- 20 Jul, 2017 7 commits
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stephen hemminger authored
Keep back pointer in the per-channel data structure to avoid any possible RCU related issues when napi poll is called but netvsc_device is in RCU limbo. Signed-off-by:
Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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stephen hemminger authored
The netvsc_device structure should be accessed by rcu_dereference in the send path. Change arguments to netvsc_send() to make this easier to do correctly. Remove no longer needed hv_device_to_netvsc_device. Signed-off-by:
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stephen hemminger authored
The rndis_filter_device_add function is called both in probe context and RTNL context,and creates the netvsc_device inner structure. It is easier to get the RTNL lock annotation correct if it returns the object directly, rather than implicitly by updating network device private data. Signed-off-by:
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stephen hemminger authored
Use device detach/attach to ensure that no packets are handed to device during state changes. Call rndis_filter_open/close directly as part of later VF related changes. Signed-off-by:
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stephen hemminger authored
This fixes the error unwind logic for incorrect number of queues. If netif_set_real_num_XX_queues failed then rndis_filter_device_add would have been called twice. Since input arguments are already ranged checked this is a hypothetical only problem, not possible in actual code. Signed-off-by:
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stephen hemminger authored
In a couple places RTNL is held, and the netvsc_device pointer is acquired without annotation. Signed-off-by:
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stephen hemminger authored
If two MTU changes are in less than update interval (2 seconds), then the netvsc network device may get stuck with no carrier. The netvsc driver debounces link status events which is fine for unsolicited updates, but blocks getting the update after down/up from MTU reinitialization. Signed-off-by:
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- 19 Jul, 2017 23 commits
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David S. Miller authored
Stephen Hemminger says: ==================== net: make dev_close void Noticed while working on other changes. Why is dev_close() returning int, it should be void. Should also change ndo_close to be void, but that requires more work and someone with more coccinelle foo (smpl) than me. ==================== Signed-off-by: -
stephen hemminger authored
There is no useful return value from dev_close. All paths return 0. Change dev_close and helper functions to void. Signed-off-by:
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stephen hemminger authored
There is no need to cast away return value of dev_close. Signed-off-by:
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stephen hemminger authored
The function dev_close in current kernel will never return an error. Later changes will make it void. Signed-off-by:
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Gustavo A. R. Silva authored
Remove unnecessary static on local variables cpu_id_modulus and cpu_id. Such variables are initialized before being used, on every execution path throughout the function. The static has no benefit and, removing it reduces the object file size. This issue was detected using Coccinelle and the following semantic patch: @bad exists@ position p; identifier x; type T; @@ static T x@p; ... x = <+...x...+> @@ identifier x; expression e; type T; position p != bad.p; @@ -static T x@p; ... when != x when strict ?x = e; In the following log you can see a significant difference in the object file size. Also, there is a significant difference in the bss segment. This log is the output of the size command, before and after the code change: before: text data bss dec hex filename 78689 15272 27808 121769 1dba9 drivers/net/ethernet/cavium/liquidio/lio_main.o after: text data bss dec hex filename 78667 15128 27680 121475 1da83 drivers/net/ethernet/cavium/liquidio/lio_main.o Signed-off-by:Gustavo A. R. Silva <gustavo@embeddedor.com> Acked-by:
Felix Manlunas <felix.manlunas@cavium.com> Signed-off-by:
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Gustavo A. R. Silva authored
Remove unnecessary static on local variables cpu_id_modulus and cpu_id. Such variables are initialized before being used, on every execution path throughout the function. The static has no benefit and, removing it reduces the object file size. This issue was detected using Coccinelle and the following semantic patch: @bad exists@ position p; identifier x; type T; @@ static T x@p; ... x = <+...x...+> @@ identifier x; expression e; type T; position p != bad.p; @@ -static T x@p; ... when != x when strict ?x = e; In the following log you can see a significant difference in the object file size. Also, there is a significant difference in the bss segment. This log is the output of the size command, before and after the code change: before: text data bss dec hex filename 55656 10680 576 66912 10560 drivers/net/ethernet/cavium/liquidio/lio_vf_main.o after: text data bss dec hex filename 55796 10536 448 66780 104dc drivers/net/ethernet/cavium/liquidio/lio_vf_main.o Signed-off-by: -
Gustavo A. R. Silva authored
Remove useless local variable _condition_ and the code related. Signed-off-by:
Sean Wang <sean.wang@mediatek.com> Signed-off-by:
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Gustavo A. R. Silva authored
