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Date: Wed, 25 Feb 2004 19:27:15 -0500
From: Benjamin LaHaise <bcrl@kvack.org>
To: Hayim Shaul <hayim@post.tau.ac.il>
Cc: Suparna Bhattacharya <suparna@in.ibm.com>, akpm@osdl.org,
       linux-aio@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: Latest AIO patchset
Message-ID: <20040225192715.B11294@kvack.org>
References: <20040224160341.GA11739@in.ibm.com> <Pine.LNX.4.44.0402252026460.12841-100000@soul.math.tau.ac.il>
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In-Reply-To: <Pine.LNX.4.44.0402252026460.12841-100000@soul.math.tau.ac.il>; from hayim@post.tau.ac.il on Wed, Feb 25, 2004 at 08:45:29PM +0200
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On Wed, Feb 25, 2004 at 08:45:29PM +0200, Hayim Shaul wrote:
> What exactly is the O_DIRECT flag? When I add this flag to the open func
> it fails.
> 
> More specificaly, this function fails
>   open("filename", O_RDWR | O_DIRECT | O_LARGEFILE | O_CREAT, S_IRWXU);   
> 
> but this one succeeds
>   open("filename", O_RDWR | O_LARGEFILE | O_CREAT, S_IRWXU);   
> 
> I'm running linux 2.6.0 with libaio 0.3.92.

Which filesystem?  Not all support O_DIRECT.

		-ben