On Fri, Oct 16, 2015 at 07:49:19AM -0400, Chris Mason wrote: > > Yes, that would be my preference. I'd also like to understand what > > exactly btrfs does in fallocate. > > For which part? The answer changes based on how many references there > are to a given fallocated region. Both cases. With btrfs allocating new block on every write how do you avoid that ENOSPC? Is there a unassigned block preallocation that's made persistent in some way? -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html