- 24 Apr, 2020 22 commits
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Mordechay Goodstein authored
Driver tells mac80211 to sends ADDBA with SSN (starting sequence number) from the head of the queue, while the transmission of all the frames in the queue may take a while, which causes the peer to time out. In order to fix this scenario, add an option to defer ADDBA transmit until queue is drained. Signed-off-by:
Mordechay Goodstein <mordechay.goodstein@intel.com> Signed-off-by:
Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20200326150855.0f27423fec75.If67daab123a27c1cbddef000d6a3f212aa6309ef@changeidSigned-off-by:
Johannes Berg <johannes.berg@intel.com>
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Mordechay Goodstein authored
We move the actual arming the timer and sending ADDBA to a function for the use in different places calling the same logic. Signed-off-by:
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Ilan Peer authored
When parsing supported rates IE. Signed-off-by:
Ilan Peer <ilan.peer@intel.com> Signed-off-by:
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Ilan Peer authored
This extends the support for drivers that rebuilds IEs in the FW (same as with HT/VHT). Signed-off-by:
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Andrei Otcheretianski authored
SAE AP may reject authentication with WLAN_STATUS_ANTI_CLOG_REQUIRED. As the user space will immediately continue the authentication flow, there is no need to destroy the authentication data in this case. This saves unneeded station removal and releasing the channel. Signed-off-by:
Andrei Otcheretianski <andrei.otcheretianski@intel.com> Signed-off-by:
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Shaul Triebitz authored
Add a flag to the BSS conf whether the BSS and STA support protected TWT. Signed-off-by:
Shaul Triebitz <shaul.triebitz@intel.com> Signed-off-by:
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Johannes Berg authored
Somehow we missed this for a long time, but similar to the extended NSS support in VHT capabilities, we need to have this in Operating Mode notification. Implement it by * parsing the 160/80+80 bit there and setting the bandwidth appropriately * having callers of ieee80211_get_vht_max_nss() pass in the current max NSS value as received in the operating mode notification in order to modify it appropriately depending on the extended NSS bits. This updates all drivers that use it, i.e. only iwlwifi/mvm. Signed-off-by:
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Jouni Malinen authored
Convert a user space registration for processing multicast Action frames (NL80211_CMD_REGISTER_FRAME with NL80211_ATTR_RECEIVE_MULTICAST) to a new enum ieee80211_filter_flags bit FIF_MCAST_ACTION so that drivers can update their RX filter parameters appropriately, if needed. Signed-off-by:
Jouni Malinen <jouni@codeaurora.org> Link: https://lore.kernel.org/r/20200421144815.19175-1-jouni@codeaurora.org [rename variables to rx_mcast_action_reg indicating action frames only] Signed-off-by:
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Johannes Berg authored
The current NL80211_EXT_FEATURE_BEACON_PROTECTION feature flag requires both AP and client support, add a new one called NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT that enables only support in client (and P2P-client) modes. Link: https://lore.kernel.org/r/20200420140559.6ba704053a5a.Ifeb869fb0b48e52fe0cb9c15572b93ac8a924f8d@changeidSigned-off-by:
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Johannes Berg authored
For DPP, there's a need to receive multicast action frames, but many drivers need a special filter configuration for this. Support announcing from userspace in the management registration that multicast RX is required, with an extended feature flag if the driver handles this. Signed-off-by:
Sergey Matyukevich <sergey.matyukevich.os@quantenna.com> Link: https://lore.kernel.org/r/20200417124013.c46238801048.Ib041d437ce0bff28a0c6d5dc915f68f1d8591002@changeidSigned-off-by:
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Johannes Berg authored
