Eric Dumazet
3e59020abf
net: bql: add __netdev_tx_sent_queue() ...
When qdisc_run() tries to use BQL budget to bulk-dequeue a batch
of packets, GSO can later transform this list in another list
of skbs, and each skb is sent to device ndo_start_xmit(),
one at a time, with skb->xmit_more being set to one but
for last skb.
Problem is that very often, BQL limit is hit in the middle of
the packet train, forcing dev_hard_start_xmit() to stop the
bulk send and requeue the end of the list.
BQL role is to avoid head of line blocking, making sure
a qdisc can deliver high priority packets before low priority ones.
But there is no way requeued packets can be bypassed by fresh
packets in the qdisc.
Aborting the bulk send increases TX softirqs, and hot cache
lines (after skb_segment()) are wasted.
Note that for TSO packets, we never split a packet in the middle
because of BQL limit being hit.
Drivers should be able to update BQL counters without
flipping/caring about BQL status, if the current skb
has xmit_more set.
Upper layers are ultimately responsible to stop sending another
packet train when BQL limit is hit.
Code template in a driver might look like the following :
send_doorbell = __netdev_tx_sent_queue(tx_queue, nr_bytes, skb->xmit_more);
Note that __netdev_tx_sent_queue() use is not mandatory,
since following patch will change dev_hard_start_xmit()
to not care about BQL status.
But it is highly recommended so that xmit_more full benefits
can be reached (less doorbells sent, and less atomic operations as well)
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-11-03 15:40:01 -07:00
mmc: mmci: Drop support for pdata GPIO numbers
2018-10-08 11:40:43 +02:00
i40e: Update status codes
2018-10-31 10:57:43 -07:00
libceph: support the RADOS copy-from operation
2018-10-22 10:28:23 +02:00
Merge branch 'clk-ti' into clk-next
2018-10-18 15:41:21 -07:00
arm64: zynqmp: SoC CLK changes for v4.20
2018-10-10 13:47:06 +02:00
fpga: add devm_fpga_region_create
2018-10-16 11:13:50 +02:00
IOMMU Updates for Linux v4.20
2018-10-26 10:50:10 -07:00
This is the bulk of GPIO changes for the v4.20 series:
2018-10-23 08:45:05 +01:00
KVM updates for v4.20
2018-10-25 17:57:35 -07:00
chrome-platform for v4.20
2018-10-31 16:47:55 -07:00
First merge window pull request
2018-10-26 07:38:19 -07:00
mmc: core: add helper to see if a host is doing a retune
2018-10-08 11:40:43 +02:00
SPI NOR changes:
2018-10-23 01:09:22 +01:00
netfilter: nft_osf: Add ttl option support
2018-10-16 10:01:48 +02:00
arm64: perf: Reject stand-alone CHAIN events for PMUv3
2018-10-12 15:25:17 +01:00
USB/PHY patches for 4.20-rc1
2018-10-26 08:14:13 -07:00
platform-drivers-x86 for v4.20-1
2018-11-01 08:42:21 -07:00
First merge window pull request
2018-10-26 07:38:19 -07:00
More power management updates for 4.20-rc1
2018-10-30 09:08:07 -07:00
Qualcomm ARM Based Driver Updates for v4.20
2018-10-02 10:11:12 +02:00
Merge remote-tracking branch 'spi/topic/of' into spi-next
2018-10-21 17:00:17 +01:00
Olga added support for the NFSv4.2 asynchronous copy protocol. We
2018-10-30 13:03:29 -07:00
USB/PHY patches for 4.20-rc1
2018-10-26 08:14:13 -07:00
pci-v4.20-changes
2018-10-25 06:50:48 -07:00
ACPI/ADXL: Add address translation interface using an ACPI DSM
2018-10-16 10:03:00 +02:00
