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| author | Chen, Kenneth W <kenneth.w.chen@intel.com> | 2006-12-06 20:31:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 08:39:20 -0800 |
| commit | c0a499c2c42992cff097b38be29d2ba60d2fd99a (patch) | |
| tree | e02e80f190eb6f4eedb2c991d92840137505f8f8 /mm/hugetlb.c | |
| parent | 0798e5193cd70f6c867ec176d7730589f944c627 (diff) | |
| download | linux-c0a499c2c42992cff097b38be29d2ba60d2fd99a.tar.bz2 | |
[PATCH] __unmap_hugepage_range(): add comment
Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index a088f593a807..f7355bf2f285 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -365,6 +365,11 @@ void __unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start, pte_t pte; struct page *page; struct page *tmp; + /* + * A page gathering list, protected by per file i_mmap_lock. The + * lock is used to avoid list corruption from multiple unmapping + * of the same page since we are using page->lru. + */ LIST_HEAD(page_list); WARN_ON(!is_vm_hugetlb_page(vma)); |