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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2014-04-01 23:53:30 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2014-07-10 18:35:10 +0200 |
| commit | e37d2438d8e5e4c1225cf94d45347fa207835447 (patch) | |
| tree | bd1756066196e9922c476f75759f4846455c2c63 /drivers/block/drbd/drbd_int.h | |
| parent | drbd: fix drbd_destroy_device reference count updates (diff) | |
| download | linux-e37d2438d8e5e4c1225cf94d45347fa207835447.tar.xz linux-e37d2438d8e5e4c1225cf94d45347fa207835447.zip | |
drbd: track meta data IO intent, start and submit time
For diagnostic purposes, track intent, start time
and latest submit time of meta data IO.
Move separate members from struct drbd_device
into the embeded struct drbd_md_io.
s/md_io_(page|in_use)/md_io.\1/
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 | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index d85f43c9ef56..3f8281bbea53 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -542,6 +542,11 @@ struct drbd_backing_dev { }; struct drbd_md_io { + struct page *page; + unsigned long start_jif; /* last call to drbd_md_get_buffer */ + unsigned long submit_jif; /* last _drbd_md_sync_page_io() submit */ + const char *current_use; + atomic_t in_use; unsigned int done; int error; }; @@ -795,9 +800,7 @@ struct drbd_device { atomic_t pp_in_use; /* allocated from page pool */ atomic_t pp_in_use_by_net; /* sendpage()d, still referenced by tcp */ wait_queue_head_t ee_wait; - struct page *md_io_page; /* one page buffer for md_io */ struct drbd_md_io md_io; - atomic_t md_io_in_use; /* protects the md_io, md_io_page and md_io_tmpp */ spinlock_t al_lock; wait_queue_head_t al_wait; struct lru_cache *act_log; /* activity log */ @@ -1336,7 +1339,7 @@ extern void resume_next_sg(struct drbd_device *device); extern void suspend_other_sg(struct drbd_device *device); extern int drbd_resync_finished(struct drbd_device *device); /* maybe rather drbd_main.c ? */ -extern void *drbd_md_get_buffer(struct drbd_device *device); +extern void *drbd_md_get_buffer(struct drbd_device *device, const char *intent); extern void drbd_md_put_buffer(struct drbd_device *device); extern int drbd_md_sync_page_io(struct drbd_device *device, struct drbd_backing_dev *bdev, sector_t sector, int rw); |