On Fri, 25 Feb 2005 18:20:55 +1100
Benjamin Herrenschmidt <[EMAIL PROTECTED]> wrote:
> Ok, LTP dies on POWER5, investigation in progress ;)
I bet the address arg is incorrect in some case. It is easy
to add debugging for this, for example in your set_pte_at()
implementation you can do something like:
static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte)
{
#ifdef DEBUG_SET_PTE_AT
{
pgd_t *pgd_check = pgd_offset(mm, addr);
pud_t *pud_check = pud_offset(pgd_check, addr);
pmd_t *pmd_check = pmd_offset(pud_check, addr);
pte_t *pte_check = pte_offset(pmd_check, addr);
BUG_ON(pte_check != ptep);
}
#endif
}
BUG_ON() may hinder debugging if you hit a range of such
incorrect calculations, so maybe a single printk which
just prints __builtin_return_address(0) or current_text_addr()
as well.
