Re: [patch 2/5]thp: remove unnecessary tlb flush for mprotect
From: Andrea Arcangeli <hidden>
Date: 2011-11-10 15:23:17
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On Tue, Oct 25, 2011 at 10:59:25AM +0800, Shaohua Li wrote:
quoted hunk ↗ jump to hunk
change_protection() will do TLB flush later, don't need duplicate tlb flush. Signed-off-by: Shaohua Li <redacted> --- mm/huge_memory.c | 1 - 1 file changed, 1 deletion(-) Index: linux/mm/huge_memory.c ===================================================================--- linux.orig/mm/huge_memory.c 2011-10-24 19:24:31.000000000 +0800 +++ linux/mm/huge_memory.c 2011-10-24 19:25:10.000000000 +0800@@ -1079,7 +1079,6 @@ int change_huge_pmd(struct vm_area_struc entry = pmd_modify(entry, newprot); set_pmd_at(mm, addr, pmd, entry); spin_unlock(&vma->vm_mm->page_table_lock); - flush_tlb_range(vma, addr, addr + HPAGE_PMD_SIZE); ret = 1; } } else
Reviewed-by: Andrea Arcangeli <redacted> -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>