From: Zhang, Yanmin <yanmin.zhang@xxxxxxxxx>
Function lazy_mmu_prot_update is also used on huge pages when it is called
by set_huge_ptep_writable, but it isn’t aware of huge pages.
The patch against 2.6.16-rc4 fixes it. Thank Ken for good suggestions.
Signed-off-by: Zhang Yanmin <yanmin.zhang@xxxxxxxxx>
---
diff -Nraup linux-2.6.16-rc4/arch/ia64/mm/init.c linux-2.6.16-rc4_lazy_mmu/arch/ia64/mm/init.c
--- linux-2.6.16-rc4/arch/ia64/mm/init.c 2006-02-22 19:19:02.000000000 +0800
+++ linux-2.6.16-rc4_lazy_mmu/arch/ia64/mm/init.c 2006-02-23 18:29:00.000000000 +0800
@@ -109,6 +109,7 @@ lazy_mmu_prot_update (pte_t pte)
{
unsigned long addr;
struct page *page;
+ unsigned long order;
if (!pte_exec(pte))
return; /* not an executable page... */
@@ -119,7 +120,12 @@ lazy_mmu_prot_update (pte_t pte)
if (test_bit(PG_arch_1, &page->flags))
return; /* i-cache is already coherent with d-cache */
- flush_icache_range(addr, addr + PAGE_SIZE);
+ if (PageCompound(page)) {
+ order = (unsigned long) (page[1].lru.prev);
+ flush_icache_range(addr, addr + (1UL << order << PAGE_SHIFT));
+ }
+ else
+ flush_icache_range(addr, addr + PAGE_SIZE);
set_bit(PG_arch_1, &page->flags); /* mark page as clean */
}
-
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