From: Pablo Neira Ayuso <pablo@netfilter•org>
To: Julian Anastasov <ja@ssi•bg>
Cc: guodeqing <geffrey.guo@huawei•com>,
wensong@linux-vs•org, horms@verge•net.au, kadlec@netfilter•org,
fw@strlen•de, davem@davemloft•net, kuba@kernel•org,
netdev@vger•kernel.org, lvs-devel@vger•kernel.org,
netfilter-devel@vger•kernel.org
Subject: Re: [PATCH,v2] ipvs: fix the connection sync failed in some cases
Date: Wed, 22 Jul 2020 01:23:27 +0200 [thread overview]
Message-ID: <20200721232327.GA6430@salvia> (raw)
In-Reply-To: <alpine.LFD.2.23.451.2007190837120.3463@ja.home.ssi.bg>
On Sun, Jul 19, 2020 at 09:08:39AM +0300, Julian Anastasov wrote:
>
> Hello,
>
> On Thu, 16 Jul 2020, guodeqing wrote:
>
> > The sync_thread_backup only checks sk_receive_queue is empty or not,
> > there is a situation which cannot sync the connection entries when
> > sk_receive_queue is empty and sk_rmem_alloc is larger than sk_rcvbuf,
> > the sync packets are dropped in __udp_enqueue_schedule_skb, this is
> > because the packets in reader_queue is not read, so the rmem is
> > not reclaimed.
> >
> > Here I add the check of whether the reader_queue of the udp sock is
> > empty or not to solve this problem.
> >
> > Fixes: 2276f58ac589 ("udp: use a separate rx queue for packet reception")
> > Reported-by: zhouxudong <zhouxudong8@huawei•com>
> > Signed-off-by: guodeqing <geffrey.guo@huawei•com>
>
> Looks good to me, thanks!
>
> Acked-by: Julian Anastasov <ja@ssi•bg>
>
> Simon, Pablo, this patch should be applied to the nf tree.
Applied, thanks.
> As the reader_queue appears in 4.13, this patch can be backported
> to 4.14, 4.19, 5.4, etc, they all have skb_queue_empty_lockless.
The Fixes: tag should help -stable maintainer pull this into the next
batch. Otherwise, feel free to drop a line to stable@vger•kernel.org
to request inclusion after this patch hits Linus' tree.
Thanks.
prev parent reply other threads:[~2020-07-21 23:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-16 8:12 [PATCH,v2] ipvs: fix the connection sync failed in some cases guodeqing
2020-07-19 6:08 ` Julian Anastasov
2020-07-21 23:23 ` Pablo Neira Ayuso [this message]
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