Re: ext3 IO latency measurements (was: Linux 2.6.29)

[Matthew Garrett]

On Thu, Mar 26, 2009 at 08:42:09PM +0000, Alan Cox wrote:
> > before performing the update. So while relatime doesn't conform, the 
> > practical difference is meaningless. You can't depend on atime being 
> > updated in a timely manner.
> 
> POSIX says a disk write interrupted by a signal can be a short write. If
> you do this in practice all hell breaks loose.
> 
> A conforming implementation needs to conform with expectations not just
> play lawyer games with users systems.

I agree, but arguing for something on the basis of a spec isn't terribly 
convincing if the spec allows effectively identical behaviour. SuS isn't 
a relevant consideration when it comes to deciding default atime policy.

-- 
Matthew Garrett | mjg59@xxxxxxxxxxxxx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/