Re: [NBD] patch and documentation

[Pavel Machek]

Hi!

> >>Well, i guess the cache uses a value of 256 sectors to do read-ahead and
> >>such.
> >
> >Well it sounds like the real problem here is the vm_max_readahead
> >setting then. Try this:
> 
> I will try it, although i think that i'm using the deafult values.
> 
> Anyway: the NBD module should set the max_sectors to a certain value - i 
> chose 256 sectors. Perhaps Pavel or Paul may decide to use a higher ot 
> smaller value. A limit should be part of the protocol or handshaked when 
> connecting to the server (what is not possible without changing the 
> protocol)

I do not see a reason it should be handshaked. IMNSHO we should simply
say that no request should be bigger than 1MB in protocol, make sure
that kernel does <=128KB requests, and make sure nbd-servers can
handle 1MB, and be done with that.
								Pavel

-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]
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