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f2d2d69438
freebsd-skq/sys/net
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Robert Watson f2d2d69438 Rework netisr policy mechanism so that per-protocol dispatch policies can 
be represented:

- A single policy namespace is defined, consisting of four possible
  policies: "default" to use the global default, "deferred" to force
  deferred dispatch, "direct" to employ direct dispatch where possible, and
  "hybrid" which makes a dynamic decision based on CPU affinity, ordering,
  etc.  Routines are implemented to convert between strings and an integer
  namespace.

- A new global variable, netisr_dispatch_policy, subsumes existing global
  variables for direct dispatch, forced direct dispatch, etc, and is used
  for explicit policy interpretation and composition.  Old variables remain
  so that they can be exported by legacy sysctls for use by old netstat(1)
  binaries.  A new sysctl and tunable, netisr.dispatch.policy, accepts the
  above strings for specifying a global policy default.

- The protocol registration structure, netisr_handler, grows an nh_dispatch
  field, which accepts a per-policy policy override.  The default value is
  '0', which corresponds to "default", meaning that protocols will accept
  the global default policy unless otherwise specified.

- Policies are now interpreted and composed explicitly at various points in
  packet dispatch; protocol policies override global policies.

- Protocols grow the ability to express a non-opinion about affinity even
  when implenting m2cpuid by returning NETISR_CPUID_NONE.  In that case, the
  framework falls back on source ordering, rather than simply using the
  current CPU.

These changes are in support of allowing link layer re-dispatch based on
RSS or similar hashes provided by NICs, especially in the case where the
number of hardware receive queues matches hardware core count, rather than
hardware thread count, requiring further software redistributeon.  (i.e.,
on RMI XLR).

