linux-kernel - Re: Change PAGE_SIZE from minimum 4k to 12k

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Message-ID: <20170525170526.GD3085@amd>
Date:   Thu, 25 May 2017 19:05:26 +0200
From:   Pavel Machek <pavel@....cz>
To:     Kevin McKinney <klmckinney1@...il.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: Change PAGE_SIZE from minimum 4k to 12k

On Tue 2017-05-16 11:27:08, Kevin McKinney wrote:
> Hi Everyone,
> 
> Would it be possible to have a custom block device driver read/write
> in increments of 12k instead of reading/writing data in 4k increments?
> In other words, I would like to change the default page size on a
> x86_64 platform (4.4.0 kernel) from 4k to 12k as the minimum page
> size?  I understand I may have negative performance due to
> fragmentation. Any help would be appreciated.
> 
> If this is the wrong mailing list, please let me know the right one to use.

I won't say "no" but ammount of work neccessary is likely measured in
man-years. Plus, hardware page size _is_ 4KB.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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