Re: open(.. O_DIRECT ..) difference in between Linux and FreeBSD ..

Arjan van de Ven (arjanv@redhat.com)
Fri, 13 Jun 2003 07:47:02 +0000

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In reply to: Rob van Nieuwkerk: "Re: open(.. O_DIRECT ..) difference in between Linux and FreeBSD .."

On Fri, Jun 13, 2003 at 01:12:57AM +0200, Rob van Nieuwkerk wrote:
> FYI:
> It appears that somewhere between RH kernels 2.4.18-27.7.x and 2.4.20-18.9
> something has changed so that my application needs a O_SYNC too besides
> the O_DIRECT to make sure that writes will be synchronous. If I leave
> the O_SYNC out with 2.4.20-18.9 the write will happen physically 35
> seconds after the write() was done.

O_DIRECT is nothing but a hint and the 2.4.20-18.9 kernel decides to not
honor it
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In reply to: Rob van Nieuwkerk: "Re: open(.. O_DIRECT ..) difference in between Linux and FreeBSD .."