LKML Archive on
help / color / mirror / Atom feed
From: OGAWA Hirofumi <>
To: Jan Kara <>
Subject: Re: Direct IO for fat
Date: Fri, 09 Feb 2007 22:42:29 +0900	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <> (Jan Kara's message of "Fri\, 9 Feb 2007 08\:19\:55 +0100")

Jan Kara <> writes:

>> I see. When I wrote this, I thought kernel should use DIO to write if
>> user sets O_DIRECT. Because the wrong alignment request isn't fallback
>> to buffered-write, and it's also returns EINVAL.
>   I understand. It's just that I've got some surprised users who could not
> track why the hell does write() return EINVAL to them when they have
> everything alligned and the same code works for EXT3 :). Of course, nothing
> guarantees that FAT should behave the same way as EXT3 but I can understand
> they were surprised (I had to look in the code too).
>   I also don't have a strong opinion whether we should fallback to buffered
> write automagically or whether we should return EINVAL and let the user fall
> back to the buffered write himself. But I'd slightly prefer the first
> option.

Hm, ok. I'll change EINVAL to zero as soon as possible after test.

OGAWA Hirofumi <>

      reply	other threads:[~2007-02-09 13:42 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-08 11:28 Jan Kara
2007-02-08 15:44 ` OGAWA Hirofumi
2007-02-08 16:10   ` Jan Kara
2007-02-08 16:40     ` OGAWA Hirofumi
2007-02-08 17:35       ` Jan Kara
2007-02-08 18:41         ` Jan Kara
2007-02-08 19:53           ` OGAWA Hirofumi
2007-02-09  7:19             ` Jan Kara
2007-02-09 13:42               ` OGAWA Hirofumi [this message]

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:

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

  git send-email \ \ \ \ \
    --subject='Re: Direct IO for fat' \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).