Comment 6 for bug 538580

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Charles Kerr (charlesk) wrote :

The freeze is being caused by slow file preallocation. You can ameliorate this by using a faster filesystem, or faster media, or by turning off preallocation.

If the filesystem doesn't support a fast allocation call like fallocate64(), and preallocation is set to "full", then preallocation is unavoidably going to be slow.