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Date: Mon, 12 Dec 2016 14:51:06 -0800
From: Cong Wang <xiyou.wangcong@...il.com>
To: Or Gerlitz <gerlitz.or@...il.com>
Cc: Daniel Borkmann <daniel@...earbox.net>,
Shahar Klein <shahark@...lanox.com>,
Linux Netdev List <netdev@...r.kernel.org>,
Roi Dayan <roid@...lanox.com>,
David Miller <davem@...emloft.net>,
Jiri Pirko <jiri@...lanox.com>,
John Fastabend <john.fastabend@...il.com>,
Hadar Hen Zion <hadarh@...lanox.com>
Subject: Re: Soft lockup in tc_classify
On Mon, Dec 12, 2016 at 1:18 PM, Or Gerlitz <gerlitz.or@...il.com> wrote:
> On Mon, Dec 12, 2016 at 3:28 PM, Daniel Borkmann <daniel@...earbox.net> wrote:
>
>> Note that there's still the RCU fix missing for the deletion race that
>> Cong will still send out, but you say that the only thing you do is to
>> add a single rule, but no other operation in involved during that test?
>
> What's missing to have the deletion race fixed? making a patch or
> testing to a patch which was sent?
If you think it would help for this problem, here is my patch rebased
on the latest net-next.
Again, I don't see how it could help this case yet, especially I don't
see how we could have a loop in this singly linked list.
View attachment "tc-filter-destroy.diff" of type "text/plain" (21977 bytes)
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