linux-kernel - Re: [PATCH] [31/31] HWPOISON: Add a madvise() injector for soft page offlining

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Message-ID: <AANLkTikMZu0GXwzs6IeMyoTuhETrnjZ1m5lI9FTauYBA@mail.gmail.com>
Date:	Sun, 20 Jun 2010 08:19:35 +0200
From:	Michael Kerrisk <mtk.manpages@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	fengguang.wu@...el.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH] [31/31] HWPOISON: Add a madvise() injector for soft page 
	offlining

Hi Andi,
On Sat, Jun 19, 2010 at 9:52 PM, Andi Kleen <andi@...stfloor.org> wrote:
>> .TP
>> .BR MADV_SOFT_OFFLINE " (Since Linux 2.6.33)
>> Soft offline the pages in the range specified by
>> .I addr
>> and
>> .IR length .
>> This memory of each page in the specified range is copied to a new page,
>
> Actually there are some cases where it's also dropped if it's cached page.
>
> Perhaps better would be something more fuzzy like
>
> "the contents are preserved"

The problem to me is that this gets so fuzzy that it's hard to
understand the meaning (I imagine many readers will ask: "What does it
mean that the contents are preserved"?). Would you be able to come up
with a wording that is a little miore detailed?

>> and the original page is offlined
>> (i.e., no longer used, and taken out of normal memory management).

Thanks,

Michael


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Author of "The Linux Programming Interface" http://blog.man7.org/
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