Matthieu Moy <Matthieu.Moy@xxxxxxxxxxxxxxx> writes: > Hmm, even funnier: > > (head -c 196480 /dev/zero; sleep 0.25; head -c 196480 /dev/zero) | ssh localhost "wc -c" > 392960 > (head -c 196480 /dev/zero; sleep 0.2; head -c 196480 /dev/zero) | ssh localhost "wc -c" > 65536 Actually, just (sleep 0.1; head -c 196481 /dev/zero) | ssh localhost "wc -c" 65536 (sleep 0.2; head -c 196481 /dev/zero) | ssh localhost "wc -c" 196481 And interestingly, if I do echo 'sleep 1' > ~/.bashrc then (sleep 1.0; head -c 196481 /dev/zero) | ssh localhost "wc -c" 65536 (sleep 1.1; head -c 196481 /dev/zero) | ssh localhost "wc -c" 196481 Also, ensibm:~>(head -c 196480 /dev/zero; sleep 1.2; echo boom) | ssh localhost "wc -c" 196485 ensibm:~>(head -c 196480 /dev/zero; sleep 1.0; echo boom) | ssh localhost "wc -c" 65536 and, ensibm:~>rm ~/.bashrc ensibm:~>(head -c 196480 /dev/zero; sleep 1.0; echo boom) | ssh localhost "sleep 1; wc -c" 65536 ensibm:~>(head -c 196480 /dev/zero; sleep 1.2; echo boom) | ssh localhost "sleep 1; wc -c" 196485 and more precisely, ensibm:~>(head -c 196480 /dev/zero; sleep 1; echo boom) | ssh localhost "head -c 16383 | wc -c; sleep 2; wc -c" 16383 49153 ensibm:~>(head -c 196480 /dev/zero; sleep 1; echo boom) | ssh localhost "head -c 16384 | wc -c; sleep 2; wc -c" 16384 180101 The last one says that if strictly more than 196480 bytes are sent to ssh, _and_ if strictly less than 16384 bytes (= 16KiB) are consumed quickly, then the bug occurs. -- Matthieu Moy http://www-verimag.imag.fr/~moy/
