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The pipe read/write side is perfectly fine for nonblocking IO, however splice and vmsplice can potentially wait for IO with the pipe lock held. Please pull! The following changes since commit 457391b0380335d5e9a5babdec90ac53928b23b4: Linux 6.3 (2023-04-23 12:02:52 -0700) are available in the Git repository at: git://git.kernel.dk/linux.git tags/pipe-nonblock-2023-05-06 for you to fetch changes up to afed6271f5b0d78ca1a3739c1da4aa3629b26bba: pipe: set FMODE_NOWAIT on pipes (2023-04-25 14:08:59 -0600) ---------------------------------------------------------------- pipe-nonblock-2023-05-06 ---------------------------------------------------------------- Jens Axboe (2): splice: clear FMODE_NOWAIT on file if splice/vmsplice is used pipe: set FMODE_NOWAIT on pipes fs/pipe.c | 3 +++ fs/splice.c | 34 ++++++++++++++++++++++++++++++---- 2 files changed, 33 insertions(+), 4 deletions(-)