linux-kernel - Re: [PATCH v11 01/26] mm: introduce CONFIG_SPECULATIVE_PAGE

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Message-Id: <9a95bb6b-78cb-52a6-9c3a-4869f7cdb079@linux.vnet.ibm.com>
Date:   Tue, 22 May 2018 13:44:48 +0200
From:   Laurent Dufour <ldufour@...ux.vnet.ibm.com>
To:     Matthew Wilcox <willy@...radead.org>,
        Randy Dunlap <rdunlap@...radead.org>
Cc:     akpm@...ux-foundation.org, mhocko@...nel.org, peterz@...radead.org,
        kirill@...temov.name, ak@...ux.intel.com, dave@...olabs.net,
        jack@...e.cz, khandual@...ux.vnet.ibm.com,
        aneesh.kumar@...ux.vnet.ibm.com, benh@...nel.crashing.org,
        mpe@...erman.id.au, paulus@...ba.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, hpa@...or.com,
        Will Deacon <will.deacon@....com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        sergey.senozhatsky.work@...il.com,
        Andrea Arcangeli <aarcange@...hat.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        kemi.wang@...el.com, Daniel Jordan <daniel.m.jordan@...cle.com>,
        David Rientjes <rientjes@...gle.com>,
        Jerome Glisse <jglisse@...hat.com>,
        Ganesh Mahendran <opensource.ganesh@...il.com>,
        Minchan Kim <minchan@...nel.org>,
        Punit Agrawal <punitagrawal@...il.com>,
        vinayak menon <vinayakm.list@...il.com>,
        Yang Shi <yang.shi@...ux.alibaba.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        haren@...ux.vnet.ibm.com, npiggin@...il.com, bsingharora@...il.com,
        paulmck@...ux.vnet.ibm.com, Tim Chen <tim.c.chen@...ux.intel.com>,
        linuxppc-dev@...ts.ozlabs.org, x86@...nel.org
Subject: Re: [PATCH v11 01/26] mm: introduce CONFIG_SPECULATIVE_PAGE_FAULT

On 17/05/2018 19:19, Matthew Wilcox wrote:
> On Thu, May 17, 2018 at 09:36:00AM -0700, Randy Dunlap wrote:
>>> +	 If the speculative page fault fails because of a concurrency is
>>
>> 	                                     because a concurrency is
> 
> While one can use concurrency as a noun, it sounds archaic to me.  I'd
> rather:
> 
> 	If the speculative page fault fails because a concurrent modification
> 	is detected or because underlying PMD or PTE tables are not yet

Thanks Matthew, I'll do that.

> 
>>> +	 detected or because underlying PMD or PTE tables are not yet
>>> +	 allocating, it is failing its processing and a classic page fault
>>
>> 	 allocated, the speculative page fault fails and a classic page fault
>>
>>> +	 is then tried.
>