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2015-10-04bridge: netlink: export root path costNikolay Aleksandrov
Add IFLA_BR_ROOT_PATH_COST and export it via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: export root portNikolay Aleksandrov
Add IFLA_BR_ROOT_PORT and export it via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: export bridge idNikolay Aleksandrov
Add IFLA_BR_BRIDGE_ID and export br->bridge_id via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: export root idNikolay Aleksandrov
Add IFLA_BR_ROOT_ID and export br->designated_root via netlink. For this purpose add struct ifla_bridge_id that would represent struct bridge_id. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: netlink: add group_fwd_mask supportNikolay Aleksandrov
Add IFLA_BR_GROUP_FWD_MASK attribute to allow setting and retrieving the group_fwd_mask via netlink. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: vlan: use br_vlan_should_use to simplify __vlan_add/delNikolay Aleksandrov
The checks that lead to num_vlans change are always what br_vlan_should_use checks for, namely if the vlan is only a context or not and depending on that it's either not counted or counted as a real/used vlan respectively. Also give better explanation in br_vlan_should_use's comment. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: vlan: drop master_flags from __vlan_addNikolay Aleksandrov
There's only one user now and we can include the flag directly. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: vlan: use br_vlan_(get|put)_master to deal with refcountsNikolay Aleksandrov
Introduce br_vlan_(get|put)_master which take a reference (or create the master vlan first if it didn't exist) and drop a reference respectively. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-04bridge: vlan: use rcu list for the ordered vlan listNikolay Aleksandrov
When I did the conversion to rhashtable I missed the required locking of one important user of the vlan list - br_get_link_af_size_filtered() which is called: br_ifinfo_notify() -> br_nlmsg_size() -> br_get_link_af_size_filtered() and the notifications can be sent without holding rtnl. Before this conversion the function relied on using rcu and since we already use rcu to destroy the vlans, we can simply migrate the list to use the rcu helpers. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp/dccp: add SLAB_DESTROY_BY_RCU flag for request socketsEric Dumazet
Before letting request sockets being put in TCP/DCCP regular ehash table, we need to add either : - SLAB_DESTROY_BY_RCU flag to their kmem_cache - add RCU grace period before freeing them. Since we carefully respected the SLAB_DESTROY_BY_RCU protocol like ESTABLISH and TIMEWAIT sockets, use it here. req_prot_init() being only used by TCP and DCCP, I did not add a new slab_flags into their rsk_prot, but reuse prot->slab_flags Since all reqsk_alloc() users are correctly dealing with a failure, add the __GFP_NOWARN flag to avoid traces under pressure. Fixes: 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03sched, bpf: make skb->priority writableDaniel Borkmann
{cls,act}_bpf can now set the skb->priority from an eBPF program based on various critera, so that for example classful qdiscs like multiq can update the skb's priority during enqueue time and further push it down into subsequent qdiscs. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03sched, bpf: add helper for retrieving routing realmsDaniel Borkmann
Using routing realms as part of the classifier is quite useful, it can be viewed as a tag for one or multiple routing entries (think of an analogy to net_cls cgroup for processes), set by user space routing daemons or via iproute2 as an indicator for traffic classifiers and later on processed in the eBPF program. Unlike actions, the classifier can inspect device flags and enable netif_keep_dst() if necessary. tc actions don't have that possibility, but in case people know what they are doing, it can be used from there as well (e.g. via devs that must keep dsts by design anyway). If a realm is set, the handler returns the non-zero realm. User space can set the full 32bit realm for the dst. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03ebpf: migrate bpf_prog's flags to bitfieldDaniel Borkmann
As we need to add further flags to the bpf_prog structure, lets migrate both bools to a bitfield representation. The size of the base structure (excluding insns) remains unchanged at 40 bytes. Add also tags for the kmemchecker, so that it doesn't throw false positives. Even in case gcc would generate suboptimal code, it's not being accessed in performance critical paths. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03switchdev: push object ID back to object structureJiri Pirko
Suggested-by: Scott Feldman <sfeldma@gmail.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03switchdev: bring back switchdev_obj and use it as a generic object paramJiri Pirko
