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Hello,
I tried to replicate your problem, but couldn't.
When mounted as NFS3 over UDP:
- ----
root@lab1# echo foo > file1
root@lab1# cp file1 file2
root@lab2# cat file2
foo
root@lab1# time mv file1 file2
real 0m0.004s
user 0m0.000s
sys 0m0.000s
- ----
Same with NFS4 over TCP:
root@lab1# time mv file1 file2
real 0m0.005s
user 0m0.000s
sys 0m0.000s
Any special mount options or export options you might be using?
Regards,
/peter
Am 22.09.2015 um 15:19 schrieb Vincent Lefevre:
> At my lab, with NFS accounts, some machines have been upgraded to
> Debian 8, and I get regular hangs on these machines, while they
> never occurred before on the same machine and still never occur on
> a machine that is still under Debian 7.
>
> This happens with one of my scripts, which does a lot of "mv", and
> more often when the target has just been modified from another
> machine.
>
> A strace showed that it is the "rename" system call that hangs:
>
> 52026 0.000208 execve("/bin/mv", ["mv", "-v",
> "ssh/ssh-reconfigure", "/home/vlefevre/bin/ssh-reconfigu"...], [/*
> 112 vars */]) = 0 [...] 52026 0.000097
> rename("ssh/ssh-reconfigure",
> "/home/vlefevre/bin/ssh-reconfigure") = 0 52026 15.057725
> lseek(0, 0, SEEK_CUR) = -1 ESPIPE (Illegal seek) 52026
> 0.000189 close(0) = 0 52026 0.000175 close(1)
> = 0 52026 0.000093 munmap(0x7fd5a610b000, 4096) = 0 52026
> 0.000079 close(2) = 0 52026 0.000106 exit_group(0) = ?
> 52026 0.000307 +++ exited with 0 +++
>
> The NFS server isn't particularly loaded.
>
> Has anyone seen a problem like that? Where does it come from? And
> why does it affect only Debian 8 machines? A new bug?
>
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