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
blkcg: reassociate bios when make_request() is called recursively
2018-10-20 15:39:55 -06:00
linux/bitmap.h: relax comment on compile-time constant nbits
2018-10-31 08:54:12 -07:00
bitops: protect variables in bit_clear_unless() macro
2018-10-15 15:43:06 +02:00
blkcg: fix edge case for blk_get_rl() under memory pressure
2018-10-20 15:39:54 -06:00
blk-mq: provide helper for setting up an SQ queue and tag set
2018-10-15 20:05:18 -06:00
block: add a report_zones method
2018-10-25 11:17:40 -06:00
block: Introduce blk_revalidate_disk_zones()
2018-10-25 11:17:40 -06:00
bpf: add queue and stack maps
2018-10-19 13:24:31 -07:00
bpf: add queue and stack maps
2018-10-19 13:24:31 -07:00
bpf: fix partial copy of map_ptr when dst is scalar
2018-10-31 16:53:17 -07:00
ext4: convert fault handler to use vm_fault_t type
2018-10-02 22:20:50 -04:00
psi: cgroup support
2018-10-26 16:26:32 -07:00
psi: cgroup support
2018-10-26 16:26:32 -07:00
clk: clk: Add clk_gate_restore_context function
2018-10-03 15:29:15 +03:00
Merge branches 'clk-tegra' and 'clk-bulk-get-all' into clk-next
2018-10-18 15:43:38 -07:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-10-25 11:14:36 -07:00
include/linux/compat.h: mark expected switch fall-throughs
2018-10-31 08:54:13 -07:00
s390 updates for the 4.20 merge window
2018-10-23 11:14:47 +01:00
Globally warn on VLA use
2018-10-28 13:26:45 -07:00
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2018-10-25 16:43:35 -07:00
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
cpuidle: menu: Fix wakeup statistics updates for polling state
2018-10-04 10:23:37 +02:00
kdump, proc/vmcore: Enable kdumping encrypted memory with SME enabled
2018-10-06 12:09:26 +02:00
macintosh: Use common code to access RTC
2018-10-08 22:53:10 +11:00
locking/lockdep: Make global debug_locks* variables read-mostly
2018-10-19 07:53:18 +02:00
delayacct: track delays from thrashing cache pages
2018-10-26 16:26:32 -07:00
PM / devfreq: Make update_devfreq() public
2018-10-02 10:16:41 +09:00
- Biggest change this cycle is to remove support for the legacy IO path
2018-10-26 12:57:38 -07:00
Driver core patches for 4.20-rc1
2018-10-26 08:42:25 -07:00
dma-debug: Check for drivers mapping invalid addresses in dma_map_single()
2018-10-08 09:44:17 +02:00
swiotlb: remove the overflow buffer
2018-10-19 08:43:46 +02:00
dma-mapping: translate __GFP_NOFAIL to DMA_ATTR_NO_WARN
2018-10-09 15:08:26 +02:00
dns: Allow the dns resolver to retrieve a server set
2018-10-04 09:40:52 -07:00
f2fs: guarantee journalled quota data by checkpoint
2018-10-22 17:54:47 -07:00
fanotify: support reporting thread id instead of process id
2018-10-08 13:48:45 +02:00
bpf: add bpf_jit_limit knob to restrict unpriv allocations
2018-10-25 17:11:42 -07:00
\n
2018-10-29 09:19:53 -07:00
fsnotify: generalize handling of extra event flags
2018-10-04 13:28:02 +02:00
Merge branch 'for-4.20/logitech-highres' into for-linus
2018-10-23 13:35:22 +02:00
mm/hmm: use a structure for update callback parameters
2018-10-31 08:54:12 -07:00
mm/gup: cache dev_pagemap while pinning pages
2018-10-26 16:38:15 -07:00
mm: migration: fix migration of huge PMD shared pages
2018-10-05 16:32:04 -07:00
hwrng: core - document the quality field
2018-10-05 10:16:56 +08:00
