block_rsv_check EAGAIN vs ENOSPC...

[Daniel J Blueman <daniel@xxxxxxxxx>]

With 3.4-rc4 under certain workloads, I see btrfs_block_rsv_check
return -ENOSPC.

Since btrfs_block_rsv_check can only return -ENOSPC or 0,
relocation.c:3816 checks for -EAGAIN, which is either redundant or
should be -ENOSPC, which I initially suspected.

Let me know which the behaviour should be and I'll get a patch tested and sent.

Thanks,
  Daniel
-- 
Daniel J Blueman
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