From: lsorense@csclub.uwaterloo.ca (Lennart Sorensen)
To: Kevin McKinney <klmckinney1@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Change PAGE_SIZE from minimum 4k to 12k
Date: Tue, 16 May 2017 12:46:26 -0400 [thread overview]
Message-ID: <20170516164626.GA9217@csclub.uwaterloo.ca> (raw)
In-Reply-To: <CAKPrQY9Sz739wS5UO42oFh5zSL6VQbxEY6qxgnB74wPE7a4-ig@mail.gmail.com>
On Tue, May 16, 2017 at 11:27:08AM -0400, 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 believe the answer is no.
x86 supports page sizes of 4K, 2M and 1G. I don't believe anything else
is possible with the hardware.
The page size is not a software invention.
--
Len Sorensen
next prev parent reply other threads:[~2017-05-16 16:53 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-16 15:27 Kevin McKinney
2017-05-16 16:46 ` Lennart Sorensen [this message]
2017-05-25 17:05 ` Pavel Machek
2017-05-25 20:08 ` Alan Cox
2017-05-25 21:02 ` Kevin McKinney
2017-05-25 21:55 ` Pavel Machek
2017-05-26 13:14 ` Kevin McKinney
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