Date: Sat, 26 May 2012 17:59:12 +0200
From: Andrea Arcangeli <aarcange@redhat.com>
To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Hillf Danton <dhillf@gmail.com>, Dan Smith <danms@us.ibm.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
        Paul Turner <pjt@google.com>,
        Suresh Siddha <suresh.b.siddha@intel.com>,
        Mike Galbraith <efault@gmx.de>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        Lai Jiangshan <laijs@cn.fujitsu.com>,
        Bharata B Rao <bharata.rao@gmail.com>,
        Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
        Rik van Riel <riel@redhat.com>, Johannes Weiner <hannes@cmpxchg.org>,
        Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
        Christoph Lameter <cl@linux.com>
Subject: Re: [PATCH 03/35] xen: document Xen is using an unused bit for the
 pagetables
Message-ID: <20120526155912.GA4054@redhat.com>
References: <1337965359-29725-1-git-send-email-aarcange@redhat.com>
 <1337965359-29725-4-git-send-email-aarcange@redhat.com>
 <20120525202656.GA23655@phenom.dumpdata.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20120525202656.GA23655@phenom.dumpdata.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1037
Lines: 22

Hi Konrad,

On Fri, May 25, 2012 at 04:26:56PM -0400, Konrad Rzeszutek Wilk wrote:
> On Fri, May 25, 2012 at 07:02:07PM +0200, Andrea Arcangeli wrote:
> > Xen has taken over the last reserved bit available for the pagetables
> > which is set through ioremap, this documents it and makes the code
> > more readable.
> 
> Andrea, my previous respone had a question about this - was wondering
> if you had a chance to look at that in your busy schedule and provide
> some advice on how to remove the _PAGE_IOMAP altogether?

I read you response but I didn't look into the P2M tree and
xen_val_pte code yet sorry. Thanks for looking into this, if it's
possible to remove it without downsides, it would be a nice
cleanup. It's not urgent though, we're not running out of reserved
pte bits yet :).
--
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/