Christoph Hellwig <hch@xxxxxxxxxxxxx> writes: > On Tue, Jan 17, 2017 at 09:54:27AM -0500, Jeff Moyer wrote: >> I spoke with Dave before the holidays, and he indicated that >> PMEM_IMMUTABLE would be an acceptable solution to allowing applications >> to flush data completely from userspace. I know this subject has been >> beaten to death, but would you mind just summarizing your opinion on >> this one more time? I'm guessing this will be something more easily >> hashed out at LSF, though. > > Come up with a prototype that doesn't suck and allows all fs features to > actually work. OK, I'll take this to mean that PMEM_IMMUTABLE is a non-starter. Perhaps synchronous page faults (or whatever you want to call it) would work, but... > And show an application that actually cares and shows benefits on > publicly available real hardware. This is the crux of the issue. > Until then go away and stop wasting everyones time. Fair enough. It seems fairly likely that this sort of functionality would provide a big benefit. But I agree we should have a real-world use case as proof. Thanks, Jeff -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>