Re: [2.6 patch] i386: always use 4k stacks

Dave Jones
2005-11-15T03:28:30Z

On Mon, Nov 14, 2005 at 09:07:48PM -0500, Lee Revell wrote:
> On Mon, 2005-11-14 at 19:02 -0600, Robert Hancock wrote:
> > Giridhar Pemmasani wrote:
> > > Shouldn't I have to prevent scheduler from changing the tasks when executing
> > > Windows code? Otherwise, kernel gets wrong current thread information,
> > > which is based on stack pointer. This is the stumbling block for implementing
> > > private stacks.
> >
> > As long as preemption is disabled when the driver code is executing
>
> Um, but it's really really bad for drivers to do that.

And loading Windows drivers into the kernel isn't ?
I think we're already in no-mans land here.

Remember, we have no clue what those drivers are even doing.
Preemption is the least of its problems.

Dave