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

[Jeff V. Merkey]

Robert Hancock wrote:

> Jeff V. Merkey wrote:
>
> > What?  There's more kernel apps than just ndis network drivers that 
> > get ported.  ndiswrapper is busted (which is used for a lot of laptops)
> > without 4K stacks.
>
>
> Which is why ndiswrapper needs to get fixed to work with 4K stacks. 
> ndiswrapper is the thing that's doing the wierd stuff, it needs to 
> adapt to the kernel, not the other way around. The reasons to use 4K 
> stacks are strong enough that they are not made up for by the fact 
> that ndiswrapper currently would like to have more stack space.

The NDIS drivers require the 8K stack, not ndiswrapper.

> Windows apparently has 12K of kernel stack for drivers.. in that case 
> even 8K of stack in Linux would not necessarily be enough. If 
> ndiswrapper wants to run Windows code in the kernel with any amount of 
> reliability it should be providing its own stack which is the size 
> that the code expects.
>
> > My laptop is a Compaq and there isn't a Linux driver for the 
> > wireless.  I also discovered Fedora Core 4 won't install
> > on a Compaq Presario with SATA (stacks crashes).
>
>
> How do you know this is related to the stack? Did you report this as a 
> bug?


Because I use MDB, a kernel debugger I wrote that inserts beneath Linux 
via DRLX or inside of it, and I watched it crash in the Linux SCSI 
code.  There's code in Linux proper that also walks off the end of the 
stack.  No I did not report it.  But now I have.

Jeff

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