Remove unnecessary static on local variable fw_dump_ops. Such variable is initialized before being used, on every execution path throughout the function. The static has no benefit and, removing it reduces the object file size. This issue was detected using Coccinelle and the following semantic patch: @bad exists@ position p; identifier x; type T; @@ static T x@p; ... x = <+...x...+> @@ identifier x; expression e; type T; position p != bad.p; @@ -static T x@p; ... when != x when strict ?x = e; In the following log you can see a difference in the object file size. This log is the output of the size command, before and after the code change: before: text data bss dec hex filename 19032 2136 64 21232 52f0 drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.o after: text data bss dec hex filename 19020 2048 0 21068 524c drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.o Signed-off-by: -
Gustavo A. R. Silva authored
Remove useless local variable multiport_cnt and the code related. Signed-off-by:
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Gustavo A. R. Silva authored
Remove useless local variables last_read_point and last_txw_point and the code related. Signed-off-by:
Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by:
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Gustavo A. R. Silva authored
Remove unnecessary static on local function pointer _writer_. Such pointer is initialized before being used, on every execution path throughout the function. The static has no benefit and, removing it reduces the object file size. This issue was detected using Coccinelle and the following semantic patch: @bad exists@ position p; identifier x; type T; @@ static T x@p; ... x = <+...x...+> @@ identifier x; expression e; type T; position p != bad.p; @@ -static T x@p; ... when != x when strict ?x = e; In the following log you can see a significant difference in the object file size. This log is the output of the size command, before and after the code change: before: text data bss dec hex filename 113797 19152 1216 134165 20c15 drivers/net/wireless/cisco/airo.o after: text data bss dec hex filename 113881 19096 1152 134129 20bf1 drivers/net/wireless/cisco/airo.o Signed-off-by: -
Vivien Didelot authored
The dsa_is_port_initialized helper is only used by dsa_switch_resume and dsa_switch_suspend, if CONFIG_PM_SLEEP is enabled. Make it static to dsa.c. Signed-off-by:
Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by:
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Rosen, Rami authored
This patch removes the definition of PGV_FROM_VMALLOC from af_packet.c. The PGV_FROM_VMALLOC definition was already removed by commit 441c793a ("net: cleanup unused macros in net directory"), and its usage was removed even before by commit c56b4d90 ("af_packet: remove pgv.flags"); but it was added back by mistake later on, in commit f6fb8f10 ("af-packet: TPACKET_V3 flexible buffer implementation"). Signed-off-by:
Rami Rosen <rami.rosen@intel.com> Signed-off-by:
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Andy Shevchenko authored
Two arrays are clearly bit maps, so, make that explicit by converting to bitmap API and remove custom helpers. Note sig_ind() uses out of boundary bit to (looks like) protect against potential bitmap_empty() checks for the same bitmap. This patch removes that since: 1) that didn't guarantee atomicity anyway; 2) the first operation inside the for-loop is set bit in the bitmap (which effectively makes it non-empty); 3) group_optimization() doesn't utilize possible emptiness of the bitmap in question. Thus, if there is a protection needed it should be implemented properly. Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
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Martin Habets authored
This also adds support for non-QSFP modules attached to QSFP. Signed-off-by:
Martin Habets <mhabets@solarflare.com> Signed-off-by:
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Yuchung Cheng authored
This patch adjusts the timeout formula to schedule the TCP loss probe (TLP). The previous formula uses 2*SRTT or 1.5*RTT + DelayACKMax if only one packet is in flight. It keeps a lower bound of 10 msec which is too large for short RTT connections (e.g. within a data-center). The new formula = 2*RTT + (inflight == 1 ? 200ms : 2ticks) which performs better for short and fast connections. Signed-off-by:
Yuchung Cheng <ycheng@google.com> Signed-off-by:
Neal Cardwell <ncardwell@google.com> Signed-off-by:
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Tonghao Zhang authored
When calling the flow_free() to free the flow, we call many times (cpu_possible_mask, eg. 128 as default) cpumask_next(). That will take up our CPU usage if we call the flow_free() frequently. When we put all packets to userspace via upcall, and OvS will send them back via netlink to ovs_packet_cmd_execute(will call flow_free). The test topo is shown as below. VM01 sends TCP packets to VM02, and OvS forward packtets. When testing, we use perf to report the system performance. VM01 --- OvS-VM --- VM02 Without this patch, perf-top show as below: The flow_free() is 3.02% CPU usage. 4.23% [kernel] [k] _raw_spin_unlock_irqrestore 3.62% [kernel] [k] __do_softirq 3.16% [kernel] [k] __memcpy 3.02% [kernel] [k] flow_free 2.42% libc-2.17.so [.] __memcpy_ssse3_back 2.18% [kernel] [k] copy_user_generic_unrolled 2.17% [kernel] [k] find_next_bit When applied this patch, perf-top show as below: Not shown on the list anymore. 4.11% [kernel] [k] _raw_spin_unlock_irqrestore 3.79% [kernel] [k] __do_softirq 3.46% [kernel] [k] __memcpy 2.73% libc-2.17.so [.] __memcpy_ssse3_back 2.25% [kernel] [k] copy_user_generic_unrolled 1.89% libc-2.17.so [.] _int_malloc 1.53% ovs-vswitchd [.] xlate_actions With this patch, the TCP throughput(we dont use Megaflow Cache + Microflow Cache) between VMs is 1.18Gbs/sec up to 1.30Gbs/sec (maybe ~10% performance imporve). This patch adds cpumask struct, the cpu_used_mask stores the cpu_id that the flow used. And we only check the flow_stats on the cpu we used, and it is unncessary to check all possible cpu when getting, cleaning, and updating the flow_stats. Adding the cpu_used_mask to sw_flow struct does’t increase the cacheline number. Signed-off-by:
Tonghao Zhang <xiangxia.m.yue@gmail.com> Acked-by:
Pravin B Shelar <pshelar@ovn.org> Signed-off-by:
