From: Phil Sutter <p...@nwl.cc> Date: Wed, 29 Jul 2015 23:34:28 +0200
> On Wed, Jul 29, 2015 at 11:06:18PM +0200, Florian Westphal wrote: >> Phil Sutter <p...@nwl.cc> wrote: > [...] >> > +config DEFAULT_TX_QUEUE_LEN >> > + prompt "Default TX queue length (in packets)" if EXPERT >> > + int >> > + default 1000 # Ethernet wants good queues >> > + help >> > + Set the default value of tx_queue_len for newly created network >> > + interfaces. It is used by queueing disciplines to determine how many >> > + packets to keep in backlog before starting to drop new ones. >> > + >> > + The default value of 1000 packets is there for a very long time and >> > + in combination with GSO way too big. >> > + >> >> I can't see how this could be used in a meaningful way. >> >> No distro is going to touch this. >> >> I don't think sysctl value would help either. > > I just didn't want to introduce yet another magic value assignment. It's > merely a #define with a little flexibility and a subtle note that the > default should be changed attached. Like others have mentioned, fix the _REAL_ issue. Which is that there are devices (virtual or whatever) which don't want a qdisc attached no matter what. Flag those devices as such and adjust the qdisc attachment logic to check that new flag. Anything is better than hacking the queue len. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
