Robin Murphy ad78dee0b6 dma-debug: Batch dma_debug_entry allocation ... DMA debug entries are one of those things which aren't that useful individually - we will always want some larger quantity of them - and which we don't really need to manage the exact number of - we only care about having 'enough'. In that regard, the current behaviour of creating them one-by-one leads to a lot of unwarranted function call overhead and memory wasted on alignment padding. Now that we don't have to worry about freeing anything via dma_debug_resize_entries(), we can optimise the allocation behaviour by grabbing whole pages at once, which will save considerably on the aforementioned overheads, and probably offer a little more cache/TLB locality benefit for traversing the lists under normal operation. This should also give even less reason for an architecture-level override of the preallocation size, so make the definition unconditional - if there is still any desire to change the compile-time value for some platforms it would be better off as a Kconfig option anyway. Since freeing a whole page of entries at once becomes enough of a challenge that it's not really worth complicating dma_debug_init(), we may as well tweak the preallocation behaviour such that as long as we manage to allocate *some* pages, we can leave debugging enabled on a best-effort basis rather than otherwise wasting them. Signed-off-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Qian Cai <cai@lca.pw> Signed-off-by: Christoph Hellwig <hch@lst.de>		2018-12-11 14:32:13 +01:00
..
ABI	LED fixes for 4.20-rc2	2018-11-08 17:49:04 -06:00
accelerators
accounting	psi: cgroup support	2018-10-26 16:26:32 -07:00
acpi	ACPI: property: graph: Update graph documentation to use generic references	2018-07-23 12:44:52 +02:00
admin-guide	Char/Misc driver fixes for 4.20-rc4	2018-11-22 08:43:06 -08:00
aoe
arm	ARM: SoC device tree updates for 4.20	2018-10-29 15:05:20 -07:00
arm64	Documentation/arm64: HugeTLB page implementation	2018-10-10 18:08:36 +01:00
auxdisplay
backlight
block	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
blockdev	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
bpf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2018-08-07 11:02:05 -07:00
bus-devices
cdrom	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
cgroup-v1	Merge branch 'for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2018-10-25 17:15:46 -07:00
cma
connector
console	Documentation: corrections to console/console.txt	2018-08-10 16:09:40 -06:00
core-api	XArray: Fix Documentation	2018-11-05 16:38:10 -05:00
cpu-freq	Documentation: cpu-freq: Frequencies aren't always sorted	2018-11-07 13:29:04 +01:00
cpuidle
crypto	KEYS: Implement PKCS#8 RSA Private Key parser [ver #2]	2018-10-26 09:30:46 +01:00
dev-tools	docs: dev-tools: coccinelle: Update documentation	2018-08-31 16:51:59 -06:00
device-mapper	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
devicetree	dt-bindings: dsa: Fix typo in "probed"	2018-11-23 22:33:55 -08:00
doc-guide	Documentation/sphinx: allow "functions" with no parameters	2018-06-30 07:52:42 -06:00
driver-api	Char/Misc driver patches for 4.20-rc1	2018-10-26 09:11:43 -07:00
driver-model	dmaengine: add a new helper dmaenginem_async_device_register	2018-07-30 10:50:22 +05:30
early-userspace	initramfs: move gen_initramfs_list.sh from scripts/ to usr/	2018-08-22 23:21:44 +09:00
EDID
extcon
fault-injection
fb	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
features	arch: switch the default on ARCH_HAS_SG_CHAIN	2018-12-06 07:04:56 -08:00
filesystems	This pull request contains updates for UBIFS:	2018-11-04 14:46:04 -08:00
firmware_class
fmc	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
fpga	docs: fpga: add a document for FPGA Device Feature List (DFL) Framework Overview	2018-07-15 13:55:44 +02:00
gpio	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
gpu	Merge branch 'drm-next-4.20' of git://people.freedesktop.org/~agd5f/linux into drm-next	2018-09-21 09:52:53 +10:00
hid
hwmon	hwmon: (ina3221) Read channel input source info from DT	2018-10-10 20:37:13 -07:00
i2c	i2c: add i2c bus driver for NVIDIA GPU	2018-11-09 17:46:43 +01:00
ia64
ide	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
iio
infiniband
input	Revert "Input: Add the REL_WHEEL_HI_RES event code"	2018-11-22 08:57:44 +01:00
ioctl	drm pull for 4.20-rc1	2018-10-28 17:49:53 -07:00
isdn	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
kbuild	kbuild: remove unused cc-fullversion variable	2018-11-02 00:15:26 +09:00
kdump
kernel-hacking	doc:it_IT: translation for kernel-hacking	2018-07-26 16:21:09 -06:00
laptops	platform-drivers-x86 for v4.20-1	2018-11-01 08:42:21 -07:00
leds	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
lightnvm
livepatch
locking	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
m68k	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
maintainer	docs: Fix more broken references	2018-06-15 18:11:26 -03:00
md
