I've upgraded cygwin recently (from a much older version) and am
encountering a new problem on all my Win10/WIn11 machines.
With openssh and pv installed on cygwin (3.4.7-1):
dd if=/dev/zero bs=1 count=65536 | ssh localhost 'cat > /dev/null' #
works
dd if=/dev/zero bs=1 count=65537 | ssh localhost 'cat > /dev/null' #
stalls (and anything larger)
dd if=/dev/zero bs=1 count=65537 | ssh localhost 'pv > /dev/null' #
replace 'cat' with 'pv' and it works
This happens with or without Windows Firewall enabled, with any input >
64k, and also remotely from Linux.
It also seems to affect scp to cygwin which stalls if the file is >= 64k
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