Adam Li 82810873ac net: make SK_MEMORY_PCPU_RESERV tunable ... [ Upstream commit 12a686c2e7 ] This patch adds /proc/sys/net/core/mem_pcpu_rsv sysctl file, to make SK_MEMORY_PCPU_RESERV tunable. Commit 3cd3399dd7 ("net: implement per-cpu reserves for memory_allocated") introduced per-cpu forward alloc cache: "Implement a per-cpu cache of +1/-1 MB, to reduce number of changes to sk->sk_prot->memory_allocated, which would otherwise be cause of false sharing." sk_prot->memory_allocated points to global atomic variable: atomic_long_t tcp_memory_allocated ____cacheline_aligned_in_smp; If increasing the per-cpu cache size from 1MB to e.g. 16MB, changes to sk->sk_prot->memory_allocated can be further reduced. Performance may be improved on system with many cores. Signed-off-by: Adam Li <adamli@os.amperecomputing.com> Reviewed-by: Christoph Lameter (Ampere) <cl@linux.com> Signed-off-by: David S. Miller <davem@davemloft.net> Stable-dep-of: 3584718cf2 ("net: fix sk_memory_allocated_{add|sub} vs softirqs") Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-05-02 16:29:24 +02:00
..
ABI	x86/rfds: Mitigate Register File Data Sampling (RFDS)	2024-03-15 10:48:21 -04:00
accounting	sched/psi: Allow unprivileged polling of N*2s period	2023-07-27 08:50:38 +02:00
admin-guide	net: make SK_MEMORY_PCPU_RESERV tunable	2024-05-02 16:29:24 +02:00
arc
arm	EFI updates for v6.1	2022-10-09 08:56:54 -07:00
arm64	arm64: Subscribe Microsoft Azure Cobalt 100 to ARM Neoverse N2 errata	2024-02-23 09:12:52 +01:00
block	blk-crypto: don't use struct request_queue for public interfaces	2023-05-11 23:03:00 +09:00
bpf	bpf, docs: Fix modulo zero, division by zero, overflow, and underflow	2023-03-10 09:33:50 +01:00
cdrom
core-api	overflow: Fix kern-doc markup for functions	2022-10-25 14:57:42 -07:00
cpu-freq
crypto
dev-tools	docs/scripts/gdb: add necessary make scripts_gdb step	2023-03-10 09:33:58 +01:00
devicetree	wifi: mwifiex: Support SD8978 chipset	2024-02-23 09:12:48 +01:00
doc-guide	Rust introduction for v6.1-rc1	2022-10-03 16:39:37 -07:00
driver-api	PCI/P2PDMA: Remove reference to pci_p2pdma_map_sg()	2024-01-25 15:27:44 -08:00
fault-injection	lkdtm: replace ll_rw_block with submit_bh	2023-07-19 16:21:53 +02:00
fb	Documentation: fb: udlfb: clean up text and formatting	2022-09-27 13:21:44 -06:00
features
filesystems	rename(): fix the locking of subdirectories	2024-01-31 16:17:02 -08:00
firmware_class
firmware-guide	Merge branches 'acpi-misc', 'acpi-tools' and 'acpi-docs'	2022-10-03 20:03:49 +02:00
fpga
gpu	drm/vmwgfx: Remove vmwgfx_hashtab	2023-01-18 11:58:28 +01:00
hid
hwmon	hwmon: (ftsteutates) Fix scaling of measurements	2023-03-10 09:33:10 +01:00
i2c	docs: i2c: slave-interface: return errno when handle I2C_SLAVE_WRITE_REQUESTED	2022-09-28 21:41:59 +02:00
ia64
iio	docs: iio: add documentation for BNO055 driver	2022-09-21 18:42:56 +01:00
images
infiniband
input	Merge branch 'next' into for-linus	2022-10-09 22:30:23 -07:00
isdn
kbuild	Documentation: kbuild: Add description of git for reproducible builds	2022-10-28 00:16:29 +09:00
kernel-hacking	Documentation: Fix spelling mistake in hacking.rst	2022-10-24 11:27:51 -06:00
leds
litmus-tests
livepatch
locking	Remove duplicate words inside documentation	2022-09-27 13:21:43 -06:00
loongarch	docs/LoongArch: Add booting description	2022-12-08 14:59:15 +08:00
m68k
maintainer
mhi
mips
misc-devices
mm	mm: multi-gen LRU: rename lrugen->lists[] to lrugen->folios[]	2023-09-19 12:27:54 +02:00
netlabel
networking	tcp: enforce receive buffer memory limits by allowing the tcp window to shrink	2023-10-19 23:08:54 +02:00
nios2
nvdimm
openrisc
parisc
PCI
pcmcia
peci
power
powerpc	powerpc/64s: update cpu selection options	2022-09-28 19:22:10 +10:00
process	docs: Set minimal gtags / GNU GLOBAL version to 6.6.5	2023-07-05 18:27:38 +01:00
RCU	There's not a huge amount of activity in the docs tree this time around,	2022-10-03 10:23:32 -07:00
riscv	riscv: Move early dtb mapping into the fixmap region	2023-05-01 08:26:28 +09:00
rust	x86: enable initial Rust support	2022-09-28 09:02:45 +02:00
s390	vfio/mdev: embedd struct mdev_parent in the parent data structure	2022-10-04 12:06:58 -06:00
scheduler	docs: scheduler: Update new path for the sysctl knobs	2022-09-27 13:21:42 -06:00
scsi	scsi: core: Fix the scsi_set_resid() documentation	2023-09-13 09:43:00 +02:00
security	KEYS: encrypted: fix key instantiation with user-provided data	2022-12-21 17:48:11 +01:00
sh
sound	ASoC: doc: Fix undefined SND_SOC_DAPM_NOPM argument	2024-02-05 20:12:54 +00:00
sparc
sphinx	docs: kernel_abi.py: fix command injection	2024-01-31 16:17:00 -08:00
sphinx-static
spi
staging	docs: put atomic*.txt and memory-barriers.txt into the core-api book	2022-09-29 12:55:06 -06:00
target
timers
tools	A handful of relatively simple documentation fixes, plus a set of patches	2022-10-13 10:58:32 -07:00
trace	tracing/probes: Add symstr type for dynamic events	2023-08-03 10:23:54 +02:00
translations	docs/zh_CN: Add LoongArch booting description's translation	2022-12-08 15:03:14 +08:00
usb
userspace-api	media: mc: Expand MUST_CONNECT flag to always require an enabled link	2024-04-03 15:19:25 +02:00
virt	x86/sev: Change snp_guest_issue_request()'s fw_err argument	2023-11-20 11:52:13 +01:00
w1	Documentation: W1: minor typo corrections	2022-09-27 13:21:44 -06:00
watchdog
x86	x86/Kconfig: Remove CONFIG_AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT	2024-04-03 15:19:47 +02:00
xtensa
.gitignore
arch.rst
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py	There's not a huge amount of activity in the docs tree this time around,	2022-10-03 10:23:32 -07:00
docutils.conf
dontdiff
index.rst	Rust introduction for v6.1-rc1	2022-10-03 16:39:37 -07:00
Kconfig
Makefile
memory-barriers.txt
SubmittingPatches
subsystem-apis.rst	docs: Rewrite the front page	2022-09-29 12:55:06 -06:00