On Mon, Aug 9, 2021 at 2:52 AM gregkh@linuxfoundation.org wrote:
The patch below does not apply to the 4.4-stable tree.
It shouldn't.
The pipe buffer accounting and soft limits that introduced the whole "limp along with limited pipe buffers" behavior that this fixes was introduced by
Fixes: 759c01142a ("pipe: limit the per-user amount of pages allocated in pipes")
..which made it into 4.5.
So 4.4 is unaffected and doesn't want this patch.
Linus