From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1034922AbdEYRFi (ORCPT ); Thu, 25 May 2017 13:05:38 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:42181 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S942946AbdEYRFd (ORCPT ); Thu, 25 May 2017 13:05:33 -0400 Date: Thu, 25 May 2017 19:05:26 +0200 From: Pavel Machek To: Kevin McKinney Cc: linux-kernel@vger.kernel.org Subject: Re: Change PAGE_SIZE from minimum 4k to 12k Message-ID: <20170525170526.GD3085@amd> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="5gxpn/Q6ypwruk0T" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --5gxpn/Q6ypwruk0T Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue 2017-05-16 11:27:08, Kevin McKinney wrote: > Hi Everyone, >=20 > 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. >=20 > If this is the wrong mailing list, please let me know the right one to us= e. I won't say "no" but ammount of work neccessary is likely measured in man-years. Plus, hardware page size _is_ 4KB. Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --5gxpn/Q6ypwruk0T Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlknDtYACgkQMOfwapXb+vJv0wCfYx32SZ7kkvabdOqG9w8BONjX ApQAn0ZC8Im87p91/+MhtQAg4QQxOPJO =fk0u -----END PGP SIGNATURE----- --5gxpn/Q6ypwruk0T--