linux-kernel - [PATCH 0/3] io_uring/uring_cmd: avoid double indirect call in task work dispatch

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251022231326.2527838-1-csander@purestorage.com>
Date: Wed, 22 Oct 2025 17:13:23 -0600
From: Caleb Sander Mateos <csander@...estorage.com>
To: Jens Axboe <axboe@...nel.dk>,
	Miklos Szeredi <miklos@...redi.hu>,
	Ming Lei <ming.lei@...hat.com>,
	Keith Busch <kbusch@...nel.org>,
	Christoph Hellwig <hch@....de>,
	Sagi Grimberg <sagi@...mberg.me>,
	Chris Mason <clm@...com>,
	David Sterba <dsterba@...e.com>
Cc: io-uring@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	linux-block@...r.kernel.org,
	linux-nvme@...ts.infradead.org,
	linux-btrfs@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Caleb Sander Mateos <csander@...estorage.com>
Subject: [PATCH 0/3] io_uring/uring_cmd: avoid double indirect call in task work dispatch

Define a io_req_tw_func_t wrapper function around each io_uring_cmd_tw_t
function to avoid the additional indirect call and save 8 bytes in
struct io_uring_cmd. Additionally avoid the io_should_terminate_tw()
computation in uring_cmd task work callbacks that don't need it.

Caleb Sander Mateos (3):
  io_uring: expose io_should_terminate_tw()
  io_uring/uring_cmd: call io_should_terminate_tw() when needed
  io_uring/uring_cmd: avoid double indirect call in task work dispatch

 block/ioctl.c                  |  1 +
 drivers/block/ublk_drv.c       |  3 +++
 drivers/nvme/host/ioctl.c      |  1 +
 fs/btrfs/ioctl.c               |  1 +
 fs/fuse/dev_uring.c            |  3 ++-
 include/linux/io_uring.h       | 14 +++++++++++
 include/linux/io_uring/cmd.h   | 46 ++++++++++++++++++++++------------
 include/linux/io_uring_types.h |  1 -
 io_uring/io_uring.h            | 13 ----------
 io_uring/uring_cmd.c           | 17 ++-----------
 10 files changed, 54 insertions(+), 46 deletions(-)

-- 
2.45.2