Re: [PATCH] net: orphan queued skbs if device tx can stall

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

On Sun, Apr 08, 2012 at 08:13:25PM +0300, Michael S. Tsirkin wrote:
> commit 0110d6f22f392f976e84ab49da1b42f85b64a3c5
> tun: orphan an skb on tx
> Fixed a configuration where skbs get queued
> at the tun device forever, blocking senders.
> 
> However this fix isn't waterproof:
> userspace can control whether the interface
> is stopped, and if it is, packets
> get queued in the qdisc, again potentially forever.
> 
> Complete the fix by setting a private flag and orphaning
> at the qdisc level.
> 
> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>

1) Doesn't this break local UDP push-back?
2) Isn't the stall a bug in the backend and isn't this just
papering over that?

Cheers,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Linux Kernel Discussion]     [Ethernet Bridging]     [Linux Wireless Networking]     [Linux Bluetooth Networking]     [Linux Networking Users]     [VLAN]     [Git]     [IETF Annouce]     [Linux Assembly]     [Security]     [Bugtraq]     [Photo]     [Singles Social Networking]     [Yosemite Information]     [MIPS Linux]     [ARM Linux Kernel]     [ARM Linux]     [Linux Virtualization]     [Linux Security]     [Linux IDE]     [Linux RAID]     [Linux SCSI]     [Free Dating]

Add to Google Powered by Linux