linux-kernel - Re: [RFC v2][PATCH]page_fault retry with NOPAGE

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Message-ID: <604427e00903311717u20633bara3feca0c4f30e570@mail.gmail.com>
Date:	Tue, 31 Mar 2009 17:17:52 -0700
From:	Ying Han <yinghan@...gle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org, mingo@...e.hu,
	mikew@...gle.com, rientjes@...gle.com, rohitseth@...gle.com,
	hugh@...itas.com, a.p.zijlstra@...llo.nl, hpa@...or.com,
	edwintorok@...il.com, lee.schermerhorn@...com, npiggin@...e.de
Subject: Re: [RFC v2][PATCH]page_fault retry with NOPAGE_RETRY

Thanks Andrew. I have the patches for all the arches and i just need
to clean them up a little bit. I will send them to you ASAP.

--Ying

On Tue, Mar 31, 2009 at 3:00 PM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
> On Fri, 5 Dec 2008 11:40:19 -0800
> Ying Han <yinghan@...gle.com> wrote:
>
>> changelog[v2]:
>> - reduce the runtime overhead by extending the 'write' flag of
>>   handle_mm_fault() to indicate the retry hint.
>> - add another two branches in filemap_fault with retry logic.
>> - replace find_lock_page with find_lock_page_retry to make the code
>>   cleaner.
>>
>> todo:
>> - there is potential a starvation hole with the retry. By the time the
>>   retry returns, the pages might be released. we can make change by holding
>>   page reference as well as remembering what the page "was"(in case the
>>   file was truncated). any suggestion here are welcomed.
>>
>> I also made patches for all other arch. I am posting x86_64 here first and
>> i will post others by the time everyone feels comfortable of this patch.
>
> I'm about to send this into Linus.  What happened to the patches for
> other architectures?
>
> Please send them over when convenient and I'll work on getting them
> trickled out to arch maintainers, thanks.
>
>
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