linux-kernel - Re: INFO: rcu detected stall in xfrm_hash

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Message-Id: <20181210.095856.580441946779980596.davem@davemloft.net>
Date:   Mon, 10 Dec 2018 09:58:56 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     fw@...len.de
Cc:     syzbot+592df0494801b6648ec6@...kaller.appspotmail.com,
        herbert@...dor.apana.org.au, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, steffen.klassert@...unet.com,
        syzkaller-bugs@...glegroups.com
Subject: Re: INFO: rcu detected stall in xfrm_hash_rebuild

From: Florian Westphal <fw@...len.de>
Date: Mon, 10 Dec 2018 13:47:24 +0100

> After recent tree conversion, we could probably make the exact policies
> part of the 'inexact tree' (which would be renamed to 'policy tree' or
> some such).
> 
> Special-casing the exact policies made a lot of sense when we had
> a single list for the inexact policies (to keep its length down).
> 
> But now I think we could try to unify all of this and only maintain
> the existing tree-based storage.
> 
> Would also remove the need to do lookups in two different
> data structures (bydst-hash-then-inexact-tree).
> 
> What do you think?

I think this makes a lot of sense.