linux-kernel - Re: [PATCH v11 0/3] mm, x86, powerpc: Enhancements to Memory Protection Keys.

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Message-ID: <20180131070711.pad45qmnougnh4vf@gmail.com>
Date:   Wed, 31 Jan 2018 08:07:11 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Ram Pai <linuxram@...ibm.com>
Cc:     mpe@...erman.id.au, mingo@...hat.com, akpm@...ux-foundation.org,
        linuxppc-dev@...ts.ozlabs.org, linux-mm@...ck.org, x86@...nel.org,
        linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
        dave.hansen@...el.com, benh@...nel.crashing.org, paulus@...ba.org,
        khandual@...ux.vnet.ibm.com, aneesh.kumar@...ux.vnet.ibm.com,
        bsingharora@...il.com, hbabu@...ibm.com, mhocko@...nel.org,
        bauerman@...ux.vnet.ibm.com, ebiederm@...ssion.com, corbet@....net,
        arnd@...db.de, fweimer@...hat.com, msuchanek@...e.com
Subject: Re: [PATCH v11 0/3] mm, x86, powerpc: Enhancements to Memory
 Protection Keys.


* Ram Pai <linuxram@...ibm.com> wrote:

> This patch series provides arch-neutral enhancements to
> enable memory-keys on new architecutes, and the corresponding
> changes in x86 and powerpc specific code to support that.
> 
> a) Provides ability to support upto 32 keys.  PowerPC
> 	can handle 32 keys and hence needs this.
> 
> b) Arch-neutral code; and not the arch-specific code,
>    determines the format of the string, that displays the key
>    for each vma in smaps.
> 
> PowerPC implementation of memory-keys is now in powerpc/next tree.
> https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=next&id=92e3da3cf193fd27996909956c12a23c0333da44

All three patches look sane to me. If you would like to carry these generic bits 
in the PowerPC tree as well then:

  Reviewed-by: Ingo Molnar <mingo@...nel.org>

Thanks,

	Ingo