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  1. 10 9月, 2017 1 次提交
    • A
      sparc64: speed up etrap/rtrap on NG2 and later processors · a7159a87
      由 Anthony Yznaga 提交于 
      For many sun4v processor types, reading or writing a privileged register
has a latency of 40 to 70 cycles.  Use a combination of the low-latency
allclean, otherw, normalw, and nop instructions in etrap and rtrap to
replace 2 rdpr and 5 wrpr instructions and improve etrap/rtrap
performance.  allclean, otherw, and normalw are available on NG2 and
later processors.

The average ticks to execute the flush windows trap ("ta 0x3") with and
without this patch on select platforms:

 CPU            Not patched     Patched    % Latency Reduction

 NG2            1762            1558            -11.58
 NG4            3619            3204            -11.47
 M7             3015            2624            -12.97
 SPARC64-X      829             770              -7.12
Signed-off-by: NAnthony Yznaga <anthony.yznaga@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      a7159a87
  3. 30 8月, 2017 1 次提交
  5. 29 8月, 2017 3 次提交
  7. 16 8月, 2017 18 次提交
  9. 11 8月, 2017 12 次提交
    • D
      Merge branch 'sparc64-M7-memcpy' · fa5dc772
      由 David S. Miller 提交于 
      Babu Moger says:

====================
sparc64: Update memcpy, memset etc. for M7/M8 architectures

This series of patches updates the memcpy, memset, copy_to_user, copy_from_user
etc for SPARC M7/M8 architecture.

New algorithm here takes advantage of the M7/M8 block init store ASIs, with much
more optimized way to improve the performance. More detail are in code comments.

Tested and compared the latency measured in ticks(NG4memcpy vs new M7memcpy).

1. Memset numbers(Aligned memset)

No.of bytes   NG4memset	   M7memset    	Delta ((B-A)/A)*100
	     (Avg.Ticks A) (Avg.Ticks B) (latency reduction)
  3		77		25		-67.53
  7		43		33		-23.25
  32		72		68		 -5.55
  128		164		44		-73.17
  256		335		68		-79.70
  512		511		220		-56.94
  1024		1552		627		-59.60
  2048		3515		1322		-62.38
  4096		6303		2472		-60.78
  8192		13118		4867		-62.89
  16384		26206		10371		-60.42
  32768		52501		18569		-64.63
  65536		100219		35899		-64.17

2. Memcpy numbers(Aligned memcpy)

No.of bytes   NG4memcpy	   M7memcpy    	Delta ((B-A)/A)*100
	     (Avg.Ticks A) (Avg.Ticks B) (latency reduction)
  3		20		19		-5
  7		29		27		-6.89
  32		30		28		-6.66
  128		89		69		-22.47
  256		142		143		 0.70
  512		341		283		-17.00
  1024		1588		655		-58.75
  2048		3553		1357		-61.80
  4096		7218		2590		-64.11
  8192		13701		5231		-61.82
  16384		28304		10716		-62.13
  32768		56516		22995		-59.31
  65536		115443		50840		-55.96

3. Memset numbers(un-aligned memset)

No.of bytes   NG4memset	   M7memset    	Delta ((B-A)/A)*100
	     (Avg.Ticks A) (Avg.Ticks B) (latency reduction)
  3		40		31		-22.5
  7		52		29		-44.2307692308
  32		89		86		-3.3707865169
  128		201		74		-63.184079602
  256		340		154		-54.7058823529
  512		961		335		-65.1404786681
  1024		1799		686		-61.8677042802
  2048		3575		1260		-64.7552447552
  4096		6560		2627		-59.9542682927
  8192		13161		6018		-54.273991338
  16384		26465		10439		-60.5554505951
  32768		52119		18649		-64.2184232238
  65536		101593		35724		-64.8361599717

4. Memcpy numbers(un-aligned memcpy)

No.of bytes   NG4memcpy	   M7memcpy    	Delta ((B-A)/A)*100
	     (Avg.Ticks A) (Avg.Ticks B) (latency reduction)
  3		26		19		-26.9230769231
  7		48		45		-6.25
  32		52		49		-5.7692307692
  128		284		334		17.6056338028
  256		430		482		12.0930232558
  512		646		690		6.8111455108
  1024		1051		1016		-3.3301617507
  2048		1787		1818		1.7347509793
  4096		3309		3376		2.0247809006
  8192		8151		7444		-8.673782358
  16384		34222		34556		0.9759803635
  32768		87851		95044		8.1877269468
  65536		158331		159572		0.7838010244

There is not much difference in numbers with Un-aligned copies
between NG4memcpy and M7memcpy because they both mostly use the
same algorithems.

v2:
 1. Fixed indentation issues found by David Miller
 2. Used ENTRY and ENDPROC for the labels in M7patch.S as suggested by David Miller
 3. Now M8 also will use M7memcpy. Also tested on M8 config.
 4. These patches are created on top of below M8 patches
    https://patchwork.ozlabs.org/patch/792661/
    https://patchwork.ozlabs.org/patch/792662/
    However, I did not see these patches in sparc-next tree. It may be in queue now.
    It is possible these patches might cause some build problems. It will resolve
    once all M8 patches are in sparc-next tree.

