[openib-general] Re: LLTX and netif_stop_queue

[Stephen Hemminger]

On Wed, 19 Jan 2005 19:02:52 -0500
Jeff Garzik <jgarzik at pobox.com> wrote:

> David S. Miller wrote:
> > Usually we strive for BH disabling locks in order to decrease the
> > amount of hard IRQ disabling time in the kernel.  But here, as soon
> > as we call into ->hard_start_xmit(), the driver typically turns hard
> > IRQs off anyways.
> [...]
> > Also, changing dev->xmit_lock to be IRQ disabling is not %100 trivial.
> 
> 
> Agreed on both counts...

But in the end it would be safer than the current LLTX usage in drivers
which seems like it opening up problems.


-- 
Stephen Hemminger	<shemminger at osdl.org>