> A guest can wait indefinitely in wait_for_response() for the host to > send either a rescind message or a packet completion. If the > host does not send either, the guest can remain blocked with no > diagnostic indicating a reason. > This was observed during a guest kernel upgrade in which the > host-side application handling the PCI channel faulted, causing the > guest to never receive the completion request. > Add a warning in wait_for_response() when the wait exceeds > a timeout so that such a hang is visible in the guest's kernel log > and can be correlated with host-side state. > > Suggested-by: Hamza Mahfooz <[email protected]> > Suggested-by: Naman Jain <[email protected]> > Suggested-by: Michael Kelley <[email protected]> > Signed-off-by: Sahil Chandna <[email protected]>
Sashiko has reviewed this patch and found no issues. It looks great! -- Sashiko AI review ยท https://sashiko.dev/#/patchset/[email protected]?part=1
