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authorAdam Litke <agl@us.ibm.com>2007-10-16 04:26:25 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 12:43:03 -0400
commitaf767cbdd78f293485c294113885d95e7f1da123 (patch)
tree934d5c6180e808ee2062d8d2ef2ed758c452286d /mm/hugetlb.c
parent63b4613c3f0d4b724ba259dc6c201bb68b884e1a (diff)
hugetlb: fix dynamic pool resize failure case
When gather_surplus_pages() fails to allocate enough huge pages to satisfy the requested reservation, it frees what it did allocate back to the buddy allocator. put_page() should be called instead of update_and_free_page() to ensure that pool counters are updated as appropriate and the page's refcount is decremented. Signed-off-by: Adam Litke <agl@us.ibm.com> Acked-by: Dave Hansen <haveblue@us.ibm.com> Cc: David Gibson <hermes@gibson.dropbear.id.au> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Ken Chen <kenchen@google.com> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
-rw-r--r--mm/hugetlb.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 82efecbab96..ae2959bb59c 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -302,8 +302,17 @@ free:
302 list_del(&page->lru); 302 list_del(&page->lru);
303 if ((--needed) >= 0) 303 if ((--needed) >= 0)
304 enqueue_huge_page(page); 304 enqueue_huge_page(page);
305 else 305 else {
306 update_and_free_page(page); 306 /*
307 * Decrement the refcount and free the page using its
308 * destructor. This must be done with hugetlb_lock
309 * unlocked which is safe because free_huge_page takes
310 * hugetlb_lock before deciding how to free the page.
311 */
312 spin_unlock(&hugetlb_lock);
313 put_page(page);
314 spin_lock(&hugetlb_lock);
315 }
307 } 316 }
308 317
309 return ret; 318 return ret;