Replace "void *obj" with a generic structure. Introduce couple of helpers along that. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03switchdev: rename switchdev_obj_fdb to switchdev_obj_port_fdbJiri Pirko
Make the struct name in sync with object id name. Suggested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03switchdev: rename switchdev_obj_vlan to switchdev_obj_port_vlanJiri Pirko
Make the struct name in sync with object id name. Suggested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03switchdev: rename SWITCHDEV_ATTR_* enum values to SWITCHDEV_ATTR_ID_*Jiri Pirko
To be aligned with obj. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03switchdev: rename SWITCHDEV_OBJ_* enum values to SWITCHDEV_OBJ_ID_*Jiri Pirko
Suggested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Scott Feldman <sfeldma@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: do not lock listener to process SYN packetsEric Dumazet
Everything should now be ready to finally allow SYN packets processing without holding listener lock. Tested: 3.5 Mpps SYNFLOOD. Plenty of cpu cycles available. Next bottleneck is the refcount taken on listener, that could be avoided if we remove SLAB_DESTROY_BY_RCU strict semantic for listeners, and use regular RCU. 13.18% [kernel] [k] __inet_lookup_listener 9.61% [kernel] [k] tcp_conn_request 8.16% [kernel] [k] sha_transform 5.30% [kernel] [k] inet_reqsk_alloc 4.22% [kernel] [k] sock_put 3.74% [kernel] [k] tcp_make_synack 2.88% [kernel] [k] ipt_do_table 2.56% [kernel] [k] memcpy_erms 2.53% [kernel] [k] sock_wfree 2.40% [kernel] [k] tcp_v4_rcv 2.08% [kernel] [k] fib_table_lookup 1.84% [kernel] [k] tcp_openreq_init_rwin Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp/dccp: add a reschedule point in inet_csk_listen_stop()Eric Dumazet
If a listener with thousands of children in accept queue is dismantled, it can take a while to close all of them. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: remove max_qlen_logEric Dumazet
This control variable was set at first listen(fd, backlog) call, but not updated if application tried to increase or decrease backlog. It made sense at the time listener had a non resizeable hash table. Also rounding to powers of two was not very friendly. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp/dccp: remove struct listen_sockEric Dumazet
It is enough to check listener sk_state, no need for an extra condition. max_qlen_log can be moved into struct request_sock_queue We can remove syn_wait_lock and the alignment it enforced. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: attach SYNACK messages to request sockets instead of listenerEric Dumazet
If a listen backlog is very big (to avoid syncookies), then the listener sk->sk_wmem_alloc is the main source of false sharing, as we need to touch it twice per SYNACK re-transmit and TX completion. (One SYN packet takes listener lock once, but up to 6 SYNACK are generated) By attaching the skb to the request socket, we remove this source of contention. Tested: listen(fd, 10485760); // single listener (no SO_REUSEPORT) 16 RX/TX queue NIC Sustain a SYNFLOOD attack of ~320,000 SYN per second, Sending ~1,400,000 SYNACK per second. Perf profiles now show listener spinlock being next bottleneck. 20.29% [kernel] [k] queued_spin_lock_slowpath 10.06% [kernel] [k] __inet_lookup_established 5.12% [kernel] [k] reqsk_timer_handler 3.22% [kernel] [k] get_next_timer_interrupt 3.00% [kernel] [k] tcp_make_synack 2.77% [kernel] [k] ipt_do_table 2.70% [kernel] [k] run_timer_softirq 2.50% [kernel] [k] ip_finish_output 2.04% [kernel] [k] cascade Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp/dccp: shrink struct listen_sockEric Dumazet
We no longer use hash_rnd, nr_table_entries and syn_table[] For a listener with a backlog of 10 millions sockets, this saves 80 MBytes of vmalloced memory. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp/dccp: install syn_recv requests into ehash tableEric Dumazet
In this patch, we insert request sockets into TCP/DCCP regular ehash table (where ESTABLISHED and TIMEWAIT sockets are) instead of using the per listener hash table. ACK packets find SYN_RECV pseudo sockets without having to find and lock the listener. In nominal conditions, this halves pressure on listener lock. Note that this will allow for SO_REUSEPORT refinements, so that we can select a listener using cpu/numa affinities instead of the prior 'consistent hash', since only SYN packets will apply this selection logic. We will shrink listen_sock in the following patch to ease code review. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Ying Cai <ycai@google.com> Cc: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp/dccp: remove inet_csk_reqsk_queue_added() timeout argumentEric Dumazet
This is no longer used. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: get_openreq[46]() changesEric Dumazet
When request sockets are no longer in a per listener hash table but on regular TCP ehash, we need to access listener uid through req->rsk_listener get_openreq6() also gets a const for its request socket argument. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: remove BUG_ON() in tcp_check_req()Eric Dumazet
