From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter LaDow Subject: Interrupt Bottom Half Scheduling Date: Mon, 14 Feb 2011 14:31:43 -0800 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 To: linux-rt-users@vger.kernel.org Return-path: Received: from mail-yx0-f174.google.com ([209.85.213.174]:37058 "EHLO mail-yx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750948Ab1BNWbo (ORCPT ); Mon, 14 Feb 2011 17:31:44 -0500 Received: by yxt3 with SMTP id 3so2284898yxt.19 for ; Mon, 14 Feb 2011 14:31:43 -0800 (PST) Sender: linux-rt-users-owner@vger.kernel.org List-ID: How is the scheduling of the hrtimers softirq thread handled? When querying the RT priority of the hrtimer softirq, I get a priority of 50. But when running a priority 99 thread, we still seem to be getting interrupted. Shouldn't the hrtimer softirq be put off until the CPU is idle or a lower priority task is running? Thanks, Pete