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authorDavid Vrabel <[email protected]>2015-02-02 16:57:51 +0000
committerDavid S. Miller <[email protected]>2015-02-02 19:39:04 -0800
commit42b5212fee4f57907e9415b18fe19c13e65574bc (patch)
tree3fb44adcfd6de16f9e3ceddcf46d7a2c9c54532c /lib/net_utils.c
parent5a2e87b16875f9b83b7e9494cf1fce8e17dc764a (diff)
xen-netback: stop the guest rx thread after a fatal error
After commit e9d8b2c2968499c1f96563e6522c56958d5a1d0d (xen-netback: disable rogue vif in kthread context), a fatal (protocol) error would leave the guest Rx thread spinning, wasting CPU time. Commit ecf08d2dbb96d5a4b4bcc53a39e8d29cc8fef02e (xen-netback: reintroduce guest Rx stall detection) made this even worse by removing a cond_resched() from this path. Since a fatal error is non-recoverable, just allow the guest Rx thread to exit. This requires taking additional refs to the task so the thread exiting early is handled safely. Signed-off-by: David Vrabel <[email protected]> Reported-by: Julien Grall <[email protected]> Tested-by: Julien Grall <[email protected]> Acked-by: Wei Liu <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'lib/net_utils.c')
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