Almost all drivers below cfg80211 get the API wrong (except for cfg80211) and are unable to cope with multiple registrations for the same frame type, which is valid due to the match filter. This seems to indicate the API is wrong, and we should maintain the full information in cfg80211 instead of the drivers. Change the API to no longer inform the driver about individual registrations and unregistrations, but rather every time about the entire state of the entire wiphy and single wdev, whenever it may have changed. This also simplifies the code in cfg80211 as it no longer has to track exactly what was unregistered and can free things immediately. Signed-off-by:
Arend van Spriel <arend.vanspriel@broadcom.com> Reviewed-by:
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Jouni Malinen authored
Report received Beacon frames that do not have a valid MME MIC when beacon protection is enabled. This covers both the cases of no MME in the received frame and invalid MIC in the MME. Signed-off-by:
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Jouni Malinen authored
Extend cfg80211_rx_unprot_mlme_mgmt() to cover indication of unprotected Beacon frames in addition to the previously used Deauthentication and Disassociation frames. The Beacon frame case is quite similar, but has couple of exceptions: this is used both with fully unprotected and also incorrectly protected frames and there is a rate limit on the events to avoid unnecessary flooding netlink events in case something goes wrong. Signed-off-by:
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Johannes Berg authored
There are two bugs with this, first, it shouldn't be called on an interface that's down, and secondly, it should then be called when the interface comes up. Note that the currently only user (iwlwifi) doesn't seem to care about either of these scenarios. Signed-off-by:
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Johannes Berg authored
Maintain the connection AID only in sdata->vif.bss_conf.aid, not also in sdata->u.mgd.aid. Keep setting that where we set ifmgd->aid before, which has the side effect of exposing the AID to the driver before the station entry (AP) is marked associated, in case it needs it then. Requested-by:
Felix Fietkau <nbd@nbd.name> Signed-off-by:
Lorenzo Bianconi <lorenzo@kernel.org> Link: https://lore.kernel.org/r/20200417123802.085d4a322b0c.I2e7a2ceceea8c6880219f9e9ee4d4ac985fd295a@changeidSigned-off-by:
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Johannes Berg authored
Currently, wmediumd requires each used MAC address to be configured as a station in the virtual air, but that doesn't make sense as any station could have multiple MAC addresses, and even have randomized ones in scanning, etc. Add some code here to tell wmediumd of used MAC addresses, binding them to the hardware address. Combined with a wmediumd patch that makes it track the addresses this allows configuring just the radio address (42:00:00:00:nn:00 unless the radio was manually created) in wmediumd as a station, and all addresses that the station uses are added/removed dynamically. Tested with random scan, which without this and the corresponding wmediumd change doesn't get anything through as the sender doesn't exist as far as wmediumd is concerned (it's random). Link: https://lore.kernel.org/r/20200323162358.b397b1a1acef.Ice0536e34e5d96c51f97c374ea8af9551347c7e8@changeidSigned-off-by:
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David S. Miller authored
Tonghao Zhang says: ==================== openvswitch: expand meter tables and fix bug The patch set expand or shrink the meter table when necessary. and other patches fix bug or improve codes. ==================== Signed-off-by:David S. Miller <davem@davemloft.net>
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Tonghao Zhang authored
When setting the meter rate to 4+Gbps, there is an overflow, the meters don't work as expected. Cc: Pravin B Shelar <pshelar@ovn.org> Cc: Andy Zhou <azhou@ovn.org> 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
Cc: Pravin B Shelar <pshelar@ovn.org> Cc: Andy Zhou <azhou@ovn.org> Signed-off-by:
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Tonghao Zhang authored
Before invoking the ovs_meter_cmd_reply_stats, "meter" was checked, so don't check it agin in that function. Cc: Pravin B Shelar <pshelar@ovn.org> Cc: Andy Zhou <azhou@ovn.org> Signed-off-by:
