Re: 2.5 'what to expect'

Jeff Garzik (
Sun, 13 Jul 2003 11:55:49 -0400

Andreas Dilger wrote:
> On Jul 12, 2003 20:46 +0100, Jamie Lokier wrote:
>>Jeff Garzik wrote:
>>>Jamie Lokier wrote:
>>>>2.4 fails on write()? A strace of "rpm --rebuilddb" shows it is
>>>>opening with O_DIRECT and writing just fine. Or does that only work
>>>>with RedHat's 2.4 kernels?
>>>Are you testing on a filesystem where an O_DIRECT is not supported?
>>>The "it works" case is not an issue.
> ext3 in 2.4 kernels does not support O_DIRECT. To confuse matters,
> recent RH kernels silently ignore O_DIRECT if you are not root, so
> you may think O_DIRECT is being used, but it isn't.

ahhh, that's probably what is going on. I was thinking only of stock
2.4 behavior (open succeeds, write fails).


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