v0: Initial version
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      fa5dc772
    • B
      arch/sparc: Add accurate exception reporting in M7memcpy · 34060b8f
      由 Babu Moger 提交于 
      Add accurate exception reporting in M7memcpy
Signed-off-by: NBabu Moger <babu.moger@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      34060b8f
    • B
      arch/sparc: Optimized memcpy, memset, copy_to_user, copy_from_user for M7/M8 · b3a04ed5
      由 Babu Moger 提交于 
      New algorithm that takes advantage of the M7/M8 block init store
ASI, ie, overlapping pipelines and miss buffer filling.
Full details in code comments.
Signed-off-by: NBabu Moger <babu.moger@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      b3a04ed5
    • B
      arch/sparc: Rename exception handlers · 1ab32693
      由 Babu Moger 提交于 
      Rename exception handlers to memcpy_xxx as these
are going to be used by new memcpy routines and these
handlers are not exclusive to NG4memcpy anymore.
Signed-off-by: NBabu Moger <babu.moger@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      1ab32693
    • B
      arch/sparc: Separate the exception handlers from NG4memcpy · de5c073e
      由 Babu Moger 提交于 
      Separate the exception handlers from NG4memcpy so that it can be
used with new memcpy routines. Make a separate file for all these handlers.
Signed-off-by: NBabu Moger <babu.moger@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      de5c073e
    • S
      sparc64: update comments in U3memcpy · 061273f9
      由 Sam Ravnborg 提交于 
      Update comments about the range the different
parts of the code copies, the original comments were wrong.

Introduce a few descriptive labels too.

No functional changes.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      061273f9
    • D
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · 2f7043a3
      由 David S. Miller 提交于
      2f7043a3
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 26273939
      由 Linus Torvalds 提交于 
      Pull networking fixes from David Miller:

 1) Fix handling of initial STATE message in TIPC, from Jon Paul Maloy.

 2) Fix stats handling in bcm_sysport_get_stats(), from Florian
    Fainelli.

 3) Reject 16777215 VNI value in geneve_validate(), from Girish
    Moodalbail.

 4) Fix initial IGMP sysctl setting regression, from Nikolay Borisov.

 5) Once a UFO fragmented frame is treated as UFO, we should continue
    doing so. Likewise once a frame has been segmented, we should
    continue doing that and not try to convert it to a UFO frame. From
    Willem de Bruijn.

 6) Test the AF_PACKET RX/TX ring pg_vec state under the socket lock to
    prevent races. From Willem de Bruijn.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  packet: fix tp_reserve race in packet_set_ring
  udp: consistently apply ufo or fragmentation
  net: sched: set xt_tgchk_param par.nft_compat as 0 in ipt_init_target
  igmp: Fix regression caused by igmp sysctl namespace code.
  geneve: maximum value of VNI cannot be used
  net: systemport: Fix software statistics for SYSTEMPORT Lite
  tipc: remove premature ESTABLISH FSM event at link synchronization
      26273939
    • W
      packet: fix tp_reserve race in packet_set_ring · c27927e3
      由 Willem de Bruijn 提交于 
      Updates to tp_reserve can race with reads of the field in
packet_set_ring. Avoid this by holding the socket lock during
updates in setsockopt PACKET_RESERVE.

This bug was discovered by syzkaller.

Fixes: 8913336a ("packet: add PACKET_RESERVE sockopt")
Reported-by: NAndrey Konovalov <andreyknvl@google.com>
Signed-off-by: NWillem de Bruijn <willemb@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      c27927e3
    • W
      udp: consistently apply ufo or fragmentation · 85f1bd9a
      由 Willem de Bruijn 提交于 
      When iteratively building a UDP datagram with MSG_MORE and that
datagram exceeds MTU, consistently choose UFO or fragmentation.

Once skb_is_gso, always apply ufo. Conversely, once a datagram is
split across multiple skbs, do not consider ufo.

Sendpage already maintains the first invariant, only add the second.
IPv6 does not have a sendpage implementation to modify.

A gso skb must have a partial checksum, do not follow sk_no_check_tx
in udp_send_skb.

Found by syzkaller.

Fixes: e89e9cf5 ("[IPv4/IPv6]: UFO Scatter-gather approach")
Reported-by: NAndrey Konovalov <andreyknvl@google.com>
Signed-off-by: NWillem de Bruijn <willemb@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      85f1bd9a
    • D
      sparc64: Revert 16GB huge page support. · 4d9fbf53
      由 David S. Miller 提交于 
      It overflows the amount of space available in the initial .text section
of trap handler assembler in some configurations, resulting in build
failures.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      4d9fbf53
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · f213ad38
      由 Linus Torvalds 提交于 
      Pull sparc updates from David Miller:

 1) Recognize M8 cpus, just basic chip ID matching, from Allen Pais.

