Re: [PATCH 03/03] sata_mv implement IRQ coalescing

[Mark Lord <liml@rtr.ca>]

Mark Lord wrote:
> Add IRQ coalescing to sata_mv (off by default).
> 
> This feature can reduce total interrupt overhead for RAID setups
> in some situations, by deferring the interrupt signal until one or both of:
> 
> a) a specified io_count (completed SATA commands) is achieved, or
> b) a specified time interval elapses after an IO completion.
> 
> For now, module parameters are used to set the irq_coalescing_io_count
> and irq_coalescing_usecs (timeout) globally.  These may eventually
> be supplemented with sysfs attributes, so that thresholds can be set
> on-the-fly and on a per-chip (or even per-host_controller) basis.
> 
> Signed-off-by: Mark Lord <mlord@pobox.com>
> ---
> 
> This is for #upstream libata-dev #upstream
> 
> --- old/drivers/ata/sata_mv.c    2009-03-10 18:28:30.000000000 -0400
> +++ new/drivers/ata/sata_mv.c    2009-03-10 18:48:07.000000000 -0400
> @@ -34,10 +34,7 @@
..

Ooops.. hold off on 03/03 for the moment.
I messed up a couple of bits.. will repost (v2) shortly.

-ml