[PATCH] Drop page table lock before calling migrate_page_add()
migrate_page_add cannot be called with a spinlock held (calls
isolate_lru_page which calles schedule_on_each_cpu). Drop ptl lock in
check_pte_range before calling migrate_page_add().
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 44b9d69..4c0510e 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -259,8 +259,11 @@
if (flags & MPOL_MF_STATS)
gather_stats(page, private);
- else if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL))
+ else if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) {
+ spin_unlock(ptl);
migrate_page_add(vma, page, private, flags);
+ spin_lock(ptl);
+ }
else
break;
} while (pte++, addr += PAGE_SIZE, addr != end);