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bcache: Minor btree cache fix

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Signed-off-by: Kent Overstreet <kmo@daterainc.com>
This commit is contained in:
Kent Overstreet 2013-12-10 13:24:26 -08:00
parent 5775e2133d
commit b0f32a56f2
1 changed files with 3 additions and 7 deletions
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10
drivers/md/bcache/btree.c
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@ -714,14 +714,10 @@ static unsigned long bch_mca_scan(struct shrinker *shrink,
}
}
/*
* Can happen right when we first start up, before we've read in any
* btree nodes
*/
if (list_empty(&c->btree_cache))
goto out;
for (i = 0; (nr--) && i < c->bucket_cache_used; i++) {
if (list_empty(&c->btree_cache))
goto out;
b = list_first_entry(&c->btree_cache, struct btree, list);
list_rotate_left(&c->btree_cache);