linux-kernel - Re: [PATCH 20/21] mm: drop vmtruncate

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Message-ID: <CANGUGtAF0CRzYOkjqCXvxukw99Y9G02Ht=DZ8viRHqThGHLSSQ@mail.gmail.com>
Date:	Fri, 16 Nov 2012 08:45:25 +0100
From:	Marco Stornelli <marco.stornelli@...il.com>
To:	Jaegeuk Hanse <jaegeuk.hanse@...il.com>
Cc:	Linux FS Devel <linux-fsdevel@...r.kernel.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 20/21] mm: drop vmtruncate

2012/11/16 Jaegeuk Hanse <jaegeuk.hanse@...il.com>:
> On 11/03/2012 05:32 PM, Marco Stornelli wrote:
>>
>> Removed vmtruncate
>
>
> Hi Marco,
>
> Could you explain me why vmtruncate need remove? What's the problem and how
> to substitute it?
>
> Regards,
> Jaegeuk
>

vmtruncate is a deprecated function so it'd be better to remove it.
The truncate sequence is changed for several reasons. The
documentation is clear: "This function is deprecated and
truncate_setsize or truncate_pagecache should be used instead,
together with filesystem specific block truncation." In addition, we
can remove the truncate callback from the inode struct saving 4/8
bytes.

Marco
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