On 06/10/2017 12:34 AM, Al Viro wrote: > On Thu, Jun 08, 2017 at 12:39:10AM -0700, Christoph Hellwig wrote: >> As already indicated this whole series looks fine to me. >> >> Al: are you going to pick this up? Or Andrew? > > The main issue here is "let's bail out from ->write_iter() instances" > patch. It very obviously has holes in coverage. > > Could we have FMODE_AIO_NOWAIT and make those who claim to support it > set that in ->open()? And make aio check that and bail out if asked > for nowait on a file without that flag... > Yes, I would agree. We had FS_NOWAIT in filesystem type flags (in v3), but retracted it later in v4. Another option could be to keep the feature against FS_REQUIRES_DEV to rule out filesystems which are not local, but it again has the problem of holes in coverage. I will work on adding FMODE_AIO_NOWAIT in the meantime. Thanks, -- Goldwyn
