On Thu, 11 Jun 2009, Chris Mason wrote: > > Existing filesystems will be upgraded to the new format on the first > mount. All of your old data will still be there and still work > properly, but I strongly recommend a full backup before going to the new > code. Auugh. This is horrible. I just screwed up my system by booting a kernel on this: it worked beatifully, but due to other reasons I then wanted to bisect a totally unrelated issue. While having _totally_ forgotten about this issue, even if I was technically aware of it. .. so I installed a new kernel, and now it won't boot due to "couldn't mount because of unsupported optional features (1)". In fact, I have no kernel available on that system that will boot, since my normal "safe" fall-back kernels are all distro kernels that can't boot this either. Ok, so I'll end up booting from a USB stick, and it will all work out in the end, but this does essentially make it entirely impossible to do any bisection on any btrfs system. Double-plus-ungood. Linus -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