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Tonghao Zhang authored
Don't allow user to create meter unlimitedly, which may cause to consume a large amount of kernel memory. The max number supported is decided by physical memory and 20K meters as default. Cc: Pravin B Shelar <pshelar@ovn.org> Cc: Andy Zhou <azhou@ovn.org> Signed-off-by:
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Tonghao Zhang authored
In kernel datapath of Open vSwitch, there are only 1024 buckets of meter in one datapath. If installing more than 1024 (e.g. 8192) meters, it may lead to the performance drop. But in some case, for example, Open vSwitch used as edge gateway, there should be 20K at least, where meters used for IP address bandwidth limitation. [Open vSwitch userspace datapath has this issue too.] For more scalable meter, this patch use meter array instead of hash tables, and expand/shrink the array when necessary. So we can install more meters than before in the datapath. Introducing the struct *dp_meter_instance, it's easy to expand meter though changing the *ti point in the struct *dp_meter_table. Cc: Pravin B Shelar <pshelar@ovn.org> Cc: Andy Zhou <azhou@ovn.org> Signed-off-by:
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- 23 Apr, 2020 18 commits
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Colin Ian King authored
Currently the unsigned variable tmp is being checked for an negative error return from the call to bcm_phy_read_rdb and this can never be true since tmp is unsigned. Fix this by making tmp a plain int. Addresses-Coverity: ("Unsigned compared against 0") Fixes: 4406d36d ("net: phy: bcm54140: add hwmon support") Signed-off-by:Colin Ian King <colin.king@canonical.com> Reviewed-by:
Andrew Lunn <andrew@lunn.ch> Reviewed-by:
Michael Walle <michael@walle.cc> Signed-off-by:
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Zou Wei authored
Fix the following sparse warning: drivers/net/ethernet/qlogic/qed/qed_ll2.c:2334:20: warning: symbol 'll2_cbs' was not declared. Should it be static? Reported-by:
Hulk Robot <hulkci@huawei.com> Signed-off-by:
Zou Wei <zou_wei@huawei.com> Acked-by: Michal Kalderon <michal.kalderon@marvell.com> Signed-off-by:
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Xu Wang authored
Remove unnecassary casts in the argument to kfree. Signed-off-by:
Xu Wang <vulab@iscas.ac.cn> Signed-off-by:
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David S. Miller authored
Grygorii Strashko says: ==================== net: ethernet: ti: cpts: add irq and HW_TS_PUSH events This is re-spin of patches to add CPSW IRQ and HW_TS_PUSH events support I've sent long time ago [1]. In this series, I've tried to restructure and split changes, and also add few additional optimizations comparing to initial RFC submission [1]. The HW_TS_PUSH events intended to serve for different timesync purposes on of which is to add PPS generation function, which can be implemented as below: +-----------------+ | Control | | application | +------->+ +----------+ | | | | | | | | | +-----------------+ | | | | | | PTP_EXTTS_REQUEST | | | | | +----------------------------------------------------------------+ | | Kernel +-------+----------+ +-------v--------+ | \dev\ptpX | | /sys/class/pwm/| | | | | +-------^----------+ +-------+--------+ | | | | | +-------v-------------------+ +-------+----------+ | | | CPTS driver | |pwm/pwm-omap-dmtimer.c | | | +---------------------------+ +-------^----------+ |clocksource/timer_ti_dm.c | | +-------+-------------------+ |HWx_TS_PUSH evt | +----------------------------------------------------------------+ | | HW +-------+----------+ +-------v--------+ | CPTS | | DMTimer | | | | | | HWx_TS_PUSH X<-----------------+ | | + | | +------------------+ +-------+--------+ | X timer4 As per my knowledge there is at least one public implemented above PPS generation schema from Tusori Tibor [2] based on initial HW_TS_PUSH enable submission[1]. And now there is work done by Lokesh Vutla <lokeshvutla@ti.com> published to enable PWM enable/improve PWM adjustment from user space [3][4][5]. Main changes comparing to initial submission: - TX timestamp processing deferred to ptp worker only - both CPTS IRQ and polling events processing supported