linux-kernel - Re: [PATCH 03/10] mm: Convert p[te|md]_numa users to p[te|md]_protnone

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Message-ID: <87d280bqfw.fsf@linux.vnet.ibm.com>
Date:	Wed, 03 Dec 2014 22:50:35 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Rik van Riel <riel@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Hugh Dickins <hughd@...gle.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux-MM <linux-mm@...ck.org>, Ingo Molnar <mingo@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	Sasha Levin <sasha.levin@...cle.com>,
	Dave Jones <davej@...hat.com>,
	LinuxPPC-dev <linuxppc-dev@...ts.ozlabs.org>,
	Kirill Shutemov <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH 03/10] mm: Convert p[te|md]_numa users to p[te|md]_protnone_numa

Mel Gorman <mgorman@...e.de> writes:

> On Wed, Dec 03, 2014 at 08:53:37PM +0530, Aneesh Kumar K.V wrote:
>> Benjamin Herrenschmidt <benh@...nel.crashing.org> writes:
>> 
>> > On Tue, 2014-12-02 at 12:57 +0530, Aneesh Kumar K.V wrote:
>> >> Now, hash_preload can possibly insert an hpte in hash page table even if
>> >> the access is not allowed by the pte permissions. But i guess even that
>> >> is ok. because we will fault again, end-up calling hash_page_mm where we
>> >> handle that part correctly.
>> >
>> > I think we need a test case...
>> >
>> 
>> I ran the subpageprot test that Paul had written. I modified it to ran
>> with selftest. 
>> 
>
> It's implied but can I assume it passed? 

Yes.

-bash-4.2# ./subpage_prot 
test: subpage_prot
tags: git_version:v3.17-rc3-13511-g0cd3756
allocated malloc block of 0x4000000 bytes at 0x0x3fffb0d10000
testing malloc block...
OK
success: subpage_prot
-bash-4.2# 

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