Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753217AbaKHAEQ (ORCPT ); Fri, 7 Nov 2014 19:04:16 -0500 Received: from cdptpa-outbound-snat.email.rr.com ([107.14.166.226]:52979 "EHLO cdptpa-oedge-vip.email.rr.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752256AbaKHAEP (ORCPT ); Fri, 7 Nov 2014 19:04:15 -0500 Date: Fri, 7 Nov 2014 19:04:13 -0500 From: Steven Rostedt To: Rabin Vincent Cc: Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] tracing: don't busy wait in buffer splice Message-ID: <20141107190413.28a2ae84@gandalf.local.home> In-Reply-To: <20141107132106.0c318068@gandalf.local.home> References: <1415309167-2373-1-git-send-email-rabin@rab.in> <20141107132106.0c318068@gandalf.local.home> X-Mailer: Claws Mail 3.10.1 (GTK+ 2.24.25; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-RR-Connecting-IP: 107.14.168.142:25 X-Cloudmark-Score: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 7 Nov 2014 13:21:06 -0500 Steven Rostedt wrote: > This also needs to be marked for stable. I'll start looking at how far > this goes back. I'm thinking it may go back as far as the splice code > was created. Actually, it is broken back to 3.16. 3.15 and before was safe because it was still using the mockup poll_wait_pipe() that would wake up every 1/10 of a second to see if something was in the buffer. See commit: b1169cc69ba9 "tracing: Remove mock up poll wait function" -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/