Re: [Patch 5/7] synchronous block I/O delays

[Arjan van de Ven]

On Mon, 2006-02-27 at 04:13 -0500, Shailabh Nagar wrote:
> Arjan van de Ven wrote:
> 
> >>+static inline void delayacct_blkio(void)
> >>+{
> >>+	if (unlikely(current->delays && delayacct_on))
> >>+		__delayacct_blkio();
> >>+}
> >>    
> >>
> >
> >why is this unlikely?
> >  
> >
> delayacct_on is expected to be off most of the time, hence the compound is
> unlikely too.


ok that opens the question: why is this a runtime tunable?
Is it really worth all this complexity?


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