hwmon: (core) Add hwmon_in_enable attribute
2018-10-10 20:37:13 -07:00
ida: Convert to XArray
2018-10-21 10:46:33 -04:00
mac80211: minstrel: Enable STBC and LDPC for VHT Rates
2018-10-11 16:01:00 +02:00
ipv4/igmp: fix v1/v2 switchback timeout based on rfc3376, 8.12
2018-10-29 20:26:06 -07:00
LSM: Convert from initcall to struct lsm_info
2018-10-10 20:40:21 -07:00
genirq: Fix grammar s/an /a /
2018-10-09 07:50:41 +02:00
fs/iomap.c: change return type to vm_fault_t
2018-10-26 16:25:18 -07:00
Merge branches 'arm/renesas', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd' and 'core' into next
2018-10-10 18:09:37 +02:00
irqchip/irq-mvebu-sei: Add new driver for Marvell SEI
2018-10-02 12:00:08 +01:00
leds: core: Introduce LED pattern trigger
2018-10-11 21:55:58 +02:00
lightnvm: pblk: fix mapping issue on failed writes
2018-10-09 08:25:07 -06:00
include/linux/linkage.h: align weak symbols
2018-10-26 16:25:18 -07:00
net: phy: Replace phy driver features u32 with link_mode bitmap
2018-10-01 22:55:36 -07:00
list: introduce list_bulk_move_tail helper
2018-10-10 15:20:54 -05:00
locking/lockdep: Make class->ops a percpu counter and move it under CONFIG_DEBUG_LOCKDEP=y
2018-10-09 09:56:33 +02:00
Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2018-10-24 11:49:35 +01:00
mm: don't miss the last page because of round-off error
2018-10-26 16:25:19 -07:00
memblock: stop using implicit alignment to SMP_CACHE_BYTES
2018-10-31 08:54:16 -07:00
mm/memcontrol.c: convert mem_cgroup_id::ref to refcount_t type
2018-10-26 16:26:35 -07:00
mm/memory_hotplug: make add_memory() take the device_hotplug_lock
2018-10-31 08:54:17 -07:00
PCI/P2PDMA: Add PCI p2pmem DMA mappings to adjust the bus offset
2018-10-17 12:18:16 -05:00
net: phy: micrel: add Microchip KSZ9131 initial driver
2018-10-19 17:02:23 -07:00
net: phy: Add limkmode equivalents to some of the MII ethtool helpers
2018-10-01 22:55:36 -07:00
mm: remove CONFIG_HAVE_MEMBLOCK
2018-10-31 08:54:15 -07:00
Revert "mm, mmu_notifier: annotate mmu notifiers with blockable invalidate callbacks"
2018-10-26 16:25:19 -07:00
mm: remove CONFIG_NO_BOOTMEM
2018-10-31 08:54:14 -07:00
Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2018-10-24 11:49:35 +01:00
net: Plumb support for filtering ipv4 and ipv6 multicast route dumps
2018-10-16 00:13:39 -07:00
genirq/msi: Allow creation of a tree-based irqdomain for platform-msi
2018-10-02 11:16:38 +01:00
UAPI: ndctl: Remove use of PAGE_SIZE
2018-10-17 13:56:58 -07:00
net: bql: add __netdev_tx_sent_queue()
2018-11-03 15:40:01 -07:00
netlink: Add answer_flags to netlink_callback
2018-10-16 00:13:12 -07:00
netpoll: allow cleanup to be synchronous
2018-10-19 17:01:43 -07:00
TTY/Serial patches for 4.20-rc1
2018-10-29 10:42:20 -07:00
mm: create non-atomic version of SetPageReserved for init use
2018-10-26 16:26:34 -07:00
page cache: Convert find_get_entries_tag to XArray
2018-10-21 10:46:35 -04:00
pagevec: Use xa_mark_t
2018-10-21 10:46:39 -04:00
PCI: Remove pci_set_dma_max_seg_size()
2018-10-10 15:47:00 -05:00
PCI/P2PDMA: Introduce configfs/sysfs enable attribute helpers
2018-10-17 12:18:17 -05:00
pci-v4.20-changes
2018-10-25 06:50:48 -07:00
pci-v4.20-changes
2018-10-25 06:50:48 -07:00
percpu: remove PER_CPU_DEF_ATTRIBUTES macro
2018-10-31 08:54:14 -07:00
mm: dax: add comment for PFN_SPECIAL
