From 8b14cb9953c6b569327e9372718cff09a98f9589 Mon Sep 17 00:00:00 2001 From: Zachary Amsden Date: Tue, 21 Aug 2007 18:30:36 -0700 Subject: [PATCH] Fix lazy mode vmalloc synchronization for paravirt Touching vmalloc memory in the middle of a lazy mode update can generate a kernel PDE update, which must be flushed immediately. The fix is to leave lazy mode when doing a vmalloc sync. Signed-off-by: Zachary Amsden Acked-by: Jeremy Fitzhardinge Signed-off-by: Linus Torvalds --- arch/i386/mm/fault.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/i386/mm/fault.c b/arch/i386/mm/fault.c index 01ffdd4964f0..fcb38e7f3543 100644 --- a/arch/i386/mm/fault.c +++ b/arch/i386/mm/fault.c @@ -249,9 +249,10 @@ static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address) pmd_k = pmd_offset(pud_k, address); if (!pmd_present(*pmd_k)) return NULL; - if (!pmd_present(*pmd)) + if (!pmd_present(*pmd)) { set_pmd(pmd, *pmd_k); - else + arch_flush_lazy_mmu_mode(); + } else BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k)); return pmd_k; } -- 2.30.2