Re: [PATCH 1/3] Separate IRQ-stacks from 4K-stacks option

[Lee Revell]

On Wed, 2004-10-20 at 14:51, Alan Cox wrote:
> On Mer, 2004-10-20 at 17:39, Lee Revell wrote:
> > The IDE I/O completion in hardirq context means that one can run for
> > almost 3ms.  Apparently at OLS it was decided that the target for
> > desktop responsiveness was 1ms.  So this is a real problem.
> > 
> > What exactly do you mean by "draconian"?
> 
> It means "fix the ide layer", patches welcome. 
> 

In addition to the IDE layer how about this (from the link in my
previous mail):

On Sat, 2004-07-24 at 02:43, Ingo Molnar wrote: 
> 
> Another thing would be to create a compound structure for bio and
> [typical sizes of] bio->bi_io_vec and free them as one entity, this
> would get rid of one of the cachemisses. (there cannot be a 3-way
> compound structure that includes the bh too because the bh is freed
> later on by ext3.)
> 

Sounds like a big win for any user of the bio layer, if it's as
straightforward as Ingo says...

Lee

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