Commit ab5b28b0 authored by Martin Karsten's avatar Martin Karsten Committed by Jakub Kicinski
Browse files

eventpoll: Trigger napi_busy_loop, if prefer_busy_poll is set 



Setting prefer_busy_poll now leads to an effectively nonblocking
iteration though napi_busy_loop, even when busy_poll_usecs is 0.

Signed-off-by: default avatarMartin Karsten <mkarsten@uwaterloo.ca>
Co-developed-by: default avatarJoe Damato <jdamato@fastly.com>
Signed-off-by: default avatarJoe Damato <jdamato@fastly.com>
Tested-by: default avatarJoe Damato <jdamato@fastly.com>
Tested-by: default avatarMartin Karsten <mkarsten@uwaterloo.ca>
Acked-by: default avatarStanislav Fomichev <sdf@fomichev.me>
Reviewed-by: default avatarSridhar Samudrala <sridhar.samudrala@intel.com>
Link: https://patch.msgid.link/20241109050245.191288-4-jdamato@fastly.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 3fcbecbd

fs/eventpoll.c

+3 −1
Original line number Diff line number Diff line
@@ -420,7 +420,9 @@ static bool busy_loop_ep_timeout(unsigned long start_time, 


static bool ep_busy_loop_on(struct eventpoll *ep)

{

	return !!READ_ONCE(ep->busy_poll_usecs) || net_busy_loop_on();

	return !!READ_ONCE(ep->busy_poll_usecs) ||

	       READ_ONCE(ep->prefer_busy_poll) ||

	       net_busy_loop_on();

}



static bool ep_busy_loop_end(void *p, unsigned long start_time)