On 11/23/19 3:42 PM, Pavel Begunkov wrote: > Dependant links of a fixed-read/write are always cancelled. The reason > is that io_complete_rw_common() uses req->result to decide whether to > fail links, which is set as res=io_import_iovec(). However, > io_import_fixed() doesn't return size, but error code. See: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5e559561a8d7e6d4adfce6aa8fbf3daa3dec1577 Just not in the 5.5 branches. We probably do want to make it ssize_t to be more proper, but IO in Linux is capped at 2G anyway so doesn't make a difference right now. -- Jens Axboe
