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ceph: use rbtree for mds requests

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The rbtree is a more appropriate data structure than a radix_tree.  It
avoids extra memory usage and simplifies the code.

It also fixes a bug where the debugfs 'mdsc' file wasn't including the
most recent mds request.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2010-02-15 12:08:46 -08:00
parent 91e45ce389
commit 44ca18f268
3 changed files with 97 additions and 69 deletions
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13
fs/ceph/debugfs.c
View file

@ -142,21 +142,16 @@ static int monc_show(struct seq_file *s, void *p)
static int mdsc_show(struct seq_file *s, void *p)
{
struct ceph_client *client = s->private;
struct ceph_mds_request *req;
u64 nexttid = 0;
int got;
struct ceph_mds_client *mdsc = &client->mdsc;
struct ceph_mds_request *req;
struct rb_node *rp;
int pathlen;
u64 pathbase;
char *path;
mutex_lock(&mdsc->mutex);
while (nexttid < mdsc->last_tid) {
got = radix_tree_gang_lookup(&mdsc->request_tree,
(void **)&req, nexttid, 1);
if (got == 0)
break;
nexttid = req->r_tid + 1;
for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
req = rb_entry(rp, struct ceph_mds_request, r_node);
if (req->r_request)
seq_printf(s, "%lld\tmds%d\t", req->r_tid, req->r_mds);