Once listener is lockless, its sk_state can change anytime. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: cleanup tcp_v[46]_inbound_md5_hash()Eric Dumazet
We'll soon have to call tcp_v[46]_inbound_md5_hash() twice. Also add const attribute to the socket, as it might be the unlocked listener for SYN packets. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: call sk_mark_napi_id() on the child, not the listenerEric Dumazet
This fixes a typo : We want to store the NAPI id on child socket. Presumably nobody really uses busy polling, on short lived flows. Fixes: 3d97379a67486 ("tcp: move sk_mark_napi_id() at the right place") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: move synflood_warned into struct request_sock_queueEric Dumazet
long term plan is to remove struct listen_sock when its hash table is no longer there. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: move qlen/young out of struct listen_sockEric Dumazet
qlen_inc & young_inc were protected by listener lock, while qlen_dec & young_dec were atomic fields. Everything needs to be atomic for upcoming lockless listener. Also move qlen/young in request_sock_queue as we'll get rid of struct listen_sock eventually. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-03tcp: add a spinlock to protect struct request_sock_queueEric Dumazet
struct request_sock_queue fields are currently protected by the listener 'lock' (not a real spinlock) We need to add a private spinlock instead, so that softirq handlers creating children do not have to worry with backlog notion that the listener 'lock' carries. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-02nl802154: Missing return in nl802154_add_llsec_key()Dan Carpenter
There was a missing return here so it meant that often ieee802154_llsec_parse_key_id() was not called. Fixes: a26c5fd7622d ('nl802154: add support for security layer') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Conflicts: net/dsa/slave.c net/dsa/slave.c simply had overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) Fix regression in SKB partial checksum handling, from Pravin B Shalar. 2) Fix VLAN inside of VXLAN handling in i40e driver, from Jesse Brandeburg. 3) Cure softlockups during accept() in SCTP, from Karl Heiss. 4) MSG_PEEK should return multiple SKBs worth of data in AF_UNIX, from Aaron Conole. 5) IPV6 erroneously ignores output interface specifier in lookup key for route lookups, fix from David Ahern. 6) In Marvell DSA driver, forward unknown frames to CPU port, from Andrew Lunn. 7) Mission flow flag initializations in some code paths, from David Ahern. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: net: Initialize flow flags in input path net: dsa: fix preparation of a port STP update testptp: Silence compiler warnings on ppc64 net/mlx4: Handle return codes in mlx4_qp_attach_common dsa: mv88e6xxx: Enable forwarding for unknown to the CPU port skbuff: Fix skb checksum partial check. net: ipv6: Add RT6_LOOKUP_F_IFACE flag if oif is set net sysfs: Print link speed as signed integer bna: fix error handling af_unix: return data from multiple SKBs on recv() with MSG_PEEK flag af_unix: Convert the unix_sk macro to an inline function for type safety net: sctp: Don't use 64 kilobyte lookup table for four elements l2tp: protect tunnel->del_work by ref_count net/ibm/emac: bump version numbers for correct work with ethtool sctp: Prevent soft lockup when sctp_accept() is called during a timeout event sctp: Whitespace fix i40e/i40evf: check for stopped admin queue i40e: fix VLAN inside VXLAN r8169: fix handling rtl_readphy result net: hisilicon: fix handling platform_get_irq result
2015-10-01bridge: vlan: don't pass flags when creating context onlyNikolay Aleksandrov
We should not pass the original flags when creating a context vlan only because they may contain some flags that change behaviour in the bridge. The new global context should be with minimal set of flags, so pass 0 and let br_vlan_add() set the master flag only. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-01bridge: vlan: fix possible null ptr derefs on port init and deinitNikolay Aleksandrov
When a new port is being added we need to make vlgrp available after rhashtable has been initialized and when removing a port we need to flush the vlans and free the resources after we're sure noone can use the port, i.e. after it's removed from the port list and synchronize_rcu is executed. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-01bridge: vlan: move pvid inside net_bridge_vlan_groupNikolay Aleksandrov
One obvious way to converge more code (which was also used by the previous vlan code) is to move pvid inside net_bridge_vlan_group. This allows us to simplify some and remove other port-specific functions. Also gives us the ability to simply pass the vlan group and use all of the contained information. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-01bridge: vlan: fix possible null vlgrp deref while registering new portNikolay Aleksandrov
