linux-kernel - Re: [PATCH 1/2] mm/vmalloc: Export purge_vmap_area

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Message-ID: <62fe9ccc1003250139m7e8fecf9g2976a1bc244f6aa5@mail.gmail.com>
Date:	Thu, 25 Mar 2010 14:09:49 +0530
From:	MJ embd <mj.embd@...il.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
	Nick Piggin <npiggin@...e.de>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] mm/vmalloc: Export purge_vmap_area_lazy()

On Wed, Mar 24, 2010 at 1:26 PM, Benjamin Herrenschmidt
<benh@...nel.crashing.org> 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 ?
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