From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753598Ab2HNOax (ORCPT ); Tue, 14 Aug 2012 10:30:53 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:25895 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752086Ab2HNOav (ORCPT ); Tue, 14 Aug 2012 10:30:51 -0400 X-Authority-Analysis: v=2.0 cv=IOWA+3TG c=1 sm=0 a=s5Htg7xnQOKvHEu9STBOug==:17 a=OpT9cpI26MMA:10 a=dF28KBnHEbwA:10 a=5SG0PmZfjMsA:10 a=Q9fys5e9bTEA:10 a=meVymXHHAAAA:8 a=ayC55rCoAAAA:8 a=nhe7_gQCEjgajjuE_twA:9 a=PUjeQqilurYA:10 a=s5Htg7xnQOKvHEu9STBOug==:117 X-Cloudmark-Score: 0 X-Originating-IP: 72.230.195.127 Message-ID: <1344954649.6724.13.camel@gandalf.stny.rr.com> Subject: Using random in interrupts for RT From: Steven Rostedt To: Thomas Gleixner Cc: LKML , Ben Hutchings , RT Date: Tue, 14 Aug 2012 10:30:49 -0400 Content-Type: text/plain; charset="ISO-8859-15" X-Mailer: Evolution 3.4.3-1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Thomas, Ben Hutchings asked me if we still need "genirq: Disable random call on preempt-rt" for -rt? With commit 902c098a366 "random: use lockless techniques in the interrupt path" there is no more locks used. But does it still produce high latencies? -- Steve