 2) Prevent crashes when bringing up sunvdc virtual block devices in
    some environments. From Jim Quigley.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sunvdc: prevent sunvdc panic when mpgroup disk added to guest domain
  sparc64: Increase max_phys_bits to 51 and VA bits to 53 for M8.
  sparc64: recognize and support sparc M8 cpu type
  sparc64: properly name the cpu constants
      f213ad38
  11. 10 8月, 2017 5 次提交
    • X
      net: sched: set xt_tgchk_param par.nft_compat as 0 in ipt_init_target · 96d97030
      由 Xin Long 提交于 
      Commit 55917a21 ("netfilter: x_tables: add context to know if
extension runs from nft_compat") introduced a member nft_compat to
xt_tgchk_param structure.

But it didn't set it's value for ipt_init_target. With unexpected
value in par.nft_compat, it may return unexpected result in some
target's checkentry.

This patch is to set all it's fields as 0 and only initialize the
non-zero fields in ipt_init_target.

v1->v2:
  As Wang Cong's suggestion, fix it by setting all it's fields as
  0 and only initializing the non-zero fields.

Fixes: 55917a21 ("netfilter: x_tables: add context to know if extension runs from nft_compat")
Suggested-by: NCong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      96d97030
    • N
      igmp: Fix regression caused by igmp sysctl namespace code. · 1714020e
      由 Nikolay Borisov 提交于 
      Commit dcd87999 ("igmp: net: Move igmp namespace init to correct file")
moved the igmp sysctls initialization from tcp_sk_init to igmp_net_init. This
function is only called as part of per-namespace initialization, only if
CONFIG_IP_MULTICAST is defined, otherwise igmp_mc_init() call in ip_init is
compiled out, casuing the igmp pernet ops to not be registerd and those sysctl
being left initialized with 0. However, there are certain functions, such as
ip_mc_join_group which are always compiled and make use of some of those
sysctls. Let's do a partial revert of the aforementioned commit and move the
sysctl initialization into inet_init_net, that way they will always have
sane values.

Fixes: dcd87999 ("igmp: net: Move igmp namespace init to correct file")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=196595Reported-by: NGerardo Exequiel Pozzi <vmlinuz386@gmail.com>
Signed-off-by: NNikolay Borisov <nborisov@suse.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      1714020e
    • G
      geneve: maximum value of VNI cannot be used · 04db70d9
      由 Girish Moodalbail 提交于 
      Geneve's Virtual Network Identifier (VNI) is 24 bit long, so the range
of values for it would be from 0 to 16777215 (2^24 -1).  However, one
cannot create a geneve device with VNI set to 16777215. This patch fixes
this issue.
Signed-off-by: NGirish Moodalbail <girish.moodalbail@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      04db70d9
    • F
      net: systemport: Fix software statistics for SYSTEMPORT Lite · 50ddfbaf
      由 Florian Fainelli 提交于 
      With SYSTEMPORT Lite we have holes in our statistics layout that make us
skip over the hardware MIB counters, bcm_sysport_get_stats() was not
taking that into account resulting in reporting 0 for all SW-maintained
statistics, fix this by skipping accordingly.

Fixes: 44a4524c ("net: systemport: Add support for SYSTEMPORT Lite")
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      50ddfbaf
    • J
      tipc: remove premature ESTABLISH FSM event at link synchronization · ed43594a
      由 Jon Paul Maloy 提交于 
      When a link between two nodes come up, both endpoints will initially
send out a STATE message to the peer, to increase the probability that
the peer endpoint also is up when the first traffic message arrives.
Thereafter, if the establishing link is the second link between two
nodes, this first "traffic" message is a TUNNEL_PROTOCOL/SYNCH message,
helping the peer to perform initial synchronization between the two
links.

However, the initial STATE message may be lost, in which case the SYNCH
message will be the first one arriving at the peer. This should also
work, as the SYNCH message itself will be used to take up the link
endpoint before  initializing synchronization.

Unfortunately the code for this case is broken. Currently, the link is
brought up through a tipc_link_fsm_evt(ESTABLISHED) when a SYNCH
arrives, whereupon __tipc_node_link_up() is called to distribute the
link slots and take the link into traffic. But, __tipc_node_link_up() is
itself starting with a test for whether the link is up, and if true,
returns without action. Clearly, the tipc_link_fsm_evt(ESTABLISHED) call
is unnecessary, since tipc_node_link_up() is itself issuing such an
event, but also harmful, since it inhibits tipc_node_link_up() to
perform the test of its tasks, and the link endpoint in question hence
is never taken into traffic.

This problem has been exposed when we set up dual links between pre-
and post-4.4 kernels, because the former ones don't send out the
initial STATE message described above.

We fix this by removing the unnecessary event call.
Signed-off-by: NJon Maloy <jon.maloy@ericsson.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      ed43594a