Hi folks, With the conversion of XFS to use the generic per-cpu superblocks, I overlooked the fact that the update batch size is important to the accuracy of the comparison function. Using different batch sizes means percpu_counter_compare() doesn't detect when it should fall back to percpu_counter_sum() for accuracy correctly, resulting in counter comparisons being inaccurate. This leads to problems with zero threshold detection in XFS.
To fix, add __percpu_counter_compare() to take a caller supplied batch size. This fixes the XFS regression introduced in 4.1-rc1. -Dave. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
