From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id A4940DDE03 for ; Thu, 2 Aug 2007 18:58:25 +1000 (EST) Subject: Re: [PATCH] fixes for the SLB shadow buffer From: Benjamin Herrenschmidt To: Michael Neuling In-Reply-To: <13166.1186045008@neuling.org> References: <17055.1185944172@neuling.org> <18096.6654.934841.561238@cargo.ozlabs.ibm.com> <31580.1185948147@neuling.org> <1186004885.22717.50.camel@farscape.rchland.ibm.com> <24613.1186034191@neuling.org> <1186039870.5495.595.camel@localhost.localdomain> <13166.1186045008@neuling.org> Content-Type: text/plain Date: Thu, 02 Aug 2007 18:58:16 +1000 Message-Id: <1186045096.5495.617.camel@localhost.localdomain> Mime-Version: 1.0 Cc: linuxppc-dev@ozlabs.org, will_schmidt@vnet.ibm.com, Paul Mackerras List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Thu, 2007-08-02 at 18:56 +1000, Michael Neuling wrote: > > > But even in the case of a checkpoint restart, the ordering will be > > > preserved as the NIA we get as part of the checkpoint will have > all > > > previous instructions complete and none of the following > instructions > > > started. > > > > Instruction completion isn't enough to ensure storage ordering. The > > stores may well be complete but the data still in separate store > queues. > > POWER6 flushes the store queues when we take a checkpoint. Ok, that was missing from your description :-) Cheers, Ben.