[ovs-dev] [PATCH] ovs-vswitchd: Fix high cpu utilization when acquire idl lock fails.

Ben Pfaff blp at nicira.com
Wed Oct 8 23:13:26 UTC 2014


On Wed, Oct 08, 2014 at 03:19:29PM -0700, Alex Wang wrote:
> When ovs-vswitchd fails to acquire the ovsdb idl lock (either due to
> contention or due to invalid database path), ovs-vswitchd will spin
> on the global connectivity sequence number and consume 100% cpu.
> This is in that the local copy is different to the global sequence
> number and never updated when ovsdb idl is not locked.
> 
> To fix this issue, this commit makes ovs-vswitchd not checking the
> global connectivity sequence number in that situation.
> 
> Signed-off-by: Alex Wang <alexw at nicira.com>

Do we need the new variable?  Can we just call ovsdb_idl_has_lock()
from status_update_wait?



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