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ceph: use list instead of rbtree to track cap flushes

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We don't have requirement of searching cap flush by TID. In most cases,
we just need to know TID of the oldest cap flush. List is ideal for this
usage.

Signed-off-by: Yan, Zheng <zyan@redhat.com>
This commit is contained in:
Yan, Zheng
2016-07-06 11:12:56 +08:00
committed by Ilya Dryomov
parent 3609404f8c
commit e4500b5e35
5 changed files with 56 additions and 118 deletions
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9
fs/ceph/super.h
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@@ -189,11 +189,8 @@ static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
struct ceph_cap_flush {
u64 tid;
int caps;
struct rb_node g_node; // global
union {
struct rb_node i_node; // inode
struct list_head list;
};
struct list_head g_list; // global
struct list_head i_list; // per inode
};
/*
@@ -310,7 +307,7 @@ struct ceph_inode_info {
* overlapping, pipelined cap flushes to the mds. we can probably
* reduce the tid to 8 bits if we're concerned about inode size. */
struct ceph_cap_flush *i_prealloc_cap_flush;
struct rb_root i_cap_flush_tree;
struct list_head i_cap_flush_list;
wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
unsigned long i_hold_caps_min; /* jiffies */
unsigned long i_hold_caps_max; /* jiffies */