linux-kernel - Re: [PATCH 2/2] ubifs: Allow O

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Message-ID: <20150824161837.GA28975@localhost>
Date:	Mon, 24 Aug 2015 09:18:37 -0700
From:	Brian Norris <computersforpeace@...il.com>
To:	Artem Bityutskiy <dedekind1@...il.com>
Cc:	Richard Weinberger <richard@....at>,
	Dongsheng Yang <yangds.fnst@...fujitsu.com>,
	linux-mtd@...ts.infradead.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] ubifs: Allow O_DIRECT

On Mon, Aug 24, 2015 at 10:13:25AM +0300, Artem Bityutskiy wrote:
> Now, some user-space fails when direct I/O is not supported.

I think the whole argument rested on what it means when "some user space
fails"; apparently that "user space" is just a test suite (which
can/should be fixed).

> We can
> chose to fake direct I/O or fix user-space. The latter seems to be the
> preferred course of actions, and you are correctly pointing the man
> page.
> 
> However, if
> 
> 1. we are the only FS erroring out on O_DIRECT
> 2. other file-systems not supporting direct IO just fake it
> 
> we may just follow the crowd and fake it too.
> 
> I am kind of trusting Richard here - I assume he did the research and
> the above is the case, this is why I am fine with his patch.
> 
> Does this logic seem acceptable to you? Other folk's opinion would be
> great to hear.

Could work for me, though that doesn't seem ideal. Anyway, it now seems
Christopher and Richard agree with me.

Regards,
Brian
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