From 78365411b344df35a198b119133e6515c2dcfb9f Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Tue, 17 Dec 2013 01:29:34 -0800 Subject: bcache: Rework allocator reserves We need a reserve for allocating buckets for new btree nodes - and now that we've got multiple btrees, it really needs to be per btree. This reworks the reserves so we've got separate freelists for each reserve instead of watermarks, which seems to make things a bit cleaner, and it adds some code so that btree_split() can make sure the reserve is available before it starts. Signed-off-by: Kent Overstreet --- drivers/md/bcache/btree.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/md/bcache/btree.h') diff --git a/drivers/md/bcache/btree.h b/drivers/md/bcache/btree.h index d68af7442f70..4f0378ac1f7b 100644 --- a/drivers/md/bcache/btree.h +++ b/drivers/md/bcache/btree.h @@ -241,6 +241,9 @@ void bkey_put(struct cache_set *c, struct bkey *k); /* Recursing down the btree */ struct btree_op { + /* for waiting on btree reserve in btree_split() */ + wait_queue_t wait; + /* Btree level at which we start taking write locks */ short lock; @@ -250,6 +253,7 @@ struct btree_op { static inline void bch_btree_op_init(struct btree_op *op, int write_lock_level) { memset(op, 0, sizeof(struct btree_op)); + init_wait(&op->wait); op->lock = write_lock_level; } -- cgit v1.2.3-59-g8ed1b