Hi Dave,
On 01/14/2014 11:27 PM, David Sterba wrote:
On Thu, Jan 09, 2014 at 02:52:27PM +0000, Chris Mason wrote:
You may need to upgrade the kernel to get new features offered by a
new userspace, but I think we should absolutely not be changing
userspace in a way that makes it incompatible with older kernels.
I'd really prefer that we maintain compatibility with the older kernels.
Heavy btrfs usage is going to want a newer kernel anyway, but this is an
important policy to keep in place for the future.
I agree.
Especially since Wang went to the trouble of making the patch, I'd
rather take it.
What do you think about adding #ifdef's around the code? That way we'll
know that's for backwards compatibility only and up to what kernel
version. It will be easier to remove it in the far future.
Sounds a good idea, would you describe it more specific so that
i can give a v2.^_^
Thanks，
Wang
david
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