On Wed, Jun 25, 2025 at 06:40:07AM -0400, Jeff Layton wrote: > Another option: > > We could expose this functionality in preadv2() with a new RWF_WBERR > flag (better names welcome). That way applications could opt-in to > checking for writeback errors like this. With that, the application is > at least explicitly saying that it wants this behavior. That sounds like a really strange interface to me. I have to admit I don't fully understand the use case where an application cares about these errors, but also doesn't use f(data)sync or sync(fs) to actually persist the data. If we can come up with a coherent use case for that we should simply add a new syscall or fcntl to query the delayed writeback errors instead of overloading other interfaces.
