tree 90fa9f8d88a1c35a525a0b51cfa7c229b35b935b
parent b939bf93b1e1571ab1d396e956d5b2775720e3c5
author Jens Axboe <axboe@fb.com> 1421343552 -0700
committer Mohamad Ayyash <mkayyash@google.com> 1425693493 -0800

Improve rate limiting

If we have pending IO, we should commit it before going to sleep,
not just wait for IO that has already been issued.

Also improve the delay functions to return the time spent, so
that users don't have to track tha separately if they care about
the precision.

Signed-off-by: Jens Axboe <axboe@fb.com>