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  1. 06 7月, 2016 4 次提交
    • D
      rxrpc: Provide queuing helper functions · 5acbee46
      由 David Howells 提交于 
      Provide queueing helper functions so that the queueing of local and
connection objects can be fixed later.

The issue is that a ref on the object needs to be passed to the work queue,
but the act of queueing the object may fail because the object is already
queued.  Testing the queuedness of an object before hand doesn't work
because there can be a race with someone else trying to queue it.  What
will have to be done is to adjust the refcount depending on the result of
the queue operation.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
      5acbee46
    • H
      rxrpc: Avoid using stack memory in SG lists in rxkad · a263629d
      由 Herbert Xu 提交于 
      rxkad uses stack memory in SG lists which would not work if stacks were
allocated from vmalloc memory.  In fact, in most cases this isn't even
necessary as the stack memory ends up getting copied over to kmalloc
memory.

This patch eliminates all the unnecessary stack memory uses by supplying
the final destination directly to the crypto API.  In two instances where a
temporary buffer is actually needed we also switch use a scratch area in
the rxrpc_call struct (only one DATA packet will be being secured or
verified at a time).

Finally there is no need to split a split-page buffer into two SG entries
so code dealing with that has been removed.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NAndy Lutomirski <luto@kernel.org>
Signed-off-by: NDavid Howells <dhowells@redhat.com>
      a263629d
    • D
      rxrpc: Check the source of a packet to a client conn · 689f4c64
      由 David Howells 提交于 
      When looking up a client connection to which to route a packet, we need to
check that the packet came from the correct source so that a peer can't try
to muck around with another peer's connection.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
      689f4c64
    • D
      rxrpc: Fix some sparse errors · 88b99d0b
      由 David Howells 提交于 
      Fix the following sparse errors:

../net/rxrpc/conn_object.c:77:17: warning: incorrect type in assignment (different base types)
../net/rxrpc/conn_object.c:77:17:    expected restricted __be32 [usertype] call_id
../net/rxrpc/conn_object.c:77:17:    got unsigned int [unsigned] [usertype] call_id
../net/rxrpc/conn_object.c:84:21: warning: restricted __be32 degrades to integer
../net/rxrpc/conn_object.c:86:26: warning: restricted __be32 degrades to integer
../net/rxrpc/conn_object.c:357:15: warning: incorrect type in assignment (different base types)
../net/rxrpc/conn_object.c:357:15:    expected restricted __be32 [usertype] epoch
../net/rxrpc/conn_object.c:357:15:    got unsigned int [unsigned] [usertype] epoch
../net/rxrpc/conn_object.c:369:21: warning: restricted __be32 degrades to integer
../net/rxrpc/conn_object.c:371:26: warning: restricted __be32 degrades to integer
../net/rxrpc/conn_object.c:411:21: warning: restricted __be32 degrades to integer
../net/rxrpc/conn_object.c:413:26: warning: restricted __be32 degrades to integer
Signed-off-by: NDavid Howells <dhowells@redhat.com>
      88b99d0b
  3. 01 7月, 2016 1 次提交
    • D
      rxrpc: Fix processing of authenticated/encrypted jumbo packets · ac5d2683
      由 David Howells 提交于 
      When a jumbo packet is being split up and processed, the crypto checksum
for each split-out packet is in the jumbo header and needs placing in the
reconstructed packet header.

When the code was changed to keep the stored copy of the packet header in
host byte order, this reconstruction was missed.

Found with sparse with CF=-D__CHECK_ENDIAN__:

    ../net/rxrpc/input.c:479:33: warning: incorrect type in assignment (different base types)
    ../net/rxrpc/input.c:479:33:    expected unsigned short [unsigned] [usertype] _rsvd
    ../net/rxrpc/input.c:479:33:    got restricted __be16 [addressable] [usertype] _rsvd

Fixes: 0d12f8a4 ("rxrpc: Keep the skb private record of the Rx header in host byte order")
Signed-off-by: NDavid Howells <dhowells@redhat.com>
      ac5d2683
  5. 27 6月, 2016 32 次提交
  7. 26 6月, 2016 3 次提交
    • D
      Merge branch 'net-sched-bulk-dequeue' · e83e5bb1
      由 David S. Miller 提交于 
      Eric Dumazet says:

====================
net_sched: bulk dequeue and deferred drops

First patch adds an additional parameter to ->enqueue() qdisc method
so that drops can be done outside of critical section
(after locks are released).

Then fq_codel can have a small optimization to reduce number of cache
lines misses during a drop event
(possibly accumulating hundreds of packets to be freed).

A small htb change exports the backlog in class dumps.

Final patch adds bulk dequeue to qdiscs that were lacking this feature.

This series brings a nice qdisc performance increase (more than 80 %
in some cases).
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      e83e5bb1
    • E
      net_sched: generalize bulk dequeue · 4d202a0d
      由 Eric Dumazet 提交于 
      When qdisc bulk dequeue was added in linux-3.18 (commit
5772e9a3 "qdisc: bulk dequeue support for qdiscs
with TCQ_F_ONETXQUEUE"), it was constrained to some
specific qdiscs.

With some extra care, we can extend this to all qdiscs,
so that typical traffic shaping solutions can benefit from
small batches (8 packets in this patch).

For example, HTB is often used on some multi queue device.
And bonding/team are multi queue devices...

Idea is to bulk-dequeue packets mapping to the same transmit queue.

This brings between 35 and 80 % performance increase in HTB setup
under pressure on a bonding setup :

1) NUMA node contention :   610,000 pps -> 1,110,000 pps
2) No node contention   : 1,380,000 pps -> 1,930,000 pps

Now we should work to add batches on the enqueue() side ;)
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: John Fastabend <john.r.fastabend@intel.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Florian Westphal <fw@strlen.de>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: NJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      4d202a0d
    • E
      net_sched: sch_htb: export class backlog in dumps · 338ed9b4
      由 Eric Dumazet 提交于 
      We already get child qdisc qlen, we also can get its backlog
so that class dumps can report it.

Also replace qstats by a single drop counter, but move it in
a separate cache line so that drops do not dirty useful cache lines.

Tested:

$ tc -s cl sh dev eth0
class htb 1:1 root leaf 3: prio 0 rate 1Gbit ceil 1Gbit burst 500000b cburst 500000b
 Sent 2183346912 bytes 9021815 pkt (dropped 2340774, overlimits 0 requeues 0)
 rate 1001Mbit 517543pps backlog 120758b 499p requeues 0
 lended: 9021770 borrowed: 0 giants: 0
 tokens: 9 ctokens: 9
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      338ed9b4