to make it work for Keystone 2 also - switch to use new .gettimex64() interface - no DT updates as number of HWx_TS_PUSH inputs is static per HW Testing on am571x-idk/omap2plus_defconfig/+CONFIG_PREEMPT=y: 1) testing HW_TS_PUSH - enable pwm in DT pwm16: dmtimer-pwm { compatible = "ti,omap-dmtimer-pwm"; ti,timers = <&timer16>; #pwm-cells = <3>; }; - configure and start pwm echo 0 > /sys/class/pwm/pwmchip0/export echo 1000000000 > /sys/class/pwm/pwmchip0/pwm0/period echo 500000000 > /sys/class/pwm/pwmchip0/pwm0/duty_cycle echo 1 > /sys/class/pwm/pwmchip0/pwm0/enable - test HWx_TS_PUSH using Kernel selftest testptp application ./tools/testing/selftests/ptp/testptp -d /dev/ptp0 -e 1000 -i 3 2) testing phc2sys phc2sys[1616.791]: eth0 rms 408190379792180864 max 1580914543017209856 freq +864 +/- 4635 delay 645 +/- 29 phc2sys[1646.795]: eth0 rms 41 max 108 freq +0 +/- 36 delay 656 +/- 29 phc2sys[1676.800]: eth0 rms 43 max 83 freq +2 +/- 38 delay 650 +/- 0 phc2sys[1706.804]: eth0 rms 39 max 87 freq +4 +/- 34 delay 672 +/- 55 phc2sys[1736.808]: eth0 rms 35 max 66 freq +1 +/- 30 delay 667 +/- 49 phc2sys[1766.813]: eth0 rms 38 max 79 freq +2 +/- 33 delay 656 +/- 29 phc2sys[1796.817]: eth0 rms 45 max 98 freq +1 +/- 39 delay 656 +/- 29 phc2sys[1826.821]: eth0 rms 40 max 87 freq +5 +/- 35 delay 650 +/- 0 phc2sys[1856.826]: eth0 rms 29 max 76 freq -0 +/- 25 delay 656 +/- 29 phc2sys[1886.830]: eth0 rms 40 max 97 freq +4 +/- 35 delay 667 +/- 49 phc2sys[1916.834]: eth0 rms 42 max 94 freq +2 +/- 36 delay 661 +/- 41 phc2sys[1946.839]: eth0 rms 40 max 91 freq +2 +/- 35 delay 661 +/- 41 phc2sys[1976.843]: eth0 rms 46 max 88 freq -0 +/- 40 delay 667 +/- 49 phc2sys[2006.847]: eth0 rms 49 max 97 freq +2 +/- 43 delay 650 +/- 0 3) testing ptp4l - 1G connection ptp4l[862.891]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED ptp4l[923.894]: rms 1019697354682 max 5768279314068 freq +26053 +/- 72 delay 488 +/- 1 ptp4l[987.896]: rms 13 max 26 freq +26005 +/- 29 delay 488 +/- 1 ptp4l[1051.899]: rms 14 max 50 freq +25895 +/- 21 delay 488 +/- 1 ptp4l[1115.901]: rms 11 max 27 freq +25878 +/- 17 delay 488 +/- 1 ptp4l[1179.904]: rms 10 max 27 freq +25857 +/- 12 delay 488 +/- 1 ptp4l[1243.906]: rms 14 max 37 freq +25851 +/- 15 delay 488 +/- 1 ptp4l[1307.909]: rms 12 max 33 freq +25835 +/- 15 delay 488 +/- 1 ptp4l[1371.911]: rms 11 max 27 freq +25832 +/- 14 delay 488 +/- 1 ptp4l[1435.914]: rms 11 max 26 freq +25823 +/- 11 delay 488 +/- 1 ptp4l[1499.916]: rms 10 max 29 freq +25829 +/- 11 delay 489 +/- 1 ptp4l[1563.919]: rms 11 max 27 freq +25827 +/- 12 delay 488 +/- 1 - 10M connection ptp4l[51.955]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED ptp4l[112.957]: rms 279468848453933920 max 1580914542977391360 freq +25390 +/- 3207 delay 8222 +/- 36 ptp4l[176.960]: rms 254 max 522 freq +25809 +/- 219 delay 8271 +/- 30 ptp4l[240.962]: rms 271 max 684 freq +25868 +/- 234 delay 8249 +/- 22 ptp4l[304.965]: rms 263 max 556 freq +25894 +/- 227 delay 8225 +/- 47 ptp4l[368.967]: rms 238 max 648 freq +25908 +/- 204 delay 8234 +/- 40 ptp4l[432.970]: rms 274 max 658 freq +25932 +/- 237 delay 8241 +/- 22 ptp4l[496.972]: rms 247 max 557 freq +25943 +/- 213 delay 8223 +/- 26 ptp4l[560.974]: rms 291 max 756 freq +25968 +/- 251 delay 8244 +/- 41 ptp4l[624.977]: rms 249 max 697 freq +25975 +/- 216 delay 8258 +/- 22 Changes in v5: - fixed build issue Changes in v4: - fixed comments from Richard Cochran - dropped patch "net: ethernet: ti: cpts: move rx timestamp processing to ptp worker only" - added "Acked-by" from Richard Cochran <richardcochran@gmail.com> - dependencies resolved, patch merged Changes in v3: - fixed rebase mess - fixed build issues Changes in v2 (broken): - fixed (formatting) comments from David Miller <davem@davemloft.net> v4: https://patchwork.ozlabs.org/project/netdev/cover/20200422201254.15232-1-grygorii.strashko@ti.com/ v3: https://patchwork.ozlabs.org/project/netdev/cover/20200320194244.4703-1-grygorii.strashko@ti.com/ v2: https://patchwork.ozlabs.org/cover/1258339/ v1: https://patchwork.ozlabs.org/cover/1254708/ [1] https://lore.kernel.org/patchwork/cover/799251/ [2] https://usermanual.wiki/Document/SetupGuide.632280828.pdf https://github.com/t-tibor/msc_thesis [3] https://patchwork.kernel.org/cover/11421329/ [4] https://patchwork.kernel.org/cover/11433197/ [5] https://sourceforge.net/p/linuxptp/mailman/message/36943248/ ==================== Signed-off-by: -
