[SCM] Samba Shared Repository - branch master updated

[Jeremy Allison]

On Fri, Jan 06, 2012 at 10:29:27PM +0100, Volker Lendecke wrote:
> On Fri, Jan 06, 2012 at 09:59:13AM -0800, Jeremy Allison wrote:
> > > Hmmm. I don't think this is the right approach. Think 1 CPU,
> > > 16 disks in a fat raid0. You want all spindles busy I think.
> > 
> > Ok, how do you suggest this is tuned ?
> 
> Don't know. My gut feeling is that we will end up with a
> global credit algorithm pretty soon. I think the aio module
> is too low-level for this, we should just spawn threads as
> more aio requests come in. For smb1 I am not too worried
> that we get overflowed, but with smb2 the picture might
> change. But there we have the credit algorithm to slow down
> clients when we get overflowed. I have no clue yet how this
> might work, but I think that is the right place to tackle
> the problem of getting flooded.

Ok, for now I've allowed a "aio num threads" module
parameter to override the num cores heuristic.

Or should I just set this to the number of credits
allowed in SMB2 ?

Jeremy.