From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752595AbcGONOq (ORCPT ); Fri, 15 Jul 2016 09:14:46 -0400 Received: from mail.kernel.org ([198.145.29.136]:47528 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752524AbcGONOn (ORCPT ); Fri, 15 Jul 2016 09:14:43 -0400 Date: Fri, 15 Jul 2016 10:14:39 -0300 From: Arnaldo Carvalho de Melo To: Masami Hiramatsu Cc: Daniel Bristot de Oliveira , Linux Kernel Mailing List Subject: Re: perf probe -F with wildcards Message-ID: <20160715131439.GE3021@kernel.org> References: <20160715001641.GD3021@kernel.org> <20160715161548.c60921b5fae817a19a1a7f80@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160715161548.c60921b5fae817a19a1a7f80@kernel.org> X-Url: http://acmel.wordpress.com User-Agent: Mutt/1.6.1 (2016-04-27) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Em Fri, Jul 15, 2016 at 04:15:48PM +0900, Masami Hiramatsu escreveu: > On Thu, 14 Jul 2016 21:16:41 -0300 > Arnaldo Carvalho de Melo wrote: > > I think this worked at some point? > > [root@jouet acme]# perf probe -F | tail > > zswap_frontswap_init > > zswap_frontswap_invalidate_area > > zswap_frontswap_invalidate_page > > zswap_frontswap_load > > zswap_frontswap_store > > zswap_pool_create > > zswap_pool_current > > zswap_update_total_size > > zswap_writeback_entry > > zswap_zpool_param_set > > [root@jouet acme]# perf probe -F rt_sp* > > no symbols found in [kernel.kallsyms], maybe install a debug package? > > Failed to load symbols in kernel > It seems that 2 problems we have, > - There is no function which starts with rt_sp. Yeah, that is the problem at hand, I figured there weren't functions liek that, but the error message was tottally misleading :-) > - The error message is not good for that. > If you try perf probe -F acpi_*, you'll see a list of functions. > > > [root@jouet acme]# perf probe -F rt_sp\* > > no symbols found in [kernel.kallsyms], maybe install a debug package? > > Failed to load symbols in kernel > > So, yeah, it should check symbol loading is really failed and should be > changed as "no symbols match to given filter" etc. Right, - Arnaldo