Re: [Bug #11342] Linux 2.6.27-rc3: kernel BUG at mm/vmalloc.c - bisected

Arjan van de Ven
2008-08-27T10:58:58Z

Paul Mackerras wrote:
> Linus Torvalds writes:
>
>> 4kB used to be the _only_ choice. And no, there weren't even irq stacks.
>> So that 4kB was not just the whole kernel call-chain, it was also all the
>> irq nesting above it.
>
> I think your memory is failing you. In 2.4 and earlier, the kernel
> stack was 8kB minus the size of the task_struct, which sat at the
> start of the 8kB. For instance, from include/asm-i386/processor.h for
> 2.4.29:

but was shared with interrupts; so out of the 6Kb left, you had still really only 4Kb for user context stack