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Tonghao Zhang authored
In the ovs_flow_stats_update(), we only use the node var to alloc flow_stats struct. But this is not a common case, it is unnecessary to call the numa_node_id() everytime. This patch is not a bugfix, but there maybe a small increase. Signed-off-by:
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David S. Miller authored
Rick Farrington says: ==================== liquidio: avoid vm low memory crashes This patchset addresses issues brought about by low memory conditions in a VM. These conditions were not seen when the driver was exercised normally. Rather, they were brought about through manual fault injection. They are being included in the interest of hardening the driver against unforeseen circumstances. 1. Fix GPF in octeon_init_droq(); zero the allocated block 'recv_buf_list'. This prevents a GPF trying to access an invalid 'recv_buf_list[i]' entry in octeon_droq_destroy_ring_buffers() if init didn't alloc all entries. 2. Don't dereference a NULL ptr in octeon_droq_destroy_ring_buffers(). 3. For defensive programming, zero the allocated block 'oct->droq' in octeon_setup_output_queues() and 'oct->instr_queue' in octeon_setup_instr_queues(). change log: V1 -> V2: 1. Corrected syntax in 'Subject' lines; no functional or code changes. ==================== Signed-off-by: -
Rick Farrington authored
For defensive programming, zero the allocated block 'oct->droq[0]' in octeon_setup_output_queues() and 'oct->instr_queue[0]' in octeon_setup_instr_queues(). Signed-off-by:
Rick Farrington <ricardo.farrington@cavium.com> Signed-off-by:
Satanand Burla <satananda.burla@cavium.com> Signed-off-by:
Raghu Vatsavayi <raghu.vatsavayi@cavium.com> Signed-off-by:
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Rick Farrington authored
Don't dereference a NULL ptr in octeon_droq_destroy_ring_buffers(). Signed-off-by:
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Rick Farrington authored
Fix GPF in octeon_init_droq(); zero the allocated block 'recv_buf_list'. This prevents a GPF trying to access an invalid 'recv_buf_list[i]' entry in octeon_droq_destroy_ring_buffers() if init didn't alloc all entries. Signed-off-by:
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Rick Farrington authored
Added support for new firmware statistic 'tx_err_pki'. Signed-off-by:
Derek Chickles <derek.chickles@cavium.com> Signed-off-by:
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- 18 Jul, 2017 10 commits
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David S. Miller authored
Arvind Yadav says: ==================== constify net attribute_group structures. attribute_group are not supposed to change at runtime. All functions working with attribute_group provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. ==================== Signed-off-by: -
Arvind Yadav authored
attribute_group are not supposed to change at runtime. All functions working with attribute_group provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 28720 985 12 29717 7415 net/.../cxgb3/cxgb3_main.o File size After adding 'const': text data bss dec hex filename 28848 857 12 29717 7415 net/.../cxgb3/cxgb3_main.o Signed-off-by:
Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by:
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Arvind Yadav authored
attribute_group are not supposed to change at runtime. All functions working with attribute_group provided by <linux/netdevice.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 4512 1472 0 5984 1760 drivers/net/bonding/bond_sysfs.o File size After adding 'const': text data bss dec hex filename 4576 1408 0 5984 1760 drivers/net/bonding/bond_sysfs.o Signed-off-by:
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Arvind Yadav authored
attribute_group are not supposed to change at runtime. All functions working with attribute_group provided by <linux/netdevice.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 3409 948 28 4385 1121 drivers/net/arcnet/com20020-pci.o File size After adding 'const': text data bss dec hex filename 3473 884 28 4385 1121 drivers/net/arcnet/com20020-pci.o Signed-off-by:
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Arvind Yadav authored
attribute_group are not supposed to change at runtime. All functions working with attribute_group provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. Signed-off-by:
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Arvind Yadav authored
attribute_group are not supposed to change at runtime. All functions working with attribute_group provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. Signed-off-by:
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Arvind Yadav authored
attribute_group are not supposed to change at runtime. All functions working with attribute_group provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. Signed-off-by:
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Arvind Yadav authored
attribute_group are not supposed to change at runtime. All functions working with attribute_group provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. Signed-off-by:
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Arvind Yadav authored
attribute_group are not supposed to change at runtime. All functions working with attribute_group provided by <linux/netdevice.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 11800 368 0 12168 2f88 drivers/net/can/janz-ican3.o File size After adding 'const': text data bss dec hex filename 11864 304 0 12168 2f88 drivers/net/can/janz-ican3.o Signed-off-by:
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Arvind Yadav authored
attribute_group are not supposed to change at runtime. All functions working with attribute_group provided by <linux/netdevice.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 6164 304 0 6468 1944 drivers/net/can/at91_can.o File size After adding 'const': text data bss dec hex filename 6228 240 0 6468 1944 drivers/net/can/at91_can.o Signed-off-by:
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