nfs mmap adventure (was: 2.6.23-mm1)

I get funny SIGBUS' like so:

fault
  if (->page_mkwrite() < 0)
    nfs_vm_page_mkwrite()
      nfs_write_begin()
        nfs_flush_incompatible()
          nfs_wb_page()
            nfs_wb_page_priority()
              nfs_sync_mapping_wait()
                nfs_wait_on_request_locked()
                  nfs_wait_on_request()
                    nfs_wait_bit_interruptible()
                      return -ERESTARTSYS
    SIGBUS

trying to figure out what to do about this...

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Follow-Ups:
- Re: nfs mmap adventure (was: 2.6.23-mm1)
  - From: Trond Myklebust <[email protected]>

References:
- 2.6.23-mm1
  - From: Andrew Morton <[email protected]>

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