NFS readdir change break fully cached nfs root

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About

  • Kernel version: 2.6.37-rc1
  • Bug 23552
  • Reported by: Rafael J. Wysocki (November 22, 2010)
  • Closed by: Trond Myklebust (November 22, 2010)


Symptoms

  • nfsroot systems don't boot
  • infinite readdir loops
  • ls occasionally returns empty when directory is not empty


Resolution 

commit 8cd51a0ccd1beda4482507769887c0be9d70f8c1
Author: Trond Myklebust <Trond.Myklebust@netapp.com>
Date:   Mon Nov 15 20:26:22 2010 -0500

    NFS: Fix a couple of regressions in readdir.
    
    Fix up the issue that array->eof_index needs to be able to be set
    even if array->size == 0.
    
    Ensure that we catch all important memory allocation error conditions
    and/or kmap() failures.
    
    Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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