kern/95665: [if_tun] "ping: sendto: No buffer space available" with TUN interface (easily reproducable with test program)

[Gleb Smirnoff]

  Bruce,

On Fri, Sep 29, 2006 at 12:30:29PM +0100, Bruce M. Simpson wrote:
B> >You kept the PR in feedback state for 11 hours, and then you
B> >suspend the PR! Are you expecting our users to reply immediately?
B> >  
B> The user responded saying they could not reproduce the problem further 
B> as they no longer had a FreeBSD system installed.

Ohh, people again aren't adding neither bug-followup@ nor freebsd-gnats-submit@
to the Cc of their replies.

B> Despite my best 
B> efforts I could not reproduce the problem with the test case given on 
B> RELENG_6_1 and HEAD, as I documented in the PR.

The subject problem has been reported several times on the mailing
lists, and I've also observed it myself in the past. There is definitely
a bug that brings tun(4) to a state when nothing can be transmitted.

B> Apologies for any confusion caused.

No problem.

-- 
Totus tuus, Glebius.
GLEBIUS-RIPN GLEB-RIPE