Magnus Karlsson bd0687c18e xsk: Do not sleep in poll() when need_wakeup set ... Do not sleep in poll() when the need_wakeup flag is set. When this flag is set, the application needs to explicitly wake up the driver with a syscall (poll, recvmsg, sendmsg, etc.) to guarantee that Rx and/or Tx processing will be processed promptly. But the current code in poll(), sleeps first then wakes up the driver. This means that no driver processing will occur (baring any interrupts) until the timeout has expired. Fix this by checking the need_wakeup flag first and if set, wake the driver and return to the application. Only if need_wakeup is not set should the process sleep if there is a timeout set in the poll() call. Fixes: 77cd0d7b3f ("xsk: add support for need_wakeup flag in AF_XDP rings") Reported-by: Keith Wiles <keith.wiles@intel.com> Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Link: https://lore.kernel.org/bpf/20211214102607.7677-1-magnus.karlsson@gmail.com		2021-12-14 15:20:54 +01:00
..
6lowpan
9p	9p: fix a bunch of checkpatch warnings	2021-11-04 21:04:25 +09:00
802	llc/snap: constify dev_addr passing	2021-10-13 09:40:46 -07:00
8021q	net: vlan: fix underflow for the real_dev refcnt	2021-11-26 11:20:46 -08:00
appletalk
atm	net: atm: use address setting helpers	2021-10-24 13:59:45 +01:00
ax25	ax25: constify dev_addr passing	2021-10-13 09:40:45 -07:00
batman-adv	Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2021-11-10 16:15:54 -08:00
bluetooth	bluetooth: use dev_addr_set()	2021-10-25 11:01:29 -07:00
bpf	bpf: Add dummy BPF STRUCT_OPS for test purpose	2021-11-01 14:10:00 -07:00
bpfilter
bridge	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-11-01 20:05:14 -07:00
caif	net: caif: get ready for const netdev->dev_addr	2021-10-24 13:59:45 +01:00
can	can: j1939: j1939_tp_cmd_recv(): check the dst address of TP.CM_BAM	2021-11-06 17:29:32 +01:00
ceph	libceph, ceph: move ceph_osdc_copy_from() into cephfs code	2021-11-08 03:29:52 +01:00
core	net, neigh: clear whole pneigh_entry at alloc time	2021-12-08 17:41:44 -08:00
dcb
dccp	tcp: switch orphan_count to bare per-cpu counters	2021-10-15 11:28:34 +01:00
decnet	net: Remove redundant if statements	2021-08-05 13:27:50 +01:00
dns_resolver
dsa	net: dsa: felix: fix broken VLAN-tagged PTP under VLAN-aware bridge	2021-11-03 14:22:00 +00:00
ethernet	eth: platform: add a helper for loading netdev->dev_addr	2021-10-08 14:54:33 +01:00
ethtool	ethtool: do not perform operations on net devices being unregistered	2021-12-06 16:53:32 -08:00
hsr	net: hsr: Add support for redbox supervision frames	2021-10-26 14:52:17 +01:00
ieee802154	mac802154: use dev_addr_set() - manual	2021-10-20 14:27:40 +01:00
ife
ipv4	udp: using datalen to cap max gso segments	2021-12-09 07:48:07 -08:00
ipv6	seg6: fix the iif in the IPv6 socket control block	2021-12-09 07:55:42 -08:00
iucv	net/iucv: Replace deprecated CPU-hotplug functions.	2021-08-09 10:13:32 +01:00
kcm
key
l2tp	net/l2tp: Fix reference count leak in l2tp_udp_recv_core	2021-09-09 11:00:20 +01:00
l3mdev
lapb
llc	llc/snap: constify dev_addr passing	2021-10-13 09:40:46 -07:00
mac80211	mac80211: fix throughput LED trigger	2021-11-15 10:56:57 +01:00
mac802154	mac802154: use dev_addr_set() - manual	2021-10-20 14:27:40 +01:00
mctp	mctp: Don't let RTM_DELROUTE delete local routes	2021-12-02 12:15:25 +00:00
mpls	net: mpls: Remove rcu protection from nh_dev	2021-11-29 12:39:42 +00:00
mptcp	mptcp: use delegate action to schedule 3rd ack retrans	2021-11-20 14:24:00 +00:00
ncsi	net/ncsi : Add payload to be 32-bit aligned to fix dropped packets	2021-11-24 11:53:17 +00:00
netfilter	netfilter: conntrack: annotate data-races around ct->timeout	2021-12-08 01:29:15 +01:00
netlabel	net: fix NULL pointer reference in cipso_v4_doi_free	2021-08-30 12:23:18 +01:00
netlink	net: netlink: af_netlink: Prevent empty skb by adding a check on len.	2021-11-30 17:45:01 -08:00
netrom	ax25: constify dev_addr passing	2021-10-13 09:40:45 -07:00
nfc	nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done	2021-12-09 07:50:32 -08:00
nsh
openvswitch	include/linux/mm.h: move nr_free_buffer_pages from swap.h to mm.h	2021-11-06 13:30:43 -07:00
packet	af_packet: Introduce egress hook	2021-10-14 23:06:44 +02:00
phonet	net: Remove redundant if statements	2021-08-05 13:27:50 +01:00
psample
qrtr	net: qrtr: combine nameservice into main module	2021-09-28 17:36:43 -07:00
rds	net/rds: correct socket tunable error in rds_tcp_tune()	2021-12-02 12:16:57 +00:00
rfkill
rose	rose: constify dev_addr passing	2021-10-13 09:40:45 -07:00
rxrpc	rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer()	2021-11-29 15:40:02 +00:00
sched	sch_cake: do not call cake_destroy() from cake_init()	2021-12-10 08:11:36 -08:00
sctp	net,lsm,selinux: revert the security_sctp_assoc_established() hook	2021-11-14 12:21:53 +00:00
smc	net/smc: Keep smc_close_final rc during active close	2021-12-02 12:14:36 +00:00
strparser	bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding	2021-11-09 01:05:28 +01:00
sunrpc	NFS client bugfixes for Linux 5.16	2021-11-27 10:33:55 -08:00
switchdev	net: switchdev: merge switchdev_handle_fdb_{add,del}_to_device	2021-10-27 14:54:02 +01:00
tipc	tipc: check for null after calling kmemdup	2021-11-17 20:04:52 -08:00
tls	net/tls: Fix authentication failure in CCM mode	2021-11-29 12:48:28 +00:00
unix	af_unix: fix regression in read after shutdown	2021-11-20 15:10:30 +00:00
vmw_vsock	vsock/virtio: suppress used length validation	2021-11-22 14:49:03 +00:00
wireless	nl80211: fix radio statistics in survey dump	2021-11-15 10:51:51 +01:00
x25
xdp	xsk: Do not sleep in poll() when need_wakeup set	2021-12-14 15:20:54 +01:00
xfrm	Core:	2021-11-02 06:20:58 -07:00
compat.c
devres.c
Kconfig	net/core: disable NET_RX_BUSY_POLL on PREEMPT_RT	2021-10-01 15:45:10 -07:00
Makefile
socket.c	Core:	2021-08-31 16:43:06 -07:00
sysctl_net.c	sections: move and rename core_kernel_data() to is_kernel_core_data()	2021-11-09 10:02:50 -08:00