[OpenWrt-Devel] [PATCH] oxnas: set irq of usb&sata to cpu1

[Daniel Golle]

Hi!

This was committed in r47618 though it is buggy (see below) and not
clear whether manually setting irq-affinity is at all feasible.
Please revert.

Cheers

Daniel

On Mon, Nov 23, 2015 at 04:24:02PM +0100, Daniel Golle wrote:
> On Mon, Nov 23, 2015 at 02:30:34PM +0800, Shonn Lu wrote:
> > Signed-off-by: Shonn Lu <countrysideboy at qq.com>
> > ---
> >  .../linux/oxnas/base-files/init.d/set-irq-affinity | 22 ++++++++++++++++++++++
> >  1 file changed, 22 insertions(+)
> >  create mode 100755 target/linux/oxnas/base-files/init.d/set-irq-affinity
> > 
> > diff --git a/target/linux/oxnas/base-files/init.d/set-irq-affinity b/target/linux/oxnas/base-files/init.d/set-irq-affinity
> > new file mode 100755
> > index 0000000..8ab066f
> > --- /dev/null
> > +++ b/target/linux/oxnas/base-files/init.d/set-irq-affinity
> > @@ -0,0 +1,22 @@
> > +#!/bin/sh /etc/rc.common
> > +
> > +START=99
> > +
> > +get_irq() {
> > +	local name="$1"
> > +	grep -m 1 "$name" /proc/interrupts | cut -d: -f1 | sed 's, *,,'
> > +}
> > +
> > +set_irq_affinity() {
> > +	local name="$1"
> > +	local val="$2"
> > +	local irq="$(get_irq "$name")"
> > +	[ -n "$irq" ] || return
> > +	echo "$val" > "/proc/irq/$irq/smp_affinity"
> > +}
> > +
> > +start() {
> > +	set_irq_affinity ehci_hcd 2
> > +	set_irq_affinity xhci_hcd 2
> > +	set_irq_affinity sata 2
> > +}
> 
> I'm sorry to be such a pain, however, now that I have a closer look I
> realize that naming is 'ehci_hcd' but 'xhci-hcd' (note: '-' vs. '_')
> Maybe
> 
> 	set_irq_affinity ehci 2
> 	set_irq_affinity xhci 2
> 
> is the safest for now and allows for kernel's driver naming to
> eventually get unified in the future...
> 
> 
> Cheers
> 
> 
> Daniel
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