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ceph: writeback congestion control

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Set bdi congestion bit when amount of write data in flight exceeds adjustable
threshold.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Yehuda Sadeh
2009-12-18 13:51:57 -08:00
committed by Sage Weil
parent dbd646a851
commit 2baba25019
4 changed files with 105 additions and 2 deletions
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3
fs/ceph/super.h
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@@ -59,6 +59,7 @@ struct ceph_mount_args {
int wsize;
int rsize; /* max readahead */
int max_readdir; /* max readdir size */
int congestion_kb; /* max readdir size */
int osd_timeout;
char *snapdir_name; /* default ".snap" */
char *name;
@@ -136,6 +137,7 @@ struct ceph_client {
struct workqueue_struct *wb_wq;
struct workqueue_struct *pg_inv_wq;
struct workqueue_struct *trunc_wq;
atomic_long_t writeback_count;
struct backing_dev_info backing_dev_info;
@@ -143,6 +145,7 @@ struct ceph_client {
struct dentry *debugfs_monmap;
struct dentry *debugfs_mdsmap, *debugfs_osdmap;
struct dentry *debugfs_dir, *debugfs_dentry_lru, *debugfs_caps;
struct dentry *debugfs_congestion_kb;
struct dentry *debugfs_bdi;
#endif
};