[openib-general] Re: [PATCH]: was Re: LLTX and netif_stop_queue
Andi Kleen
ak at suse.de
Wed Jan 19 19:14:23 PST 2005
On Wed, Jan 19, 2005 at 04:46:40PM -0800, David S. Miller wrote:
> Ok, here is what something like this might look like.
>
> In summary:
>
> 1) dev->xmit_lock is now IRQ disabling instead of BH disabling
> 2) Drivers can use dev->xmit_lock in place of their private
> driver_priv->tx_lock and this is effectively the same gain
> LLTX gave drivers sans the race condition which started this
> thread.
> 3) NETDEV_TX_LOCKED is gone
> 4) LLTX stays, but this means that the driver's TX routine is
> %100 lockless. It is only to be used by loopback and other
> queueless software devices such as tunnels.
Looks good to me and much cleaner than what I initially did.
Thanks.
-Andi
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