Re: [Xen-devel] race in vif-common.sh

["Andreas Kinzler" <ml-ak@xxxxxxxxx>]

On Thu, 27 Jul 2017 18:49:47 +0200, George Dunlap  
<George.Dunlap@xxxxxxxxxx> wrote:
> > Sorry, I think that this patch is just far to complicated. If you  
> > really want to keep the "iptables is working check" (lines 1-7 of  
> > function handle_iptable) then you should just move it inside the  
> > claim_lock "iptables" section and you won't need any -w option and no  
> > iptables_w() check.
> That assumes that vif-common.sh is the only thing on the system that  
> ever calls iptables (since even simply querying the tables wants to grab  
> the lock).  I’m afraid that’s not a very good assumption to make.
Hmm, I see your point but that boils down to a total different question  
that has nothing to do with Xen: should iptables have "-w" as a default?  
Somehow the current state (-w is not a default) seems to work for most  
people/cases.
Regards Andreas

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