Bug 1290884 - migration/RDMA: Race condition in sending control messages
migration/RDMA: Race condition in sending control messages
Status: NEW
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm-rhev (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
: rc
: ---
Assigned To: Dr. David Alan Gilbert
Yumei Huang
Depends On:
  Show dependency treegraph
Reported: 2015-12-11 14:01 EST by Dr. David Alan Gilbert
Modified: 2018-06-21 13:55 EDT (History)
7 users (show)

See Also:
Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of:
Last Closed:
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

  None (edit)
Description Dr. David Alan Gilbert 2015-12-11 14:01:55 EST
Description of problem:
There's a race in qemu_rdma_post_send_control, where the reply from the destination might arrive before the signalled ack sending the 'ready'; when this happens wait_for_wrid loses the reply from the destination because it's only interested in waiting for the ack.

Version-Release number of selected component (if applicable):
still in 7.2 and upstream 2.5

How reproducible:
Only reproduced in my world where I'm sending a heck of a lot more control data, but I think it's a valid race

Steps to Reproduce:

Actual results:

Expected results:

Additional info:

Note You need to log in before you can comment on or make changes to this bug.