MFC after:      3 weeks
Reviewed by:    bz
Sponsored by:   Juniper Networks, Inc.
2011-05-24 12:34:19 +00:00
..
bpf_buffer.c o Swap descriptions for net.bpf.bufsize and net.bpf.maxbufsize. 2010-11-24 05:50:19 +00:00
bpf_buffer.h
bpf_filter.c
bpf_jitter.c General style cleanup, no functional change. 2009-11-20 21:12:40 +00:00
bpf_jitter.h - Allocate scratch memory on stack instead of pre-allocating it with 2009-11-20 18:49:20 +00:00
bpf_zerocopy.c Introduce and use a new VM interface for temporarily pinning pages. This 2010-12-25 21:26:56 +00:00
bpf_zerocopy.h
bpf.c Fix a typo in a comment. 2010-09-16 18:37:33 +00:00
bpf.h Sync DLTs with the latest pcap version. 2010-10-29 18:41:09 +00:00
bpfdesc.h Implement flexible BPF timestamping framework. 2010-06-15 19:28:44 +00:00
bridgestp.c Rework global locks for interface list and index management, correcting 2009-08-23 20:40:19 +00:00
bridgestp.h
ethernet.h Change if_output to take a struct route as its fourth argument in order 2009-04-16 20:30:28 +00:00
fddi.h Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
firewire.h Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
flowtable.c - Restore dropping the priority of syncer down to PPAUSE when it is idle. 2011-01-06 22:17:07 +00:00
flowtable.h allocate ipv6 flows from the ipv6 flow zone 2010-05-16 21:48:39 +00:00
ieee8023ad_lacp.c Use the flowid if its available for selecting the tx port. 2009-04-30 14:25:44 +00:00
ieee8023ad_lacp.h
if_arc.h Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
if_arcsubr.c Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
if_arp.h - Merge changes to the base system to support OFED. These include 2011-03-21 09:40:01 +00:00
if_atm.h Change if_output to take a struct route as its fourth argument in order 2009-04-16 20:30:28 +00:00
if_atmsubr.c Move "options MAC" from opt_mac.h to opt_global.h, as it's now in GENERIC 2009-06-05 14:55:22 +00:00
if_bridge.c Unbreak LINT by moving all carp hooks to net/if.c / netinet/ip_carp.h, with 2010-08-11 20:18:19 +00:00
if_bridgevar.h
if_clone.c After some off-list discussion, revert a number of changes to the 2010-11-22 19:32:54 +00:00
if_clone.h Introduce and use a sysinit-based initialization scheme for virtual 2009-07-23 20:46:49 +00:00
if_dead.c Remove if_timer/if_watchdog now that they are no longer used. The space 2009-11-30 21:25:57 +00:00
if_debug.c Factor out DDB commands from r204145, r204279 into if_debug.c for further 2010-10-25 08:30:19 +00:00
if_disc.c Change if_output to take a struct route as its fourth argument in order 2009-04-16 20:30:28 +00:00
if_dl.h
if_edsc.c
if_ef.c Add new tunable 'net.link.ifqmaxlen' to set default send interface 2010-05-03 07:32:50 +00:00
if_enc.c Make various (pseudo) interfaces compile without INET in the kernel 2011-04-27 19:30:44 +00:00
if_enc.h
if_epair.c Allow for vlan(4) interfaces with MTU of 1500 bytes to be configured 2011-05-24 08:02:55 +00:00
if_ethersubr.c After some off-list discussion, revert a number of changes to the 2010-11-22 19:32:54 +00:00
if_faith.c Merge the remainder of kern_vimage.c and vimage.h into vnet.c and 2009-08-01 19:26:27 +00:00
if_fddisubr.c Break at_ifawithnet() into two variants: 2009-06-24 10:32:44 +00:00
if_fwsubr.c Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
if_gif.c Hide the outer IP addresses of a tunnel interfaces (gif(4), gre(4)) 2011-03-02 21:39:08 +00:00
if_gif.h MFP4: @176978-176982, 176984, 176990-176994, 177441 2010-04-29 11:52:42 +00:00
if_gre.c Hide the outer IP addresses of a tunnel interfaces (gif(4), gre(4)) 2011-03-02 21:39:08 +00:00
if_gre.h The NetBSD Foundation has granted permission to remove clause 3 and 4 from 2010-03-01 17:05:46 +00:00
if_iso88025subr.c Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
if_lagg.c LACP frames must not be send VLAN-tagged, check for that before processing. 2011-04-30 20:34:52 +00:00
if_lagg.h Propagate the vlan eventis to the underlying interfaces/members so they can do initialization of hw related features. 2010-02-06 13:49:35 +00:00
if_llatbl.c The statically configured (permanent) ARP entries are removed when an 2011-05-20 19:12:20 +00:00
if_llatbl.h The statically configured (permanent) ARP entries are removed when an 2011-05-20 19:12:20 +00:00
if_llc.h
if_loop.c After some off-list discussion, revert a number of changes to the 2010-11-22 19:32:54 +00:00
if_media.c Fix typos - remove duplicate "the". 2011-02-21 09:01:34 +00:00
if_media.h - Add 10baseT as an alias for 10baseT/UTP. 2011-05-15 12:58:29 +00:00
if_mib.c Merge the remainder of kern_vimage.c and vimage.h into vnet.c and 2009-08-01 19:26:27 +00:00
if_mib.h
if_sppp.h
if_spppfr.c
if_spppsubr.c Merge the remainder of kern_vimage.c and vimage.h into vnet.c and 2009-08-01 19:26:27 +00:00
if_stf.c Add new tunable 'net.link.ifqmaxlen' to set default send interface 2010-05-03 07:32:50 +00:00
if_stf.h
if_tap.c - Expand scope of tun/tap softc locks to cover more softc fields and 2010-09-22 21:02:43 +00:00
if_tap.h
if_tapvar.h
if_tun.c Fix white space nits and style 2011-05-06 20:46:29 +00:00
if_tun.h
if_types.h - Merge changes to the base system to support OFED. These include 2011-03-21 09:40:01 +00:00
if_var.h - Merge changes to the base system to support OFED. These include 2011-03-21 09:40:01 +00:00
if_vlan_var.h - Merge changes to the base system to support OFED. These include 2011-03-21 09:40:01 +00:00
if_vlan.c - Merge changes to the base system to support OFED. These include 2011-03-21 09:40:01 +00:00
if.c When removing ifnets, we should first remove the reference to ifnet 2011-04-04 07:45:08 +00:00
if.h Adds IFF_CANTCONFIG to IFF_CANTCHANGE that it shouldn't happen through 2010-12-07 20:31:04 +00:00
iso88025.h Switch cmd argument to u_long. This matches what if_ethersubr.c does and 2009-06-21 10:29:31 +00:00
netisr_internal.h Rework netisr policy mechanism so that per-protocol dispatch policies can 2011-05-24 12:34:19 +00:00
netisr.c Rework netisr policy mechanism so that per-protocol dispatch policies can 2011-05-24 12:34:19 +00:00
netisr.h Rework netisr policy mechanism so that per-protocol dispatch policies can 2011-05-24 12:34:19 +00:00
pfil.c Clean up comments, white space, and style in pfil.c (especially new VNET 2009-10-19 15:19:14 +00:00
pfil.h small portability fix to build on linux/windows 2010-07-15 14:41:06 +00:00
pfkeyv2.h Added support for NAT-Traversal (RFC 3948) in IPsec stack. 2009-06-12 15:44:35 +00:00
ppp_defs.h
radix_mpath.c One of the advantages of enabling ECMP (a.k.a RADIX_MPATH) is to 2010-03-09 01:11:45 +00:00
radix_mpath.h
radix.c whitespace cleanup 2010-07-15 14:41:59 +00:00
radix.h Not only flush the ipfw tables when unloading ipfw or tearing 2010-03-07 15:37:58 +00:00
raw_cb.c Merge the remainder of kern_vimage.c and vimage.h into vnet.c and 2009-08-01 19:26:27 +00:00
raw_cb.h Remove unused VNET_SET() and related macros; only VNET_GET() is 2009-07-16 21:13:04 +00:00
raw_usrreq.c Merge the remainder of kern_vimage.c and vimage.h into vnet.c and 2009-08-01 19:26:27 +00:00
route.c ouch, newrt is used on the return path, my fault. 2011-03-19 21:10:57 +00:00
route.h Remove dead code. 2011-03-20 08:35:00 +00:00
rtsock.c As info.rti_info[RTAX_DST] can point inside of rtm we must not free the rtm 2011-02-10 01:24:09 +00:00
slcompress.c
slcompress.h
vnet.c Remove unneeded includes of <sys/linker_set.h>. Other headers that use 2011-01-11 13:59:06 +00:00
vnet.h Mfp4 CH=177255: 2011-02-11 14:17:58 +00:00
zlib.c
zlib.h Merge projects/enhanced_coredumps (r204346) into HEAD: 2010-03-02 06:58:58 +00:00
zutil.h Merge projects/enhanced_coredumps (r204346) into HEAD: 2010-03-02 06:58:58 +00:00