Hi, there are issues with cifs share mounted via mount.cifs (with recent kernels): the first 'ls' on the dir where cifs share is mounted after the server becomes unavailable 1) hangs (can't be interrupted with ^C) and 2) lasts about 5 minutes. The first problem appears everywhere I tested (ubuntu 10.04 with any distributed kernel, ubuntu 12.04, fedora 17), but with old kernels (tested with ubuntu 10.04 2.6.32 and 2.6.35) 'ls' is uninterruptable but hangs only for about 25 seconds (which makes this problem really less complex for old kernels). And with new kernels (ubuntu 10.04 3.0, ubuntu 12.04 3.2, fedora 17 3.3) I'm facing very long hangs of 'ls' (the second problem). And many GUI applications (e.g. nautilus, firefox, gnome-panel,mc) that query that directory for some reason appears to act the same way as 'ls', so the system becomes unusable for 5(!) minutes. When the server (tested with samba 3.6, win2003) becomes unavailable nothing is written on the mounted directory, so I can't understand why this timeout is so big. Here is how I tested this:
# mount.cifs //fsrv/home /mnt "-ouser=test,dom=wg,soft" Password: # time ls /mnt Desktop Documents Program Files WINDOWS real 0m0.019s user 0m0.004s sys 0m0.012s # iptables -I OUTPUT -d 172.17.0.65 -j DROP # time ls /mnt # This 'ls' cannot be interrupted ls: cannot access /mnt: Host is down real 4m51.668s user 0m0.004s sys 0m0.016s # time ls /mnt # This 'ls' and all others after can be interrupted ls: cannot access /mnt: Host is down real 0m10.014s user 0m0.008s sys 0m0.004s I see these messages in syslog: kernel: [ 1625.552044] CIFS VFS: Server fsrv has not responded in 300 seconds. Reconnecting... kernel: [ 1655.509422] CIFS VFS: Unexpected lookup error -112 ... And I can not see any timeout options for mount.cifs (except acl timeout). So, the actual questions are: 1) is there a way to avoid these hangs (analog of 'intr'?) and 2) how can I reduce this unreachable-host timeout (analog of 'timeo'?)? Maybe there are some variables in the sources? Thanks. -- Best regards, Sergey Urushkin -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
