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Re: [Xen-devel] [PATCH 1/5] hotplug/linux: Use the '-w' wait flag when calling iptables

To: Sylvain Munaut <s.munaut@xxxxxxxxxxxxxxxxxxxx>
From: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Date: Tue, 24 Jan 2017 17:32:16 +0000
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxx
Delivery-date: Tue, 24 Jan 2017 17:32:22 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

Sylvain Munaut writes ("[PATCH 1/5] hotplug/linux: Use the '-w' wait flag when 
calling iptables"):
> Without this, several hotplug script instances might attempt to run at
> the same rime and one will fail because it can't get the xtables lock !
> 
> The 'frob_iptables' is protected by a lock, but not the availability
> check and this is also needed in case other things on the servers are
> using the xtable lock.

Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>

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References:
- [Xen-devel] [PATCH 0/5] Various improvements for the VIF linux hotplug scripts
  - From: Sylvain Munaut
- [Xen-devel] [PATCH 1/5] hotplug/linux: Use the '-w' wait flag when calling iptables
  - From: Sylvain Munaut

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