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memory controller BUG_ON()

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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>
This commit is contained in:
Balbir Singh
2008-02-07 00:14:05 -08:00
committed by Linus Torvalds
parent 044d66c1d2
commit 35c754d79f
2 changed files with 13 additions and 13 deletions
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13
mm/swap_state.c
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@@ -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 = mem_cgroup_cache_charge(page, current->mm, gfp_mask);
if (error)
goto out;
error = radix_tree_preload(gfp_mask);
if (!error) {
error = mem_cgroup_cache_charge(page, current->mm, gfp_mask);
if (error)
goto out;
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;
}