Hello,
Is there some way to cancel a device remove operation? I have discovered that if I reboot that will cancel it, but that's not always possible. What I'm after is something the same as cancelling scrub. I keep running into situations where I want to pause a remove operation for speed reasons.
Since removing a device involves shrinking it to 0 size first (http://lxr.free-electrons.com/source/fs/btrfs/volumes.c#L1743), I guess you could just run "btrfs filesystem resize" in a loop as a workaround, shrinking it incrementally, and then remove at the end.
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