Re: [PATCH] mm: hugetlb: flush dcache before returning zeroed huge page to userspace
From: Will Deacon <hidden>
Date: 2012-08-16 18:33:15
Also in:
linux-arch, lkml
On Thu, Aug 16, 2012 at 07:20:15PM +0100, Michal Hocko wrote:
On Thu 16-08-12 17:09:54, Will Deacon wrote:quoted
+static inline void arch_clear_hugepage_flags(struct page *page) +{ + flush_dcache_page(page); +} +Why do we need the hook for ia64? hugetlb_no_page calls clear_huge_page and that one calls flush_dcache_page (via clear_user_page), right? The same applies to copy_huge_page for COW.
You're right, these are redundant for ppc and ia64 (although ppc does have a comment moaning about the flush). Looks like it's just sh and ARM that need to do anything. Cheers, Will -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>