[PATCH 15/15] mm: remove install_page limit

Remove the INT_MAX/2 limit on remap_file_pages mapcount, which we added
in late 2.6.14: both 32-bit and 64-bit can now handle more, and are now
limited by their page tables.

Signed-off-by: Hugh Dickins <[email protected]>
---

 mm/fremap.c |    3 ---
 1 files changed, 3 deletions(-)

--- mm14/mm/fremap.c	2005-11-07 07:39:59.000000000 +0000
+++ mm15/mm/fremap.c	2005-11-09 14:40:44.000000000 +0000
@@ -87,9 +87,6 @@ int install_page(struct mm_struct *mm, s
 	size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
 	if (!page->mapping || page->index >= size)
 		goto unlock;
-	err = -ENOMEM;
-	if (page_mapcount(page) > INT_MAX/2)
-		goto unlock;
 
 	if (pte_none(*pte) || !zap_pte(mm, vma, addr, pte))
 		inc_mm_counter(mm, file_rss);
-
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---

• References:
  • [PATCH 00/15] mm: struct page lock and counts
    • From: Hugh Dickins <[email protected]>

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