Re: Fwd: aufs - Text file busy error

[James Burry]

   Hi JR. Yes, the RW branch is local ext2 on /dev/sdb1
   I will try the patch and let you know what happens. I did verify that the
   culprit was not NFS. I copied all of the NFS files locally (to an ext2
   filesystem) and the same error occurred (text file busy).

   On Thu, Feb 4, 2016 at 8:34 AM, <[1]sf...@users.sourceforge.net> wrote:

     James Burry:
     > All of the ro branches are mounted from an NFS share. Maybe the extra
     > latency associated with the NFS share has something to do with the
     issue.
     > The file which is causing the "text file busy" error for me is coming
     form
     > /proj/[2]5.113.79.8/.isoMounts/114_ThirdPartyLinuxDev.iso=ro, which is
     from
     > the NFS mount.
     It is very hard for me to reproduce the problem.
     I am trying repeatedly this test script.
     The result is always success.
     ----------------------------------------------------------------------
     cd /my/aufs
     NfsV3Ro=/local/nfsv3/server/dir
     sudo mount -o remount,rw $NfsV3Ro
     cat << EOF > $NfsV3Ro/a.sh
     #!/bin/sh
     echo success
     EOF
     ldd /bin/sh /bin/bash /bin/chmod |
     fgrep -v 'not a dynamic' |
     sort | uniq |
     #tee /dev/tty |
     awk '
     NF == 1 {sub(/:$/, ""); print}
     NF == 4 {print $3}
     NF == 2 {print $1}
     ' |
     xargs -ri cp -ipu --parent \{\} $NfsV3Ro/
     sudo mount -o remount,ro $NfsV3Ro
     stat -f . ../rw ../ro
     sudo chroot . sh -c "chmod +x a.sh && ./a.sh"
     ----------------------------------------------------------------------
     output:
     ----------------------------------------------------------------------
     (/proc/mounts)
     /dev/ram1 /tmp/nfsv3/tmp/ro ext2
     ro,relatime,errors=continue,user_xattr,acl 0 0
     localhost:/tmp/nfsv3/tmp/ro             /dev/shm/ro             nfs
     ro,relatime,vers=3,rsize=32768,wsize=32768,namlen=255,hard,proto=udp,timeo
     =11,retrans=3,mountaddr=127.0.0.1,mountvers=3,mountport=54974,mountproto=u
     dp,local_lock=none,addr=127.0.0.1 0 0
     /dev/ram0 /dev/shm/rw ext2 rw,relatime,errors=continue,user_xattr,acl 0 0
     none /dev/shm/u aufs rw,relatime,si=aa6735bb21eac00d 0 0
     (/sys/fs/aufs/si_*/br[01])
     /dev/shm/rw=rw
     /dev/shm/ro=ro
     (stat)
     Â  File: "."
     Â  Â  ID: 0Â  Â  Â  Â  Namelen: 242Â  Â  Â Type: UNKNOWN (0x61756673)
     Block size: 1024Â  Â  Â  Â Fundamental block size: 1024
     Blocks: Total: 7931Â  Â  Â  Â Free: 7868Â  Â  Â  Â Available: 7459
     Inodes: Total: 2048Â  Â  Â  Â Free: 2016
     Â  File: "../rw"
     Â  Â  ID: c931affb527b7092 Namelen: 255Â  Â  Â Type: ext2/ext3
     Block size: 1024Â  Â  Â  Â Fundamental block size: 1024
     Blocks: Total: 7931Â  Â  Â  Â Free: 7868Â  Â  Â  Â Available: 7459
     Inodes: Total: 2048Â  Â  Â  Â Free: 2016
     Â  File: "../ro"
     Â  Â  ID: 0Â  Â  Â  Â  Namelen: 255Â  Â  Â Type: nfs
     Block size: 32768Â  Â  Â  Fundamental block size: 32768
     Blocks: Total: 248Â  Â  Â  Â  Free: 145Â  Â  Â  Â  Available: 132
     Inodes: Total: 2048Â  Â  Â  Â Free: 1958
     (chroot)
     success
     ----------------------------------------------------------------------
     If you can, try the attached patch.
     It doesn't solve the problem, but helps finding where ETXTBSY is
     returned.
     J. R. Okajima

References

   1. mailto:sf...@users.sourceforge.net
   2. http://5.113.79.8/.isoMounts/114_ThirdPartyLinuxDev.iso=ro

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