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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Missing information as noted in
https://bugs.launchpad.net/linux/+bug/1225494/comments/3 .

** No longer affects: linux (Debian)

** Also affects: linux (Debian)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1225494

Title:
  WARNING: CPU: 2 PID: 24776 at
  /build/buildd/linux-3.11.0/fs/nfs/idmap.c:660
  nfs_idmap_legacy_upcall+0x195/0x1b0 [nfsv4]()

Status in The Linux Kernel:
  New
Status in “linux” package in Debian:
  New

Bug description:
  I encountered an kernel trace regarding NFS running 3.11.0-7-generic
  #13-Ubuntu SMP Tue Sep 10 20:55:38 UTC 2013 x86_64 GNU/Linux under
  Debian Squeeze 6.0.7 amd64 on an Opteron barebone.

  This server is an NFS client using cachefilesd.

  The NFS server is Debian Squeeze 6.0.7 amd64 running
  3.2.0-0.bpo.4-amd64 #1 SMP Debian 3.2.46-1~bpo60+1 x86_64 GNU/Linux
  and nfs-kernel-server on an Opteron barebone.

  No kerberos is in use.

  To get things up and running for 700+ user ids, i configured the
  following on the client, using trial and error, to have the correct
  user ids on the NFS mount:

  echo N > /sys/module/nfs/parameters/nfs4_disable_idmapping
  kernel.keys.root_maxbytes = 100000
  kernel.keys.root_maxkeys = 1000
  kernel.keys.maxbytes = 100000
  kernel.keys.maxkeys = 1000

  The trace is attached.

  Thanks,
  Raoul

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