Keeping the review train hot, this has all review comments addressed from v9, with a few other fixes on top. Outside of review comments, this fixes a few annoyances with the SQPOLL thread. We now shut it down quick, regardless of idle setting, and I got rid of the silly need to park it for exit. Also fixed a case with SQPOLL where we'd get -EAGAIN due to request shortage in the block layer, and we didn't handle that properly. Now we do. The liburing git repo now has a io_uring_setup(2) man page, but otherwise no changes. You can clone that here: git://git.kernel.dk/liburing Patches are against 5.0-rc4, and can also be found in my io_uring branch here: git://git.kernel.dk/linux-block io_uring Since v9: - Use FOLL_ANON instead of checking vmas for file backing - Fix bad nospec index limiter - Address various minor review comments - Fix drop extra file reference in case of submission error - Fix race with sqe->opcode and "needs mm" checks without sqe copy - Un-unionize io_kiocb->submit, from the async path it's almost impossible to do this safely. - Clear io_kiocb->error for polled IO - Fix EAGAIN for polled IO and SQPOLL for the !force_nonblock case of running out of block requests - Remove need for kthread parking - Ensure sqo thread exits as quickly as possible Documentation/filesystems/vfs.txt | 3 + arch/x86/entry/syscalls/syscall_32.tbl | 3 + arch/x86/entry/syscalls/syscall_64.tbl | 3 + block/bio.c | 59 +- fs/Makefile | 1 + fs/block_dev.c | 19 +- fs/file.c | 15 +- fs/file_table.c | 9 +- fs/gfs2/file.c | 2 + fs/io_uring.c | 2611 ++++++++++++++++++++++++ fs/iomap.c | 48 +- fs/xfs/xfs_file.c | 1 + include/linux/bio.h | 14 + include/linux/blk_types.h | 1 + include/linux/file.h | 2 + include/linux/fs.h | 6 +- include/linux/iomap.h | 1 + include/linux/sched/user.h | 2 +- include/linux/syscalls.h | 8 + include/uapi/asm-generic/unistd.h | 8 +- include/uapi/linux/io_uring.h | 141 ++ init/Kconfig | 9 + kernel/sys_ni.c | 3 + 23 files changed, 2928 insertions(+), 41 deletions(-) -- Jens Axboe
