linux-toradex.git/drivers/block/drbd/drbd_debugfs.c, branch v4.4.93

make simple_positive() public

2015-06-23T22:02:01+00:00

Signed-off-by: Al Viro

VFS: assorted weird filesystems: d_inode() annotations

2015-04-15T19:06:58+00:00

Signed-off-by: David Howells 
Signed-off-by: Al Viro

kill f_dentry uses

2014-11-19T18:01:25+00:00

Signed-off-by: Al Viro

drbd: Remove superfluous newline from "resync_extents" debugfs entry.

2014-09-11T14:41:29+00:00

See "drbd/resources/*/volumes/*/resync_extents".

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg 
Signed-off-by: Jens Axboe

drbd: debugfs: add per device data_gen_id

2014-07-10T16:35:21+00:00

The data generation identifiers used to be exposed via sysfs
at /sys/block/drbdX/drbd/meta_data/data_gen_id (out-of-tree),
for advanced policy scripting.
Bring that information over to debugfs.

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: debugfs: add per connection oldest requests

2014-07-10T16:35:20+00:00

Information of former /sys/block/drbdX/drbd/oldest_requests
is already with higher detail in these files:
 debugfs/drbd/resource/$name/in_flight_summary,
 debugfs/drbd/resource/$name/volumes/$vnr/oldest_requests

This patch adds
 debugfs/drbd/resource/$name/connections/peer/oldest_requests

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: debugfs: add version tag to debugfs files

2014-07-10T16:35:19+00:00

Make the first line of debugfs files a version number,
starting now with "v: 0".

If we change content of presentation, we will bump that.
Monitoring or diagnostic scritps that may parse these files
can then easily know when they need to be reviewed.

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: debugfs: add per volume oldest_requests

2014-07-10T16:35:19+00:00

Show oldest requests
 * pending master bio completion and,
 * if different, local disk bio completion.

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: debugfs: add callback_history

2014-07-10T16:35:18+00:00

Add a per-connection worker thread callback_history
with timing details, call site and callback function.

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: debugfs: Add in_flight_summary

2014-07-10T16:35:17+00:00

* Add details about pending meta data operations to in_flight_summary.

* Report number of requests waiting for activity log transactions.

* timing details of peer_requests to in_flight_summary.

* FLUSH details
  DRBD devides the incoming request stream into "epochs",
  in which peers are allowed to re-order writes independendly.

  These epochs are separated by P_BARRIER on the replication link.
  Such barrier packets, depending on configuration, may cause
  the receiving side to drain the lower level device request queues
  and call blkdev_issue_flush().

  This is known to be an other major source of latency in DRBD.

  Track timing details of calls to blkdev_issue_flush(),
  and add them to in_flight_summary.

* data socket stats
  To be able to diagnose bottlenecks and root causes of "slow" IO on DRBD,
  it is useful to see network buffer stats along with the timing details of
  requests, peer requests, and meta data IO.

* pending bitmap IO timing details to in_flight_summary.

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg