- 12 Feb, 2016 8 commits
-
-
Edward Cree authored
Signed-off-by:
Edward Cree <ecree@solarflare.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
-
Edward Cree authored
Signed-off-by:
-
Edward Cree authored
The only protocol affected at present is Geneve. Signed-off-by:
-
Edward Cree authored
If the dst device doesn't support it, it'll get fixed up later anyway by validate_xmit_skb(). Also, this allows us to take advantage of LCO to avoid summing the payload multiple times. Signed-off-by:
-
Edward Cree authored
The arithmetic properties of the ones-complement checksum mean that a correctly checksummed inner packet, including its checksum, has a ones complement sum depending only on whatever value was used to initialise the checksum field before checksumming (in the case of TCP and UDP, this is the ones complement sum of the pseudo header, complemented). Consequently, if we are going to offload the inner checksum with CHECKSUM_PARTIAL, we can compute the outer checksum based only on the packed data not covered by the inner checksum, and the initial value of the inner checksum field. Signed-off-by:
-
David S. Miller authored
Eric Dumazet says: ==================== tcp/dccp: better use of ephemeral ports Big servers have bloated bind table, making very hard to succeed ephemeral port allocations, without special containers/namespace tricks. This patch series extends the strategy added in commit 07f4c900 ("tcp/dccp: try to not exhaust ip_local_port_range in connect()"). Since ports used by connect() are much likely to be shared among them, we give a hint to both bind() and connect() to keep the crowds separated if possible. Of course, if on a specific host an application needs to allocate ~30000 ports using bind(), it will still be able to do so. Same for ~30000 connect() to a unique 2-tuple (dst addr, dst port) New implemetation is also more friendly to softirqs and reschedules. v2: rebase after TCP SO_REUSEPORT changes ==================== Signed-off-by:
-
Eric Dumazet authored
Implement strategy used in __inet_hash_connect() in opposite way : Try to find a candidate using odd ports, then fallback to even ports. We no longer disable BH for whole traversal, but one bucket at a time. We also use cond_resched() to yield cpu to other tasks if needed. I removed one indentation level and tried to mirror the loop we have in __inet_hash_connect() and variable names to ease code maintenance. Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
-
Eric Dumazet authored
In commit 07f4c900 ("tcp/dccp: try to not exhaust ip_local_port_range in connect()"), I added a very simple heuristic, so that we got better chances to use even ports, and allow bind() users to have more available slots. It gave nice results, but with more than 200,000 TCP sessions on a typical server, the ~30,000 ephemeral ports are still a rare resource. I chose to go a step further, by looking at all even ports, and if none was available, fallback to odd ports. The companion patch does the same in bind(), but in opposite way. I've seen exec times of up to 30ms on busy servers, so I no longer disable BH for the whole traversal, but only for each hash bucket. I also call cond_resched() to be gentle to other tasks. Signed-off-by:
-
- 11 Feb, 2016 32 commits
-
-
David S. Miller authored
Jesper Dangaard Brouer says: ==================== net: mitigating kmem_cache free slowpath This patchset is the first real use-case for kmem_cache bulk _free_. The use of bulk _alloc_ is NOT included in this patchset. The full use have previously been posted here [1]. The bulk free side have the largest benefit for the network stack use-case, because network stack is hitting the kmem_cache/SLUB slowpath when freeing SKBs, due to the amount of outstanding SKBs. This is solved by using the new API kmem_cache_free_bulk(). Introduce new API napi_consume_skb(), that hides/handles bulk freeing for the caller. The drivers simply need to use this call when freeing SKBs in NAPI context, e.g. replacing their calles to dev_kfree_skb() / dev_consume_skb_any(). Driver ixgbe is the first user of this new API. [1] http://thread.gmane.org/gmane.linux.network/384302/focus=397373 ==================== Signed-off-by:
-
Jesper Dangaard Brouer authored
There is an opportunity to bulk free SKBs during reclaiming of resources after DMA transmit completes in ixgbe_clean_tx_irq. Thus, bulk freeing at this point does not introduce any added latency. Simply use napi_consume_skb() which were recently introduced. The napi_budget parameter is needed by napi_consume_skb() to detect if it is called from netpoll. Benchmarking IPv4-forwarding, on CPU i7-4790K @4.2GHz (no turbo boost) Single CPU/flow numbers: before: 1982144 pps -> after : 2064446 pps Improvement: +82302 pps, -20 nanosec, +4.1% (SLUB and GCC version 5.1.1 20150618 (Red Hat 5.1.1-4)) Joint work with Alexander Duyck. Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by:
Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by:
-
Jesper Dangaard Brouer authored
The network stack defers SKBs free, in-case free happens in IRQ or when IRQs are disabled. This happens in __dev_kfree_skb_irq() that writes SKBs that were free'ed during IRQ to the softirq completion queue (softnet_data.completion_queue). These SKBs are naturally delayed, and cleaned up during NET_TX_SOFTIRQ in function net_tx_action(). Take advantage of this a use the skb defer and flush API, as we are already in softirq context. For modern drivers this rarely happens. Although most drivers do call dev_kfree_skb_any(), which detects the situation and calls __dev_kfree_skb_irq() when needed. This due to netpoll can call from IRQ context. Signed-off-by:
-
Jesper Dangaard Brouer authored
Discovered that network stack were hitting the kmem_cache/SLUB slowpath when freeing SKBs. Doing bulk free with kmem_cache_free_bulk can speedup this slowpath. NAPI context is a bit special, lets take advantage of that for bulk free'ing SKBs. In NAPI context we are running in softirq, which gives us certain protection. A softirq can run on several CPUs at once. BUT the important part is a softirq will never preempt another softirq running on the same CPU. This gives us the opportunity to access per-cpu variables in softirq context. Extend napi_alloc_cache (before only contained page_frag_cache) to be a struct with a small array based stack for holding SKBs. Introduce a SKB defer and flush API for accessing this. Introduce napi_consume_skb() as replacement for e.g. dev_consume_skb_any() when running in NAPI context. A small trick to handle/detect if we are called from netpoll is to see if budget is 0. In that case, we need to invoke dev_consume_skb_irq(). Joint work with Alexander Duyck. Signed-off-by:
-
David S. Miller authored
Nikolay Aleksandrov says: ==================== virtio_net: better ethtool setting validation This small set is a follow-up for the recent patches that added ethtool get/set settings. Patch 1 changes the speed validation routine to check if the speed is between 0 and INT_MAX (or SPEED_UNKNOWN) and patch 2 adds port validation to virtio_net and better validation comment. This set is on top of Michael's patch which explains that speeds from 0 to INT_MAX are valid: http://patchwork.ozlabs.org/patch/578911/ ==================== Signed-off-by:
-
Nikolay Aleksandrov authored
We should validate the port setting that we got from the user and check if it's what we've set it to (PORT_OTHER), also add explanation that ignoring advertising is good as long as we don't have autonegotiation. Signed-off-by:
Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Acked-by:
Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
-
Nikolay Aleksandrov authored
Devices these days can have any speed and as was recently pointed out any speed from 0 to INT_MAX is valid so adjust speed validation to accept such values. Signed-off-by:
-
David S. Miller authored
Andrew F. Davis says: ==================== net: phy: dp83848: Add support for TI TLK10x Ethernet PHYs This series is [0] split into its logical components. ==================== Signed-off-by: -
Andrew F. Davis authored
Signed-off-by:
Andrew F. Davis <afd@ti.com> Signed-off-by:
-
Andrew F. Davis authored
The TI TLK10x Ethernet PHYs are similar in the interrupt relevant registers and so are compatible with the DP83848x devices already supported. Signed-off-by:
-
Andrew F. Davis authored
Reorganize code by moving the desired interrupt mask definition out of function. Also rearrange the enable/disable interrupt function to prevent accidental over-writing of values in registers. Signed-off-by:
-
Andrew F. Davis authored
After acquiring National Semiconductor, TI appears to have changed the Vendor Model Number for the DP83848C PHYs, add this new ID to supported IDs. Signed-off-by:
-
Andrew F. Davis authored
Add a helper macro for defining dp83848 compatible phy devices. Update copyright info. Signed-off-by:
-
Ivan Vecera authored
The EVB (virtual bridge) functionality should be disabled on older BE3 and Lancer chips if SR-IOV is disabled in the NIC's BIOS. This setting is identified by the zero value of total VFs reported by the card. The GET_HSW_CONFIG command cannot be used as it is not supported by these older chipset's FW. v2: added the comment Cc: Sathya Perla <sathya.perla@broadcom.com> Cc: Ajit Khaparde <ajit.khaparde@broadcom.com> Cc: Padmanabh Ratnakar <padmanabh.ratnakar@broadcom.com> Cc: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com> Cc: Somnath Kotur <somnath.kotur@broadcom.com> Signed-off-by:
Ivan Vecera <ivecera@redhat.com> Acked-by:
Sathya Perla <sathya.perla@broadcom.com> Signed-off-by:
-
David S. Miller authored
Helmut Buchsbaum says: ==================== Add support for MICREL KSZ8795CLX 5-port switch This patch series refactors the spi-ks8995 driver to finally add support for the MICREL KSZ8795CLX. Additionally support for controlling a GPIO line for resetting the switch is added. Helmut Changes since v2: - use GPIO_ACTIVE_LOW according to Andrew's remark. - use ePAPR compliant node name in example, thanks to Sergei for pointing out Changes since v1: - removed initializing registers from Device Tree following Florian's advice - fixed GPIO handling for reset according to Andrew's remark. ==================== Signed-off-by: -
Helmut Buchsbaum authored
Signed-off-by:
Helmut Buchsbaum <helmut.buchsbaum@gmail.com> Signed-off-by:
-
Helmut Buchsbaum authored
Add support for MICREL KSZ8795CLX Integrated 5-Port, 10-/100-Managed Ethernet Switch with Gigabit GMII/RGMII and MII/RMII interfaces. Signed-off-by:
-
Helmut Buchsbaum authored
Prepare creating SPI reads and writes for other switch families. The KS8995 family uses the straight forward <8bit CMD><8bit ADDR> sequence. To be able to support KSZ8795 family, which uses <3bit CMD><12bit ADDR><1 bit TR> make the SPI command creation chip variant dependent. Signed-off-by:
-
Helmut Buchsbaum authored
When using device tree it is no more possible to reset the PHY at board level. Furthermore, doing in the driver allows to power down the switch when it is not used any more. The patch introduces a new optional property "reset-gpios" denoting an appropriate GPIO handle, e.g.: reset-gpios = <&gpio0 46 GPIO_ACTIVE_LOW> Signed-off-by:
-
Helmut Buchsbaum authored
Since the chip variant is now determined by spi_device_id, verify family and chip id and determine the revision id. Signed-off-by:
-
Helmut Buchsbaum authored
Refactor to use spi_device_id table to facilitate easy extendability. Signed-off-by:
-
David S. Miller authored
Sunil Goutham says: ==================== net: thunderx: Setting IRQ affinity hints and other optimizations This patch series contains changes - To add support for virtual function's irq affinity hint - Replace napi_schedule() with napi_schedule_irqoff() - Reduce page allocation overhead by allocating pages of higher order when pagesize is 4KB. - Add couple of stats which helps in debugging - Some miscellaneous changes to BGX driver. Changes from v1: - As suggested changed MAC address invalid log message to dev_err() instead of dev_warn(). ==================== Signed-off-by: -
Sunil Goutham authored
Allocate higher order pages when pagesize is small, this will reduce number of calls to page allocator and wastage of memory. Signed-off-by:
Sunil Goutham <sgoutham@cavium.com> Signed-off-by:
-
Robert Richter authored
Signed-off-by:
Robert Richter <rrichter@cavium.com> Signed-off-by:
-
David Daney authored
In the case of OF device tree, the firmware information is attached to the BGX device structure in the standard manner, so use the firmware iterators and accessors where possible. Signed-off-by:
David Daney <david.daney@cavium.com> Signed-off-by:
-
Sunil Goutham authored
This affinity hint can be used by user space irqbalance tool to set preferred CPU mask for irqs registered by this VF. Irqbalance needs to be in 'exact' mode to set irq affinity same as indicated by affinity hint. Signed-off-by:
-
Sunil Goutham authored
napi_schedule is being called from hard irq context, hence switch to napi_schedule_irqoff which avoids unneeded call to local_irq_save and local_irq_restore. Signed-off-by:
-
Thanneeru Srinivasulu authored
When system is low on atomic memory, too many error messages are logged. Since this is not a total failure but a simple switch to non-atomic allocation better to have a stat. Also add a stat for reset, kicked due to transmit watchdog timeout. Signed-off-by:
Thanneeru Srinivasulu <tsrinivasulu@caviumnetworks.com> Signed-off-by:
-
David S. Miller authored
Nikolay Borisov says: ==================== Make igmp sysctl knobs namespace aware This series continue making more of the net related sysctls namespace aware. The first 2 and last patches are straight forward and convert sysctls which weren't defined to be namespace aware. The only thing in them is that each removes a define which is used in only one place (to initialise the respective sysctl) so I don't think this is a huge loss. The third patch however, converts igmp_llm_reports which was already defined in the ipv4_net_table but wasn't using any of the net namespace infrastructure. ==================== Signed-off-by: -
Nikolay Borisov authored
Signed-off-by:
Nikolay Borisov <kernel@kyup.com> Signed-off-by:
-
Nikolay Borisov authored
This was initially introduced in df2cf4a7 ("IGMP: Inhibit reports for local multicast groups") by defining the sysctl in the ipv4_net_table array, however it was never implemented to be namespace aware. Fix this by changing the code accordingly. Signed-off-by:
-
Nikolay Borisov authored
Signed-off-by:
-
