[dm-devel] Re: [PATCH RFC 0/4] use scatter lists for all block pc requests and simplify hw handlers

[Lars Marowsky-Bree]

On 2005-06-06T19:04:09, Michael Christie <michaelc at cs.wisc.edu> wrote:

> > It's on the TODO list. It's just not done yet. Essentially we need
> > to be able to set BW_RW_FAILFAST from user-space for SGIO.
> > 
> Isn't this a seperate issue? It looks like the RHAT bugzilla asks to
> be able to insert directly at the head of the queue so you do you not
> have to wait for possibly a hundred IO to complete before the test IO.
> Setting failfast just means in case of en error it will be returned
> faster (no wasting time retying).

Uhm, sorry, you're right. We actually want/need to be able to set both,
but it would sort of end up being the same mechanism (additional flags
to SGIO) and so I have it mentally lumped together ;-)


Sincerely,
    Lars Marowsky-Brée <lmb at suse.de>

-- 
High Availability & Clustering
SUSE Labs, Research and Development
SUSE LINUX Products GmbH - A Novell Business	 -- Charles Darwin
"Ignorance more frequently begets confidence than does knowledge"