[PATCH 0/1] pipe: only enable the extra wake_up(rd_wait) when epoll is actually used

[Oleg Nesterov]

Breno, Christian, Mateusz,

To be honest, I am not sure this change makes a lot of sense.
But somehow the extra wakeup in anon_pipe_write() looks annoying to me.

Can you take a look?

Plus I'd like to know what sashiko.dev thinks.

I have no idea how to test it wrt performance...

Oleg.
---

 fs/pipe.c                 | 23 +++++++++++++++++++----
 include/linux/pipe_fs_i.h |  6 ++++--
 2 files changed, 23 insertions(+), 6 deletions(-)