Re: 2.5 'what to expect'

[Jeff Garzik]

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.
> 
> 
> 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).

	Jeff