Re: TCP/IP connections sometimes stop retransmitting packets (in nested virtualization case)

2021-10-18 Thread Eric Dumazet
On 10/17/21 3:50 AM, Maxim Levitsky wrote: > Hi! > > This is a follow up mail to my mail about NFS client deadlock I was trying to > debug last week: > https://lore.kernel.org/all/e10b46b04fe4427fa50901dda71fb5f5a26af33e.ca...@redhat.com/T/#u > > I strongly believe now that this is not

Re: [Qemu-devel] [net-next RFC PATCH 4/7] tuntap: multiqueue support

2011-08-12 Thread Eric Dumazet
Le vendredi 12 août 2011 à 09:55 +0800, Jason Wang a écrit : + rxq = skb_get_rxhash(skb); + if (rxq) { + tfile = rcu_dereference(tun-tfiles[rxq % numqueues]); + if (tfile) + goto out; + } You can avoid an expensive divide with

[Qemu-devel] Re: [PATCH] tun: orphan an skb on tx

2010-04-13 Thread Eric Dumazet
Le mardi 13 avril 2010 à 17:36 +0200, Jan Kiszka a écrit : Michael S. Tsirkin wrote: The following situation was observed in the field: tap1 sends packets, tap2 does not consume them, as a result tap1 can not be closed. And before that, tap1 may not be able to send further packets to