linux/net/core
Eric Dumazet ac64da0b83 net: rps: fix cpu unplug
softnet_data.input_pkt_queue is protected by a spinlock that
we must hold when transferring packets from victim queue to an active
one. This is because other cpus could still be trying to enqueue packets
into victim queue.

A second problem is that when we transfert the NAPI poll_list from
victim to current cpu, we absolutely need to special case the percpu
backlog, because we do not want to add complex locking to protect
process_queue : Only owner cpu is allowed to manipulate it, unless cpu
is offline.

Based on initial patch from Prasad Sodagudi & Subash Abhinov
Kasiviswanathan.

This version is better because we do not slow down packet processing,
only make migration safer.

Reported-by: Prasad Sodagudi <psodagud@codeaurora.org>
Reported-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-16 01:02:42 -05:00
..
datagram.c skb_copy_datagram_iovec() can die 2014-12-09 16:29:11 -05:00
dev_addr_lists.c net: fix spelling for synchronized 2014-11-18 15:26:32 -05:00
dev_ioctl.c dev_ioctl: use sizeof(x) instead of sizeof x 2014-11-18 15:27:32 -05:00
dev.c net: rps: fix cpu unplug 2015-01-16 01:02:42 -05:00
drop_monitor.c net: Replace get_cpu_var through this_cpu_ptr 2014-08-26 13:45:47 -04:00
dst.c dst: no need to take reference on DST_NOCACHE dsts 2014-12-09 16:08:17 -05:00
ethtool.c ethtool: Support for configurable RSS hash function 2014-12-08 21:07:10 -05:00
fib_rules.c
filter.c net: sock: fix access via invalid file descriptor 2014-12-10 23:34:27 -05:00
flow_dissector.c flow-dissector: Fix alignment issue in __skb_flow_get_ports 2014-10-10 15:33:47 -04:00
flow.c
gen_estimator.c net: sched: make bstats per cpu and estimator RCU safe 2014-09-30 01:02:26 -04:00
gen_stats.c net_sched: fix unused variables in __gnet_stats_copy_basic_cpu() 2014-10-07 00:10:49 -04:00
iovec.c fold verify_iovec() into copy_msghdr_from_user() 2014-11-19 16:23:49 -05:00
link_watch.c net/core: include linux/types.h instead of asm/types.h 2014-11-18 15:26:32 -05:00
Makefile dmaengine-3.17 2014-10-07 20:39:25 -04:00
neighbour.c neighbour: fix base_reachable_time(_ms) not effective immediatly when changed 2015-01-14 00:28:00 -05:00
net_namespace.c bury struct proc_ns in fs/proc 2014-12-04 14:34:54 -05:00
net-procfs.c
net-sysfs.c net-sysfs: expose physical switch id for particular device 2014-12-02 20:01:22 -08:00
net-sysfs.h
net-traces.c
netclassid_cgroup.c
netevent.c
netpoll.c vlan: introduce *vlan_hwaccel_push_inside helpers 2014-11-21 14:20:17 -05:00
netprio_cgroup.c
pktgen.c net: pktgen: Deletion of an unnecessary check before the function call "proc_remove" 2014-11-19 15:20:15 -05:00
ptp_classifier.c
request_sock.c
rtnetlink.c net: Disallow providing non zero VLAN ID for NIC drivers FDB add flow 2014-12-16 15:41:19 -05:00
scm.c net: introduce helper macro for_each_cmsghdr 2014-12-10 22:41:55 -05:00
secure_seq.c net: use ktime_get_ns() and ktime_get_real_ns() helpers 2014-08-22 19:57:23 -07:00
skbuff.c net: Reset secmark when scrubbing packet 2014-12-24 00:21:43 -05:00
sock_diag.c
sock.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2014-12-13 13:33:26 -08:00
stream.c
sysctl_net_core.c net: provide a per host RSS key generic infrastructure 2014-11-16 15:59:11 -05:00
timestamping.c net-timestamp: Make the clone operation stand-alone from phy timestamping 2014-09-05 17:43:45 -07:00
tso.c net: tso: fix unaligned access to crafted TCP header in helper API 2014-10-22 12:52:55 -04:00
utils.c net: Convert LIMIT_NETDEBUG to net_dbg_ratelimited 2014-11-11 14:10:31 -05:00