On Thu, Dec 21, 2023 at 04:09:10AM +0100, Ahelenia Ziemiańska wrote: > We request non-blocking I/O in the generic copy_splice_read, but > "the tty layer doesn't actually honor the IOCB_NOWAIT flag for > various historical reasons.". This means that a tty->pipe splice > will happily sleep with the pipe locked forever, and any process > trying to take it (due to an open/read/write/&c.) will enter > uninterruptible sleep. > > This also masks inconsistent wake-ups (usually every second line) > when splicing from ttys in icanon mode. > > Link: https://lore.kernel.org/linux-fsdevel/CAHk-=wimmqG_wvSRtMiKPeGGDL816n65u=Mq2+H3-=uM2U6FmA@xxxxxxxxxxxxxx/ > Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@xxxxxxxxxxxxxxxxxx> > --- Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
