Here's v8 of the io_uring interface. Various little fixes all over the map, and addressing various review concerns. No new features, but the io_uring_enter(2) system call grew arguments for a sigset_t so we can support poll properly. For a general introduction to this patchset, see previous postings or the LWN writeup here: https://lwn.net/Articles/776703/ No new changes in the liburing user side library, but as a reference, you can clone that here: git://git.kernel.dk/liburing We're still missing a man page for io_uring_enter(2), but the two other system calls are documented. 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 Changes since v7: - Rebase on v5.0-rc4 - Add grace period control for SQ poll - Add IORING_ENTER_SQ_WAKEUP instead of overloading 'to_submit' - Address various minor review comments - Use in_compat_syscall() instead of storing it in the ctx - Remove now unneeded compat system call - Ensure nops appropriately serialize the cq ring - Add sigset_t support for wait side of io_uring_enter(2) - Stop using page_frag_free() - Remove duplicate include - Make sure sq thread and application can't stomp on each other - Add array_index_nospec() limiter for p->sq_thread_cpu 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 | 2550 ++++++++++++++++++++++++ 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 | 143 ++ init/Kconfig | 9 + kernel/sys_ni.c | 3 + 23 files changed, 2869 insertions(+), 41 deletions(-) -- Jens Axboe
