diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2012-05-08 16:51:57 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2012-05-10 11:01:59 +0200 |
| commit | b21d677ee9efe431a4acc653a8cfb12650e44cec (patch) | |
| tree | c85f6f806652eac1c8eaf2974a858973ff520cdf /cursor_left_ptr.xpm | |
| parent | c6db23958bdbeaba6877a0b16d9977b6b09f8744 (diff) | |
stream: fix ratelimiting corner case
This fixes inability to make progress in streaming if the quota is set
to less than the amount of data that an I/O operation has to write.
In this case, limit->dispatched + n will always be above the quota and,
due to the "goto retry" to recheck cancellation and allocation, streaming
will livelock.
This can be reproduced with "block_job_set_speed ide0-hd0 1b". Of course,
with this patch the requested limit will not be obeyed. That could be
done with another patch that caps is_allocated's n argument by the slice
quota.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'cursor_left_ptr.xpm')
0 files changed, 0 insertions, 0 deletions