Grygorii Strashko authored
The CPSW misc IRQ need be enabled for CPTS event_pend IRQs processing. This patch adds corresponding support to CPSW driver. Signed-off-by:
Grygorii Strashko <grygorii.strashko@ti.com> Acked-by:
Richard Cochran <richardcochran@gmail.com> Signed-off-by:
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Grygorii Strashko authored
Hence CPTS IRQ support is in place the W_TS_PUSH events can be added. PWM capable DmTimers can be used to generete input signals for CPTS on TI AM335x/AM437x/DRA7 SoCs to be timestamped: AM335x/AM437x: timer4 - timer7 DRA7/AM57xx: timer13 - timer16 Signed-off-by:
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Grygorii Strashko authored
Add CPTS IRQ support, but do not enable it. By default, the CPTS driver will continue working using polling mode which is required for CPTS to continue working on platforms other than CPSW, like Keystone 2. The CPTS IRQ support is required to enable support for HW_TS_PUSH events. The CPSW CPTS IRQ and HW_TS_PUSH events support will be enabled in follow up patches. Signed-off-by:
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Grygorii Strashko authored
Now spinlock is used to synchronize everything which is not required. Add mutex and use to sync access to PTP interface and PTP worker and use spinlock only to sync FIFO/events processing. Signed-off-by:
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Grygorii Strashko authored
Now the tx timestamp processing happens from different contexts - softirq and thread/PTP worker. Enabling IRQ will add one more hard_irq context. This makes over all defered TX timestamp processing and locking overcomplicated. Move tx timestamp processing to PTP worker always instead. napi_rx->cpts_tx_timestamp if ptp_packet then push to txq ptp_schedule_worker() do_aux_work->cpts_overflow_check cpts_process_events() Signed-off-by: -
Grygorii Strashko authored
Now the CPTS driver performs packet (skb) parsing every time when it needs to match packet to CPTS event (including ptp_classify_raw() calls). This patch optimizes matching process by parsing packet only once upon arrival and stores PTP specific data in skb->cb using the same fromat as in CPTS HW event. As result, all future matching reduces to comparing two u32 values. Signed-off-by:
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Grygorii Strashko authored
The CPTS HW latches and saves CPTS counter value in CPTS fifo immediately after writing to CPSW_CPTS_PUSH.TS_PUSH (bit 0), so the total time that the driver needs to read the CPTS timestamp is the time required CPSW_CPTS_PUSH write to actually reach HW. Hence switch CPTS driver to implement new .gettimex64() callback for more precise measurement of the offset between a PHC and the system clock which is measured as time between write(CPSW_CPTS_PUSH) read(CPSW_CPTS_PUSH) Signed-off-by:
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Grygorii Strashko authored
Now CPTS driver .adjfreq() generates request to read CPTS current time (CPTS_EV_PUSH) with intention to process all pending event using previous frequency adjustment values before switching to the new ones. So CPTS_EV_PUSH works as a marker to switch to the new frequency adjustment values. Current code assumes that all job is done in .adjfreq(), but after enabling IRQ this will not be true any more. Hence save new frequency adjustment values (mult) and perform actual freq adjustment in cpts_fifo_read() immediately after CPTS_EV_PUSH is received. Signed-off-by:
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Grygorii Strashko authored
