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)
7.3
Unspecified Unspecified
unspecified Severity unspecified
: rc
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Assigned To: Dr. David Alan Gilbert
xianwang
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Reported: 2015-12-11 14:01 EST by Dr. David Alan Gilbert
Modified: 2017-01-12 02:16 EST (History)
7 users (show)

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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

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