linux-kernel - Re: [RFC v5 36/38] selftest: PowerPC specific test updates to memory protection keys

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Message-Id: <20170712215729.GC5525@ram.oc3035372033.ibm.com>
Date:   Wed, 12 Jul 2017 14:57:29 -0700
From:   Ram Pai <linuxram@...ibm.com>
To:     Dave Hansen <dave.hansen@...el.com>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-mm@...ck.org, x86@...nel.org,
        linux-doc@...r.kernel.org, linux-kselftest@...r.kernel.org,
        benh@...nel.crashing.org, paulus@...ba.org, mpe@...erman.id.au,
        khandual@...ux.vnet.ibm.com, aneesh.kumar@...ux.vnet.ibm.com,
        bsingharora@...il.com, hbabu@...ibm.com, arnd@...db.de,
        akpm@...ux-foundation.org, corbet@....net, mingo@...hat.com
Subject: Re: [RFC v5 36/38] selftest: PowerPC specific test updates to memory
 protection keys

On Tue, Jul 11, 2017 at 10:33:09AM -0700, Dave Hansen wrote:
> On 07/05/2017 02:22 PM, Ram Pai wrote:
> > Abstracted out the arch specific code into the header file, and
> > added powerpc specific changes.
> > 
> > a) added 4k-backed hpte, memory allocator, powerpc specific.
> > b) added three test case where the key is associated after the page is
> > 	accessed/allocated/mapped.
> > c) cleaned up the code to make checkpatch.pl happy
> 
> There's a *lot* of churn here.  If it breaks, I'm going to have a heck
> of a time figuring out which hunk broke.  Is there any way to break this
> up into a series of things that we have a chance at bisecting?

Just finished breaking down the changes into 20 gradual increments.
I have pushed it to my github tree at

https://github.com/rampai/memorykeys.git
branch is memkey.v6-rc3

See if it works for you. I am sure I would have broken something on
x86 since I dont have a x86 platform to test.

Let me know, Thanks,
RP