From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934102AbbCROVr (ORCPT ); Wed, 18 Mar 2015 10:21:47 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:35324 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934056AbbCROVW (ORCPT ); Wed, 18 Mar 2015 10:21:22 -0400 Date: Wed, 18 Mar 2015 07:21:14 -0700 From: Christoph Hellwig To: Peter Zijlstra Cc: mingo@kernel.org, rusty@rustcorp.com.au, mathieu.desnoyers@efficios.com, oleg@redhat.com, paulmck@linux.vnet.ibm.com, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, andi@firstfloor.org, rostedt@goodmis.org, tglx@linutronix.de Subject: Re: [PATCH 0/8] latched RB-trees and __module_address() Message-ID: <20150318142114.GA22761@infradead.org> References: <20150318133626.526984618@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150318133626.526984618@infradead.org> User-Agent: Mutt/1.5.23 (2014-03-12) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 18, 2015 at 02:36:26PM +0100, Peter Zijlstra wrote: > This series is aimed at making __module_address() go fast(er). What users do hit this so hard that it matters? Seems like the jump label code uses it directly and throgh __module_text_address, and krobes use it throug __module_text_address. Is it the pageattr code or lockdep? Also seems interesting that both __module_address and __module_text_address are exported, but don't seem to have modular users.