While a new port is being initialized the rx_handler gets set, but the vlans get initialized later in br_add_if() and in that window if we receive a frame with a link-local address we can try to dereference p->vlgrp in: br_handle_frame() -> br_handle_local_finish() -> br_should_learn() Fix this by checking vlgrp before using it. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-01bridge: vlan: adjust rhashtable initial size and hash locks sizeNikolay Aleksandrov
As Stephen pointed out the default initial size is more than we need, so let's start small (4 elements, thus nelem_hint = 3). Also limit the hash locks to the number of CPUs as we don't need any write-side scaling and this looks like the minimum. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-01Merge tag 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma Pull rdma fixes from Doug Ledford: - Fixes for mlx5 related issues - Fixes for ipoib multicast handling * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: IB/ipoib: increase the max mcast backlog queue IB/ipoib: Make sendonly multicast joins create the mcast group IB/ipoib: Expire sendonly multicast joins IB/mlx5: Remove pa_lkey usages IB/mlx5: Remove support for IB_DEVICE_LOCAL_DMA_LKEY IB/iser: Add module parameter for always register memory xprtrdma: Replace global lkey with lkey local to PD
2015-10-01ipv6: Add missing newline to __xfrm6_output_finishEric W. Biederman
Add a newline between variable declarations and the code. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2015-10-01ieee802154: handle datagram variables as u16Alexander Aring
This reverts commit 9abc378c66e3d6f437eed77c1c534cbc183523f7 ("ieee802154: 6lowpan: change datagram var types"). The reason is that I forgot the IPv6 fragmentation here. Our MTU of lowpan interface is 1280 and skb->len should not above of that. If we reach a payload above 1280 in IPv6 header then we have a IPv6 fragmentation above 802.15.4 6LoWPAN fragmentation. The type "u16" was fine, instead I added now a WARN_ON_ONCE if skb->len is above MTU which should never happen otherwise IPv6 on minimum MTU size is broken. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-09-30RDS: Use per-bucket rw lock for bind hash-tableSantosh Shilimkar
One global lock protecting hash-tables with 1024 buckets isn't efficient and it shows up in a massive systems with truck loads of RDS sockets serving multiple databases. The perf data clearly highlights the contention on the rw lock in these massive workloads. When the contention gets worse, the code gets into a state where it decides to back off on the lock. So while it has disabled interrupts, it sits and backs off on this lock get. This causes the system to become sluggish and eventually all sorts of bad things happen. The simple fix is to move the lock into the hash bucket and use per-bucket lock to improve the scalability. Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
2015-09-30RDS: fix rds_sock reference bug while doing bindSantosh Shilimkar
One need to take rds socket reference while using it and release it once done with it. rds_add_bind() code path does not do that so lets fix it. Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
2015-09-30RDS: make socket bind/release locking scheme simple and more efficientSantosh Shilimkar
RDS bind and release locking scheme is very inefficient. It uses RCU for maintaining the bind hash-table which is great but it also needs to hold spinlock for [add/remove]_bound(). So overall usecase, the hash-table concurrent speedup doesn't pay off. In fact blocking nature of synchronize_rcu() makes the RDS socket shutdown too slow which hurts RDS performance since connection shutdown and re-connect happens quite often to maintain the RC part of the protocol. So we make the locking scheme simpler and more efficient by replacing spin_locks with reader/writer locks and getting rid off rcu for bind hash-table. In subsequent patch, we also covert the global lock with per-bucket lock to reduce the global lock contention. Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
2015-09-30RDS: use kfree_rcu in rds_ib_remove_ipaddrSantosh Shilimkar
synchronize_rcu() slowing down un-necessarily the socket shutdown path. It is used just kfree() the ip addresses in rds_ib_remove_ipaddr() which is perfect usecase for kfree_rcu(); So lets use that to gain some speedup. Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
2015-09-30ieee802154: 6lowpan: add tx/rx statsAlexander Aring
This patch adds support for increment transmit and receive stats. The meaning of these stats are IPv6 based, which shows the stats after running the 6lowpan adaptation layer (uncompression/compression, fragmentation handling) on receive and before the adaptation layer when transmit. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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