Re: [PATCH v3 09/11] i2c: rcar: revoke START request early

Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx> · Sat, 2 Apr 2016 02:05:40 +0300

On 04/01/2016 11:14 PM, Wolfram Sang wrote:

IIRC my tests showed that if you don't remove
the spinlocks (patch 4), the interrupt latency will already be too high
again.

    Thank you for the valuable info!

Oh, and add patch 6 to it. The context switches are a major problem in
this.

   Thanks again! I ended up backporting all the patches up to #9. Not sure 
it'd be acceptable for the -stable kernels since there's a lot of refactors 
involved...

MBR, Sergei