mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Matti Aarnio <matti.aarnio@zmailer.org>
To: linux-kernel@vger.kernel.org
Subject: open(.. O_DIRECT ..) difference in between Linux and FreeBSD ..
Date: Thu, 12 Jun 2003 14:14:37 +0300	[thread overview]
Message-ID: <20030612111437.GE28900@mea-ext.zmailer.org> (raw)

I have been debugging long and hard a thing where IO is done
with O_DIRECT flag applied to open(2).

Unlike Linux, FreeBSD (where this flag originates, apparently) does
_not_ require that read()/write() happens from page aligned memory
areas, and/or be of page-size multiples in size.

This needs at least wording in  open(2) man-page, possibly code
changes in the kernel to support alike behaviour.

/Matti Aarnio

             reply	other threads:[~2003-06-12 11:00 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-06-12 11:14 Matti Aarnio [this message]
2003-06-12 11:24 ` Christoph Hellwig
2003-06-12 13:17 ` Andries Brouwer
2003-06-12 14:58   ` Dave Jones
2003-06-12 15:09     ` Matti Aarnio
2003-06-12 23:14       ` Nuno Silva
2003-06-13 21:05       ` Andries Brouwer
2003-06-12 23:12   ` Rob van Nieuwkerk
2003-06-13  7:47     ` Arjan van de Ven
2003-06-13  8:27       ` Rob van Nieuwkerk
2003-06-13  8:28         ` Arjan van de Ven
2003-06-13  9:02           ` Rob van Nieuwkerk
     [not found] <20030612111437.GE28900@mea-ext.zmailer.org.suse.lists.linux.kernel>
2003-06-12 11:26 ` Andi Kleen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20030612111437.GE28900@mea-ext.zmailer.org \
    --to=matti.aarnio@zmailer.org \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®