Messages in this thread | | | Date | Thu, 26 Feb 2004 15:30:43 +0200 (IST) | From | Hayim Shaul <> | Subject | Re: Latest AIO patchset |
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On Wed, 25 Feb 2004, Benjamin LaHaise wrote:
> 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. >
ext3 I'm think it does support ext3.
Actually, I was wrong. open does succeed. It return a valid fd but after writing and exiting, the file is still zero size.
removing the O_DIRECT with the same prog writes quite alot to the file.
Hayim.
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