linux-kernel - Re: [PATCHv2 0/3] Find mirrored memory, use for boot time allocations

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Message-Id: <20150508134901.e3e7585b359b073253788c22@linux-foundation.org>
Date:	Fri, 8 May 2015 13:49:01 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Tony Luck <tony.luck@...il.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCHv2 0/3] Find mirrored memory, use for boot time
 allocations

On Fri, 8 May 2015 13:38:52 -0700 Tony Luck <tony.luck@...il.com> wrote:

> > Will surplus ZONE_MIRROR memory be available for regular old movable
> > allocations?
> ZONE_MIRROR and ZONE_MOVABLE are pretty much opposites. We
> only want kernel allocations in mirror memory, and we can't allow any
> kernel allocations in movable (cause they'll pin it).

What I mean is: allow userspace to consume ZONE_MIRROR memory because
we can snatch it back if it is needed for kernel memory.

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