On Thu, Oct 23, 2025 at 04:34:36PM +0200, Arsen Arsenović wrote:
> ~/tmp$ strace -e trace=ftruncate,fallocate nbdcopy --allocated
> --destination-is-zero --synchronous --request-size=32K
> copy-allocated-destination-zero-synch.in
> copy-allocated-destination-zero-synch.out
> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1971755,
> si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1971757,
> si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1971758,
> si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1971761,
> si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1971764,
> si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1971765,
> si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
> ftruncate(4, 0) = 0
> ftruncate(4, 33554432) = 0
> fallocate(4, 0, 0, 33554432) = 0
I was definitely expecting this one to fail with ENOTSUP or similar.
That's with the file copy-allocated-destination-zero-synch.out on ZFS?
Rich.
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