[arch-releng] regression with race condition on pxe boot with nbd

Christian Hesse list at eworm.de
Tue May 24 12:35:42 UTC 2016

Hello everybody,

with my latest builds I see a regression on pxe boot with nbd. About 50% of
boots fail. The nbd module is loaded, nbd-client attaches the device, but
mount fails:

mount: you must specify the filesystem type
ERROR; Failed to mount '/dev/nbd0'
   Falling back to interactive prompt
   You can try to fix the problem manually, log out when you are finished

A simple mount allows to continue boot:

mount /dev/nbd0 /run/archiso/bootmnt/

My guess is that linux 4.6 introduced a race condition. Any idea how to fix
or handle this?
main(a){char*c=/*    Schoene Gruesse                         */"B?IJj;MEH"
"CX:;",b;for(a/*    Best regards             my address:    */=0;b=c[a++];)
putchar(b-1/(/*    Chris            cc -ox -xc - && ./x    */b/42*2-3)*42);}
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