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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2014-05-05 23:42:24 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2014-07-10 18:35:14 +0200 |
| commit | 21ae5d7f95aa1a64f35b03c91f8714ced3ab61a9 (patch) | |
| tree | 9e5d90197118d8110c9a65f07f639c5eae000044 /drivers/block/drbd/drbd_int.h | |
| parent | drbd: improve throttling decisions of background resynchronisation (diff) | |
| download | linux-21ae5d7f95aa1a64f35b03c91f8714ced3ab61a9.tar.xz linux-21ae5d7f95aa1a64f35b03c91f8714ced3ab61a9.zip | |
drbd: track timing details of peer_requests
To be able to present timing details in debugfs,
we need to track preparation/submit times of peer requests.
Track peer request flags early,
before they are put on the epoch_entry lists.
Waiting for activity log transactions may be a major latency factor.
We want to be able to present the peer_request state accurately in
debugfs, and what it is waiting for.
Consistently mark/unmark peer requests with EE_CALL_AL_COMPLETE_IO.
Set it only *after* calling drbd_al_begin_io(),
clear it as soon as we call drbd_al_complete_io().
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block/drbd/drbd_int.h')
| -rw-r--r-- | drivers/block/drbd/drbd_int.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index 81f4af49b8ac..c7a409f3aaf8 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -422,6 +422,7 @@ struct drbd_peer_request { struct drbd_interval i; /* see comments on ee flag bits below */ unsigned long flags; + unsigned long submit_jif; union { u64 block_id; struct digest_info *digest; @@ -464,6 +465,17 @@ enum { /* Is set when net_conf had two_primaries set while creating this peer_req */ __EE_IN_INTERVAL_TREE, + + /* for debugfs: */ + /* has this been submitted, or does it still wait for something else? */ + __EE_SUBMITTED, + + /* this is/was a write request */ + __EE_WRITE, + + /* this originates from application on peer + * (not some resync or verify or other DRBD internal request) */ + __EE_APPLICATION, }; #define EE_CALL_AL_COMPLETE_IO (1<<__EE_CALL_AL_COMPLETE_IO) #define EE_MAY_SET_IN_SYNC (1<<__EE_MAY_SET_IN_SYNC) @@ -475,6 +487,9 @@ enum { #define EE_RESTART_REQUESTS (1<<__EE_RESTART_REQUESTS) #define EE_SEND_WRITE_ACK (1<<__EE_SEND_WRITE_ACK) #define EE_IN_INTERVAL_TREE (1<<__EE_IN_INTERVAL_TREE) +#define EE_SUBMITTED (1<<__EE_SUBMITTED) +#define EE_WRITE (1<<__EE_WRITE) +#define EE_APPLICATION (1<<__EE_APPLICATION) /* flag bits per device */ enum { |