On 11/4/22 7:46 PM, Jeff Layton wrote: > On Fri, 2022-11-04 at 15:26 +0800, Jingbo Xu wrote: >> Switch to prepare_ondemand_read() interface and a self-contained request >> completion to get rid of netfs_io_[request|subrequest]. >> >> The whole request will still be split into slices (subrequest) according >> to the cache state of the backing file. As long as one of the >> subrequests fails, the whole request will be marked as failed. Besides >> it will not retry for short read. Similarly the whole request will fail >> if that really happens. >> > > That's sort of nasty. The kernel can generally give you a short read for > all sorts of reasons, some of which may have nothing to do with the > underlying file or filesystem. > > Passing an error back to an application on a short read is probably not > what you want to do here. The usual thing to do is just to return what > you can, and let the application redrive the request if it wants. > Yeah, thanks for your comment. We can fix this either in current patchset or a separate series. As we just discussed on IRC, we will fix in the following series. -- Thanks, Jingbo
