Hi Xuan,
On 1/4/22 10:57 AM, Xuan Zhuo wrote:
This reverts commit bd0687c18e635b63233dc87f38058cd728802ab4.
When working with epoll, if the application encounters tx full, the
application will enter epoll_wait and wait for tx to be awakened when
there is room.
In the current situation, when tx is full pool->cached_need_wakeup may
not be 0 (regardless of whether the driver supports wakeup, or whether
the user uses XDP_USE_NEED_WAKEUP). The result is that if the user
enters epoll_wait, because soock_poll_wait is not called, causing the
user process to not be awakened.
Fixes: bd0687c18e63 ("xsk: Do not sleep in poll() when need_wakeup set")
Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
This is already reverted in net tree:
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=0706a78f31c4217ca144f630063ec9561a21548d
Thanks,
Daniel
