linux-kernel - Re: [PATCH v2 3/3] x86: Support local_flush_tlb_kernel

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Message-ID: <1337267329.4281.32.camel@twins>
Date:	Thu, 17 May 2012 17:08:49 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Nitin Gupta <ngupta@...are.org>,
	Seth Jennings <sjenning@...ux.vnet.ibm.com>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Tejun Heo <tj@...nel.org>,
	David Howells <dhowells@...hat.com>, x86@...nel.org,
	Nick Piggin <npiggin@...il.com>
Subject: Re: [PATCH v2 3/3] x86: Support local_flush_tlb_kernel_range

On Thu, 2012-05-17 at 16:51 +0200, Peter Zijlstra wrote:
> 
> Also, does it even work if the range happens to be backed by huge pages?
> IIRC we try and do the identity map with large pages wherever possible. 

OK, the Intel SDM seems to suggest it will indeed invalidate ANY mapping
to that linear address, which would include 2M and 1G pages.
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