On Tue, Mar 04, 2025 at 08:35:52PM +0000, Pavel Begunkov wrote: > Clarification: the mentioned work was reverted or pulled out _upstream_, > it wasn't about back porting. I don't think we ever tried synchronous reporting of wouldblock errors, but maybe i'm just too old and confused by now. > lines. And Christoph even of confirmed that the main check in the patch > does what's intended, I absolutely did not. > Another option is to push all io_uring filesystem / iomap requests > to the slow path (where blocking is possible) and have a meaningful > perf regression for those who still use fs+io_uring direct IO. And > I don't put any dramaticism into it, it's essentially what users > who detect the problem already do, either that but from the user > space or disabling io_uring all together. If you don't want to do synchronous wouldblock errors that's your only option. I think it would suck badly, but it's certainly easier to backport.
