From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753262Ab0CYIjx (ORCPT ); Thu, 25 Mar 2010 04:39:53 -0400 Received: from mail-wy0-f174.google.com ([74.125.82.174]:57777 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751616Ab0CYIjw (ORCPT ); Thu, 25 Mar 2010 04:39:52 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=GqDpy2j66Ecz5Sr0zzsZaXPXykPXUr8JPt9B47mauv0F3twmWD/8Str7ZxCesYjnhk pWy4CNkNSbYWCAbjfowAsJ+PcCJnEUGlC+W/zzYu9GfsBMCvsIfSHgNZDkubvyIdIflO HxzyZzEO/6813UVHjuwHMYXlrhnsd0CTyCLn0= MIME-Version: 1.0 In-Reply-To: <1269417391.8599.188.camel@pasglop> References: <1269417391.8599.188.camel@pasglop> Date: Thu, 25 Mar 2010 14:09:49 +0530 Message-ID: <62fe9ccc1003250139m7e8fecf9g2976a1bc244f6aa5@mail.gmail.com> Subject: Re: [PATCH 1/2] mm/vmalloc: Export purge_vmap_area_lazy() From: MJ embd To: Benjamin Herrenschmidt Cc: linuxppc-dev , Nick Piggin , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" 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 On Wed, Mar 24, 2010 at 1:26 PM, Benjamin Herrenschmidt wrote: > Some powerpc code needs to ensure that all previous iounmap/vunmap has > really been flushed out of the MMU hash table. Without that, various > hotplug operations may fail when trying to return those pieces to > the hypervisor due to existing active mappings. Are you talking about KVM or any other hypervisor ?