netdev - Re: [PATCH] sctp: Add RCU protection to assoc->transport_addr

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Message-ID: <50C0EAB5.3050303@gmail.com>
Date:	Thu, 06 Dec 2012 13:57:57 -0500
From:	Vlad Yasevich <vyasevich@...il.com>
To:	Thomas Graf <tgraf@...g.ch>
CC:	linux-sctp@...r.kernel.org, netdev@...r.kernel.org,
	Neil Horman <nhorman@...driver.com>
Subject: Re: [PATCH] sctp: Add RCU protection to assoc->transport_addr_list

On 12/06/2012 01:44 PM, Thomas Graf wrote:
> On 12/06/12 at 01:35pm, Vlad Yasevich wrote:
>> We may want to mark transports as dead sooner.  Probably right about
>> the time we pull them off the list.
>
> We mark it dead in sctp_transport_free() which is called at the
> end of sctp_assoc_rm_peer(). Do you want to mark it dead at the
> beginning of sctp_assoc_rm_peer() as well? (We still need to
> mark in sctp_transport_free() anyway).

Crud..  sctp_transport_free() is called directly in places...   Hmm...
the one in sctp_association_free() may need to be list_del_rcu()...

Ok, we can leave the dead handling the way it is..

-vlad

>
>> When displaying, we may want to
>> look at transport->dead, and skip them.  It will reduce the probability
>> that we would be looking at a transport that's about to go away.
>
> Agreed.
>

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