Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753670Ab2HCWIF (ORCPT ); Fri, 3 Aug 2012 18:08:05 -0400 Received: from na3sys009aog131.obsmtp.com ([74.125.149.247]:32885 "EHLO na3sys009aog131.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753110Ab2HCWIA (ORCPT ); Fri, 3 Aug 2012 18:08:00 -0400 MIME-Version: 1.0 In-Reply-To: <20120803215954.GA4489@kroah.com> References: <1344013004-32211-1-git-send-email-vikram.pandita@ti.com> <20120803200822.GC731@harshnoise.musicnaut.iki.fi> <20120803215954.GA4489@kroah.com> From: "Pandita, Vikram" Date: Fri, 3 Aug 2012 15:07:39 -0700 Message-ID: Subject: Re: [PATCH v3] printk: add option to print cpu id To: Greg KH Cc: Aaro Koskinen , Andi Kleen , kay@vrfy.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Mike Turquette , Vimarsh Zutshi Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2046 Lines: 54 On Fri, Aug 3, 2012 at 2:59 PM, Greg KH wrote: > On Fri, Aug 03, 2012 at 02:24:20PM -0700, Pandita, Vikram wrote: >> Aaro >> >> On Fri, Aug 3, 2012 at 1:08 PM, Aaro Koskinen wrote: >> > Hi, >> > >> > On Fri, Aug 03, 2012 at 11:25:37AM -0700, Pandita, Vikram wrote: >> >> > And really: Wasting 1/3 of the 80 character line is too much. >> >> >> >> You _WASTE_ 4 chars only if you are interested in this info by >> >> enabling: CONFIG_PRINTK_CPUID >> > >> > I guess you waste 4 + 3 chars? You could optimize the length by checking >> > CONFIG_NR_CPUS? >> >> Good point. >> Looks there is a variable 'nr_cpu_ids' that could be used as well. >> >> If there is general consensus that the patch can help the arm >> community, and others in general, >> this optimization should be easy to implement - saving few chars space >> in each line of console output. >> >> For now i will stick to this v3 version of path, unless you think otherwise. > > I don't think is is something that anyone needs, and if you do, as > pointed out, you can use the trace function to make it happen. > This was something that got used internally and helped at times. This attempt to give back to community, but i understand the rationale to go with larger consensus. At least the patch is out there in public for anyone to make use of. > Adding features are not "free", someone has to maintain them and all of > the other work involved with it. So don't just think that because it is > hidden behind a config option, that it doesn't affect people. At least the v3 patch is a complete working implementation wrt kernel/printk.c file as it exists on linus tree master today. Understand long term this does have maintenance overhead just like printk_time does. > > greg k-h -- 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/