Messages in this thread | | | Date | Wed, 27 Aug 2008 16:01:50 +1000 | From | Paul Mackerras <> | Subject | Re: [Bug #11342] Linux 2.6.27-rc3: kernel BUG at mm/vmalloc.c - bisected |
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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:
#define THREAD_SIZE (2*PAGE_SIZE) #define alloc_task_struct() ((struct task_struct *) __get_free_pages(GFP_KERNEL,1)) #define free_task_struct(p) free_pages((unsigned long) (p), 1)
Paul.
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