Now CPTS HW time reading code is implemented in timecounter->cyclecounter .read() callback and performs following operations: timecounter_read() ->cc.read() -> cpts_systim_read() - request current CPTS HW time CPTS_TS_PUSH.TS_PUSH = 1 - poll CPTS FIFO for CPTS_EV_PUSH event with current HW timestamp This approach need to be changed for the future switch to PTP PHC .gettimex64() callback, which require to separate requesting current CPTS HW time and processing CPTS FIFO. And for the follow up patch, which improves .adjfreq() implementation. This patch moves code accessing CPTS HW out of timecounter code as following: - convert HW timestamp of every CPTS event to PTP time (us) and store it as part struct cpts_event; - add CPTS context field to store current CPTS HW time (counter) value and update it on CPTS_EV_PUSH reception; - move code accessing CPTS HW out of timecounter code and use current CPTS HW time (counter) from CPTS context instead; - ensure timecounter->cycle_last is updated on CPTS_EV_PUSH reception. After this change CPTS timecounter will only perform timekeeper role without actually accessing CPTS HW. Signed-off-by:
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Grygorii Strashko authored
Use dev_yy() API instead of pr_yy() for log outputs. Signed-off-by:
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David S. Miller authored
Eric Dumazet says: ==================== net: napi: addition of napi_defer_hard_irqs This patch series augments gro_glush_timeout feature with napi_defer_hard_irqs As extensively described in first patch changelog, this can suppresss the chit-chat traffic between NIC and host to signal interrupts and re-arming them, since this can be an issue on high speed NIC with many queues. The last patch in this series converts mlx4 TX completion to napi_complete_done(), to enable this new mechanism. ==================== Signed-off-by: -
Eric Dumazet authored
In order to benefit from the new napi_defer_hard_irqs feature, we need to use napi_complete_done() variant in this driver. RX path is already using it, this patch implements TX completion side. mlx4_en_process_tx_cq() now returns the amount of retired packets, instead of a boolean, so that mlx4_en_poll_tx_cq() can pass this value to napi_complete_done(). Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Eric Dumazet authored
gro_flush_timeout and napi_defer_hard_irqs can be read from napi_complete_done() while other cpus write the value, whithout explicit synchronization. Use READ_ONCE()/WRITE_ONCE() to annotate the races. Signed-off-by:
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Eric Dumazet authored
Back in commit 3b47d303 ("net: gro: add a per device gro flush timer") we added the ability to arm one high resolution timer, that we used to keep not-complete packets in GRO engine a bit longer, hoping that further frames might be added to them. Since then, we added the napi_complete_done() interface, and commit 364b6055 ("net: busy-poll: return busypolling status to drivers") allowed drivers to avoid re-arming NIC interrupts if we made a promise that their NAPI poll() handler would be called in the near future. This infrastructure can be leveraged, thanks to a new device parameter, which allows to arm the napi hrtimer, instead of re-arming the device hard IRQ. We have noticed that on some servers with 32 RX queues or more, the chit-chat between the NIC and the host caused by IRQ delivery and re-arming could hurt throughput by ~20% on 100Gbit NIC. In contrast, hrtimers are using local (percpu) resources and might have lower cost. The new tunable, named napi_defer_hard_irqs, is placed in the same hierarchy than gro_flush_timeout (/sys/class/net/ethX/) By default, both gro_flush_timeout and napi_defer_hard_irqs are zero. This patch does not change the prior behavior of gro_flush_timeout if used alone : NIC hard irqs should be rearmed as before. One concrete usage can be : echo 20000 >/sys/class/net/eth1/gro_flush_timeout echo 10 >/sys/class/net/eth1/napi_defer_hard_irqs If at least one packet is retired, then we will reset napi counter to 10 (napi_defer_hard_irqs), ensuring at least 10 periodic scans of the queue. On busy queues, this should avoid NIC hard IRQ, while before this patch IRQ avoidance was only possible if napi->poll() was exhausting its budget and not call napi_complete_done(). This feature also can be used to work around some non-optimal NIC irq coalescing strategies. Having the ability to insert XX usec delays between each napi->poll() can increase cache efficiency, since we increase batch sizes. It also keeps serving cpus not idle too long, reducing tail latencies. Co-developed-by:
Luigi Rizzo <lrizzo@google.com> Signed-off-by:
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