2018-10-26 16:26:35 -07:00
net: phy: improve handling delayed work
2018-10-01 23:14:10 -07:00
PM / Domains: Document flags for genpd
2018-10-18 12:25:10 +02:00
macintosh: Use common code to access RTC
2018-10-08 22:53:10 +11:00
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
psi: cgroup support
2018-10-26 16:26:32 -07:00
psi: pressure stall information for CPU, memory, and IO
2018-10-26 16:26:32 -07:00
pstore/ram: Clarify resource reservation labels
2018-10-22 07:11:58 -07:00
Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2018-10-24 11:22:39 +01:00
spi: pxa2xx: Add devicetree support
2018-10-11 15:28:04 +01:00
firmware: qcom: scm: Add WLAN VMID for Qualcomm SCM interface
2018-10-13 20:31:37 +03:00
radix tree: Remove multiorder support
2018-10-21 10:46:48 -04:00
lib/rbtree.c: fix typo in comment of rb_insert_augmented()
2018-10-31 08:54:13 -07:00
Merge remote-tracking branches 'regmap/topic/noinc' and 'regmap/topic/single-rw' into regmap-next
2018-10-21 12:07:26 +01:00
remoteproc: Add mechanism for custom dump function assignment
2018-10-19 12:53:55 -07:00
reset: Grammar s/more then once/more than once/
2018-10-04 11:36:07 +02:00
memcg: remove memcg_kmem_skip_account
2018-10-26 16:26:33 -07:00
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
Revert "serial:serial_core: Allow use of CTS for PPS line discipline"
2018-10-04 09:57:45 -07:00
Revert "serial: sh-sci: Remove SCIx_RZ_SCIFA_REGTYPE"
2018-10-02 14:38:02 -07:00
include/linux/signal.h: mark expected switch fall-throughs
2018-10-31 08:54:14 -07:00
signal: Use a smaller struct siginfo in the kernel
2018-10-03 16:50:39 +02:00
net: skbuff.h: Mark expected switch fall-throughs
2018-10-17 22:31:30 -07:00
bpf: sk_msg program helper bpf_msg_push_data
2018-10-20 21:37:11 +02:00
mm, slab/slub: introduce kmalloc-reclaimable caches
2018-10-26 16:26:31 -07:00
smp,cpumask: introduce on_each_cpu_cond_mask
2018-10-09 16:51:11 +02:00
init: add arch_call_rest_init to allow stack switching
2018-10-09 11:20:55 +02:00
lib: Add memcat_p(): paste 2 pointer arrays together
2018-10-11 12:12:55 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2018-10-12 12:35:02 +02:00
Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax
2018-10-28 11:35:40 -07:00
swiotlb: don't dip into swiotlb pool for coherent allocations
2018-10-19 08:48:28 +02:00
TC: Set DMA masks for devices
2018-10-11 09:16:44 -07:00
tcp: do not change tcp_wstamp_ns in tcp_mstamp_refresh
2018-10-15 22:56:41 -07:00
thunderbolt: Convert rest of the driver files to use SPDX identifier
2018-10-02 15:52:08 -07:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-10-25 11:14:36 -07:00
trace_uprobe: support reference counter in fd-based uprobe
2018-10-10 22:14:17 -04:00
tracepoint: Fix tracepoint array element size mismatch
2018-10-17 15:35:29 -04:00
tracepoint: Fix tracepoint array element size mismatch
2018-10-17 15:35:29 -04:00
change semantics of ldisc ->compat_ioctl()
2018-10-13 00:50:53 -04:00
umh: Add command line to user mode helpers
2018-10-22 19:37:36 -07:00
net/packet: fix packet drop as of virtio gso
2018-10-04 22:23:15 -07:00
scsi: sched/wait: Add wait_event_lock_irq_timeout for TASK_UNINTERRUPTIBLE usage
2018-10-16 00:11:13 -04:00
xarray: Add range store functionality
2018-10-21 10:46:46 -04:00