media	media: docs: Document metadata format in struct v4l2_format	2018-11-06 07:10:12 -05:00
memory-devices
mic
mips	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
misc-devices	pci_endpoint_test: Add 2 ioctl commands	2018-07-19 11:46:57 +01:00
mmc	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
mtd	Documentation: mtd: remove stale pxa3xx NAND controller documentation	2018-09-04 23:37:38 +02:00
namespaces
netlabel	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
networking	rxrpc: Fix life check	2018-11-15 11:35:40 -08:00
nfc
nios2
nvdimm
nvmem	Documentation: nvmem: document cell tables and lookup entries	2018-09-28 15:14:54 +02:00
openrisc
parisc	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
PCI	pci-v4.20-changes	2018-10-25 06:50:48 -07:00
pcmcia	pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function	2018-08-18 12:30:42 -07:00
perf
phy
platform
power	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
powerpc	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
pps
process	The Compiler Attributes series	2018-11-01 18:34:46 -07:00
pti
ptp
rapidio
RCU	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
riscv
s390	KVM updates for v4.20	2018-10-25 17:57:35 -07:00
scheduler	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
scsi	SCSI misc on 20181024	2018-10-25 07:40:30 -07:00
security	Merge branch 'next-keys2' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2018-11-01 15:23:59 -07:00
serial	TTY/Serial patches for 4.20-rc1	2018-10-29 10:42:20 -07:00
sh
sound	ALSA: doc: Brush up the old writing-an-alsa-driver	2018-10-18 10:30:01 +02:00
sparc
sphinx	Documentation/sphinx: allow "functions" with no parameters	2018-06-30 07:52:42 -06:00
sphinx-static	docs: improve readability for people with poorer eyesight	2018-10-07 09:16:50 -06:00
spi	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
sysctl	New gcc plugin: stackleak	2018-11-01 11:46:27 -07:00
target
thermal
timers	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
trace	The biggest change here is the updates to kprobes	2018-10-30 09:49:56 -07:00
translations	This was a moderately busy cycle for docs, with the usual collection of	2018-08-14 14:29:31 -07:00
usb	USB-serial updates for v4.19-rc1	2018-07-20 21:47:15 +02:00
userspace-api
virtual	KVM updates for v4.20	2018-10-25 17:57:35 -07:00
vm	slub: extend slub debug to handle multiple slabs	2018-10-26 16:25:19 -07:00
w1	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
watchdog	documentation: watchdog: add documentation for armada-37xx-wdt	2018-10-13 15:19:40 +02:00
wimax
x86	x86/dma/amd-gart: Stop resizing dma_debug_entry pool	2018-12-11 14:32:12 +01:00
xilinx	Documentation: xilinx: Add documentation for eemi APIs	2018-10-09 13:26:05 +02:00
xtensa
.gitignore
atomic_bitops.txt
atomic_t.txt
bt8xxgpio.txt
btmrvl.txt
bus-virt-phys-mapping.txt
Changes
clearing-warn-once.txt
CodingStyle
conf.py	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
cpu-load.txt
cputopology.txt
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
digsig.txt
DMA-API-HOWTO.txt
DMA-API.txt	dma-debug: Batch dma_debug_entry allocation	2018-12-11 14:32:13 +01:00
DMA-attributes.txt
DMA-ISA-LPC.txt
docutils.conf
dontdiff
efi-stub.txt	efi_stub: update documentation on dtb= parameter	2018-09-09 14:46:44 -06:00
eisa.txt
flexible-arrays.txt
futex-requeue-pi.txt
gcc-plugins.txt
highuid.txt
hw_random.txt
hwspinlock.txt
index.rst	docs: tidy up TOCs and refs to license-rules.rst	2018-08-31 16:50:50 -06:00
intel_txt.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt	block: Track DISCARD statistics and output them in stat and diskstat	2018-07-18 08:44:22 -06:00
IPMI.txt
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
irqflags-tracing.txt
isa.txt
isapnp.txt
kernel-per-CPU-kthreads.txt	doc: Update removal of RCU-bh/sched update machinery	2018-08-30 10:59:48 -07:00
kobject.txt
kprobes.txt	kprobes/Documentation: Fix various typos	2018-06-22 11:10:55 +02:00
kref.txt
ldm.txt
lockup-watchdogs.txt
logo.gif
logo.txt
lsm.txt
lzo.txt
mailbox.txt
Makefile
memory-barriers.txt	locking/memory-barriers: Replace smp_cond_acquire() with smp_cond_load_acquire()	2018-10-02 10:28:05 +02:00
men-chameleon-bus.txt
nommu-mmap.txt	Documentation: nommu-map: Fix duplicate word typo	2018-06-26 09:01:27 -06:00
ntb.txt
numastat.txt
padata.txt
parport-lowlevel.txt
percpu-rw-semaphore.txt
phy.txt
pi-futex.txt
pnp.txt
preempt-locking.txt	Documentation: preempt-locking: Use better example	2018-10-12 11:35:47 -06:00
pwm.txt
rbtree.txt
remoteproc.txt
rfkill.txt	rfkill: Fix several typos in documentation	2018-06-15 13:36:08 +02:00
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt
rtc.txt
SAK.txt
sgi-ioc4.txt
siphash.txt
SM501.txt
smsc_ece1099.txt
speculation.txt
static-keys.txt
SubmittingPatches
svga.txt
switchtec.txt	NTB: switchtec_ntb: Update switchtec documentation with prerequisites for NTB	2018-10-11 11:28:53 -05:00
sync_file.txt
tee.txt
this_cpu_ops.txt
unaligned-memory-access.txt
vfio-mediated-device.txt
vfio.txt
video-output.txt
xillybus.txt
xz.txt
zorro.txt