linux-kernel - [PATCH 6/7] free_pgtable

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Message-Id: <20070319200606.17168.61740.stgit@localhost.localdomain>
Date:	Mon, 19 Mar 2007 13:06:06 -0700
From:	Adam Litke <agl@...ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Adam Litke <agl@...ibm.com>,
	Arjan van de Ven <arjan@...radead.org>,
	William Lee Irwin III <wli@...omorphy.com>,
	Christoph Hellwig <hch@...radead.org>,
	Ken Chen <kenchen@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 6/7] free_pgtable_range for hugetlb


Signed-off-by: Adam Litke <agl@...ibm.com>
---

 fs/hugetlbfs/inode.c |    1 +
 mm/memory.c          |    6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 3de5d93..823a9e3 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -570,6 +570,7 @@ static const struct pagetable_operations_struct hugetlbfs_pagetable_ops = {
 	.pin_pages		= follow_hugetlb_page,
 	.unmap_page_range	= unmap_hugepage_range,
 	.change_protection	= hugetlb_change_protection,
+	.free_pgtable_range	= hugetlb_free_pgd_range,
 };
 
 static const struct inode_operations hugetlbfs_dir_inode_operations = {
diff --git a/mm/memory.c b/mm/memory.c
index a3bcaf3..d2f28e7 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -279,15 +279,15 @@ void free_pgtables(struct mmu_gather **tlb, struct vm_area_struct *vma,
 		anon_vma_unlink(vma);
 		unlink_file_vma(vma);
 
-		if (is_vm_hugetlb_page(vma)) {
-			hugetlb_free_pgd_range(tlb, addr, vma->vm_end,
+		if (has_pt_op(vma, free_pgtable_range)) {
+			pt_op(vma, free_pgtable_range)(tlb, addr, vma->vm_end,
 				floor, next? next->vm_start: ceiling);
 		} else {
 			/*
 			 * Optimization: gather nearby vmas into one call down
 			 */
 			while (next && next->vm_start <= vma->vm_end + PMD_SIZE
-			       && !is_vm_hugetlb_page(next)) {
+			       && !has_pt_op(next, free_pgtable_range)) {
 				vma = next;
 				next = vma->vm_next;
 				anon_vma_unlink(vma);
-
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