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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/filemap.c
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@@ -460,14 +460,12 @@ int filemap_write_and_wait_range(struct address_space *mapping,
int add_to_page_cache(struct page *page, struct address_space *mapping,
pgoff_t offset, gfp_t gfp_mask)
{
int error = radix_tree_preload(gfp_mask & ~__GFP_HIGHMEM);
int error = mem_cgroup_cache_charge(page, current->mm, gfp_mask);
if (error)
goto out;
error = radix_tree_preload(gfp_mask & ~__GFP_HIGHMEM);
if (error == 0) {
error = mem_cgroup_cache_charge(page, current->mm, gfp_mask);
if (error)
goto out;
write_lock_irq(&mapping->tree_lock);
error = radix_tree_insert(&mapping->page_tree, offset, page);
if (!error) {
@@ -482,7 +480,8 @@ int add_to_page_cache(struct page *page, struct address_space *mapping,
write_unlock_irq(&mapping->tree_lock);
radix_tree_preload_end();
}
} else
mem_cgroup_uncharge_page(page);
out:
return error;
}