On Wed, Feb 06, 2019 at 10:35:04AM -0800, Matthew Wilcox wrote: > > Admittedly, I'm coming in late to this conversation, but did I miss the > > portion where that alternative was ruled out? > > That's my preferred option too, but the preponderance of opinion leans > towards "We can't give people a way to make files un-truncatable". I haven't heard an explanation why blocking ftruncate is worse than giving people a way to break RDMA using process by calling ftruncate?? Isn't it exactly the same argument the other way? Jason