Bug#1004139: ifenslave: Hotplugged interfaces sometimes not added to bond-master due to ifquery race condition

[Tiago Teresa Teodósio <ttt@ist.utl.pt>]

Hello,

We faced the same problem and found a solution, which consists in 
ensuring the sequential start up of the physical interfaces.

The interfaces(5) man page states:
"""
INTERFACE SELECTION
       Lines  beginning with the word "auto" are used to identify the 
physical
       interfaces to be brought up when ifup is run with the -a option.  
(This
       option  is  also  used by the system boot scripts, so interfaces 
marked
       "auto" are brought up at boot time.)  Physical interface  names  
should
       follow  the word "auto" on the same line.  There can be multiple 
"auto"
       stanzas.  ifup brings the named interfaces up in the order 
listed.
"""

After placing all physical interfaces after the word "auto" on the same 
line, we got a sequential setup of the physical interfaces which does 
not trigger the race condition anymore.

Best regards,
Tiago TT