Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752735Ab3EMKCH (ORCPT ); Mon, 13 May 2013 06:02:07 -0400 Received: from gate.crashing.org ([63.228.1.57]:53377 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751022Ab3EMKCF (ORCPT ); Mon, 13 May 2013 06:02:05 -0400 Message-ID: <1368439305.19924.38.camel@pasglop> Subject: Re: [RFC PATCH v3 2/5] powerpc: Exception hooks for context tracking subsystem From: Benjamin Herrenschmidt To: Li Zhong Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, paulmck@linux.vnet.ibm.com, fweisbec@gmail.com, paulus@samba.org, michael@ellerman.id.au Date: Mon, 13 May 2013 20:01:45 +1000 In-Reply-To: <1368438380.2618.52.camel@ThinkPad-T5421> References: <1368422493-9831-1-git-send-email-zhong@linux.vnet.ibm.com> <1368422493-9831-3-git-send-email-zhong@linux.vnet.ibm.com> <1368424667.19924.26.camel@pasglop> <1368434680.2618.33.camel@ThinkPad-T5421> <1368435991.19924.35.camel@pasglop> <1368438380.2618.52.camel@ThinkPad-T5421> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.6.4-0ubuntu1 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 Content-Length: 651 Lines: 19 On Mon, 2013-05-13 at 17:46 +0800, Li Zhong wrote: > > hash_page() won't start a new RCU, at least not in its current incarnation, > > the only thing I can see it ever doing would be to take some RCU read locks one > > day (it doesn't today). > > Seems I added the hooks because of the trace point of hcall > entry/exit ... Oh I see, and trace points use RCU ... ok, leave it there then. Cheers, Ben. -- 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/