev ioctl & dev_base_lock : bad idea ? Benjamin Herrenschmidt
2004-12-09 6:06 ` David S. Miller [this message]
2004-12-09 6:22 ` Benjamin Herrenschmidt
2004-12-09 7:13 ` David S. Miller
2004-12-09 22:14 ` Benjamin Herrenschmidt
2004-12-09 23:19 ` David S. Miller
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