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authorBalbir Singh <balbir@linux.vnet.ibm.com>2008-02-07 00:14:05 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 08:42:19 -0800
commit35c754d79f4da80d5e8972f6403dd26f7962fd88 (patch)
tree5e497fd0ac832b5c832044d0267170d7144e1a0e /mm/swap_state.c
parent044d66c1d2b1c5aa50b4d6d68c21c6c93dd678da (diff)
downloadvexpress-lsk-35c754d79f4da80d5e8972f6403dd26f7962fd88.tar.gz
memory controller BUG_ON()
Move mem_controller_cache_charge() above radix_tree_preload(). radix_tree_preload() disables preemption, even though the gfp_mask passed contains __GFP_WAIT, we cannot really do __GFP_WAIT allocations, thus we hit a BUG_ON() in kmem_cache_alloc(). This patch moves mem_controller_cache_charge() to above radix_tree_preload() for cache charging. Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swap_state.c')
-rw-r--r--mm/swap_state.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/mm/swap_state.c b/mm/swap_state.c
index 581b609e748..6ce0669aced 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -75,13 +75,13 @@ int add_to_swap_cache(struct page *page, swp_entry_t entry, gfp_t gfp_mask)
BUG_ON(!PageLocked(page));
BUG_ON(PageSwapCache(page));
BUG_ON(PagePrivate(page));
- error = radix_tree_preload(gfp_mask);
- if (!error) {
- error = mem_cgroup_cache_charge(page, current->mm, gfp_mask);
- if (error)
- goto out;
+ error = mem_cgroup_cache_charge(page, current->mm, gfp_mask);
+ if (error)
+ goto out;
+ error = radix_tree_preload(gfp_mask);
+ if (!error) {
write_lock_irq(&swapper_space.tree_lock);
error = radix_tree_insert(&swapper_space.page_tree,
entry.val, page);
@@ -97,7 +97,8 @@ int add_to_swap_cache(struct page *page, swp_entry_t entry, gfp_t gfp_mask)
}
write_unlock_irq(&swapper_space.tree_lock);
radix_tree_preload_end();
- }
+ } else
+ mem_cgroup_uncharge_page(page);
out:
return error;
}