netdev - Re: OMAP4430 SDP with KS8851: very slow networking

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Date:   Fri, 7 Dec 2018 12:55:33 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     netdev@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Grygorii Strashko <grygorii.strashko@...com>
Subject: Re: OMAP4430 SDP with KS8851: very slow networking

* Russell King - ARM Linux <linux@...linux.org.uk> [181207 19:27]:
> You mentioned that edge mode didn't work as well as level mode on
> duovero smsc controller, I think this may help to solve the same
> issue but for edge IRQs - we need a mask_ack_irq function to avoid
> acking while the edge interrupt is masked.  Let me know if that
> lowers the smsc ping latency while in edge mode.

Looks like smsc edge interrupt is still producing varying
ping latencies with this. Seems like the mas_ack_irq is
a nice improvment though.

Regards,

Tony