lkml.org 
[lkml]   [2013]   [Feb]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH, RFC 2/8] ARM: twd: register clock event for 1 core SMP
On Tue, Feb 19, 2013 at 03:44:14PM +0530, Santosh Shilimkar wrote:
> On Monday 18 February 2013 05:07 PM, Afzal Mohammed wrote:
> >Register percpu local timer for scheduler tick in the case of one core
> >SMP configuration. In other cases - secondary cpu's as well as boot
> >cpu's having more than one core, this is being registered as per
> >existing boot flow, with a difference that they happens after delay
> >calibration. Registering the clock for tick in case of one core should
> >be done before Kernel calibrates delay (this is required to boot,
> >unless local timer is the only one registered for tick). Registering
> >twd local timer at init_time (which platforms are doing now) helps
> >achieve that with the proposed change.
> >
> >This helps in an almost booting Kernel (minimal) by only relying on
> >ARM parts for an A9 one core SMP.
> >
> >Signed-off-by: Afzal Mohammed <afzal@ti.com>
> >---
> As mentioned in cover-letter, I don't think we have good
> reasoning to make TWD to work with UP configuration. Even
> you fix the timer code, there are more cascaded dependencies
> which is not worth the effort.

if CONFIG_SMP_ON_UP is enabled, smp_twd.c can still be compiled, right ?

--
balbi
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2013-02-19 13:42    [W:0.069 / U:0.128 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site