lkml.org 
[lkml]   [2001]   [Nov]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] cache colour task_structs
Alan Cox wrote:
>
> > The attached patch moves the task structure into a slab, with normal
> > cache colouring.
> > It's tested with i386 SMP.(i.e. it boots and runs X)
>
> Keeping the stack and task struct together is smarter. You fix the one
> problem but not the other horror.
>
If we keep both together we are limited to 8 kB for stack, task
structure and slack for colouring - I'm not sure if that won't cause
stack overruns. We are already down to 6.3 kB stack.

> We need to perturb esp colour too. It might be the right way to do this
> is slab based kernel stacks, it might be that your code is cheaper than
> the cost of getting current the really hard way and we should just add
> random numbers to the initial esp of a task ?
>
Adding a random amount would be a one line change to copy_thread.

--
Manfred
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:12    [W:0.040 / U:0.712 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site