opnsense-src/sys
Mark Johnston 02324ae827 uma: Avoid excessive per-CPU draining
After commit 389a3fa693, uma_reclaim_domain(UMA_RECLAIM_DRAIN_CPU)
calls uma_zone_reclaim_domain(UMA_RECLAIM_DRAIN_CPU) twice on each zone
in addition to globally draining per-CPU caches. This was unintended
and is unnecessarily slow; in particular, draining per-CPU caches
requires binding to each CPU.

Stop draining per-CPU caches when visiting each zone, just do it once in
pcpu_cache_drain_safe() to minimize the amount of expensive sched_bind()
calls.

Fixes:		389a3fa693 ("uma: Add UMA_ZONE_UNMANAGED")
MFC after:	1 week
Sponsored by:	Klara, Inc.
Sponsored by:	NetApp, Inc.
Reviewed by:	gallatin, kib
Differential Revision:	https://reviews.freebsd.org/D49349

(cherry picked from commit f506d5af50fccc37f5aa9fe090e9a0d5f05506c8)
2025-03-31 18:35:33 +00:00
..
amd64 bhyve: fix CPUID L3 Cache Size reporting for AMD/SVM 2025-03-12 02:25:02 +02:00
arm armada38x: implement gateclk clkdev methods 2025-03-04 11:11:46 -04:00
arm64 arm64: bus: Add 36-bit address mask for use in bus space allocations 2025-03-15 07:05:23 +00:00
bsm timerfd: Move implementation from linux compat to sys/kern 2023-08-24 14:28:56 -06:00
cam cam: Add 3e/3 as a fatal code 2025-01-24 15:34:19 -07:00
cddl dtrace: fix signature mismatch for taskqueue callbacks 2025-03-07 22:51:49 +00:00
compat linux: Handle IP_RECVTOS cmsg type 2025-03-31 10:43:06 -07:00
conf kern.mk: Update SSP comment (not limited to GCC) 2025-03-26 14:36:13 -04:00
contrib iwlwifi: adjust a debug comment referring to a PR 2025-03-19 22:22:15 +00:00
crypto openssl: update ASM and version info for 3.0.16 import 2025-03-25 14:07:59 -07:00
ddb ddb: Add sysctl flag CTLFLAG_TUN to loader tunable 2023-10-12 12:08:18 +08:00
dev acpi_ibm: pass brightness events to evdev(4) 2025-03-31 10:31:21 -07:00
dts add allwinner overlays for enabling additional USB ports 2024-02-17 16:15:10 +02:00
fs nfscl: Return appropriate reply status for NFSv4.1 callbacks 2025-03-04 19:30:00 -08:00
gdb sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16 11:54:36 -06:00
geom g_dev_orphan(): Return early if the device is already gone 2025-03-14 11:51:03 -06:00
gnu sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16 11:54:36 -06:00
i386 cpu_set_upcall / linux_clone_thread: Remove calls to cpu_thread_clean 2025-03-03 11:56:20 -05:00
isa isa: Use a bus_child_deleted method to free ivars for children 2024-11-30 21:46:06 -05:00
kern kern/kern_descrip.c: remove unneeded headers 2025-03-28 02:32:28 +02:00
kgssapi nfscl/kgssapi: Fix Kerberized NFS mounts to pNFS servers 2023-12-23 17:03:58 -08:00
libkern libkern: strdup.c, strndup.c: Prefer memcpy() over bcopy() 2025-03-03 22:56:34 +08:00
modules acpi_ibm: pass brightness events to evdev(4) 2025-03-31 10:31:21 -07:00
net routing: do not allow PINNED routes to be overriden 2025-03-18 12:09:33 +03:00
net80211 net80211: Fix IEEE80211_KEY_UNDEFINED() in ieee80211_node_delucastkey() 2025-03-19 22:22:15 +00:00
netgraph ng_hci: add support for Bluetooth Secure Simple Pairing 2025-02-09 00:36:04 +00:00
netinet tcp: don't ever return ECONNRESET on close(2) 2025-03-31 10:31:21 -07:00
netinet6 ip6_cksum.c: generalize in6_cksum_partial() to allow L2 headers in passed mbuf 2025-03-20 05:13:36 +02:00
netipsec pfkey2: use correct value for a key length 2025-03-13 13:21:30 +03:00
netlink netlink/route: validate family attribute 2025-03-31 10:31:21 -07:00
netpfil ipfw: fix dump_soptcodes() handler 2025-03-13 13:17:37 +03:00
netsmb netsmb: Stop checking for failures from malloc(M_WAITOK) 2024-09-30 12:44:16 +08:00
nfs sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16 11:54:36 -06:00
nfsclient sys: Remove $FreeBSD$: one-line .h pattern 2023-08-16 11:54:18 -06:00
nfsserver sys: Remove $FreeBSD$: one-line .h pattern 2023-08-16 11:54:18 -06:00
nlm sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16 11:54:36 -06:00
ofed ibcore: Mark write-only variables 2024-07-15 12:28:53 +00:00
opencrypto ktls: Remove the socket parameter to ktls_ocf_try() 2024-07-23 09:01:30 -04:00
powerpc powernv: Explicitly enable the facilities we support 2025-03-27 22:32:20 -04:00
riscv atomics: Constify loads: riscv: Convert missed atomic_load_acq_64() 2025-01-27 19:19:52 +01:00
rpc nfs, rpc: Ensure kernel credentials have at least one group 2024-11-15 11:47:43 +01:00
security MAC: mac_biba, mac_lomac: Fix setting loader tunables 2025-02-13 18:19:56 +08:00
sys posix: POSIX-1.2008 moved SA_* from XSI to base standard 2025-03-14 11:51:03 -06:00
teken teken: fix style in teken_wcwidth.h 2023-10-21 17:28:35 +03:00
tests tests: Stop checking for failures from malloc(M_WAITOK) 2024-09-30 12:44:18 +08:00
tools vnode: Make the vop_vector reference a pointer to const 2024-12-03 01:02:10 +00:00
ufs Get consistent updates for UFS superblocks. 2025-03-28 17:41:04 -07:00
vm uma: Avoid excessive per-CPU draining 2025-03-31 18:35:33 +00:00
x86 mca_log: add missing breaks when handling thresholds 2025-03-26 14:27:24 -07:00
xdr rpc: Fix the definition of xdr_void() 2024-11-05 01:05:26 +00:00
xen sys: Remove $FreeBSD$: one-line sh pattern 2023-08-16 11:54:58 -06:00
Makefile sys: Remove $FreeBSD$: one-line sh pattern 2023-08-16 11:54:58 -06:00
README.md sys/README.md: Add a section for documentation 2023-08-03 11:07:41 -03:00

FreeBSD Kernel Source:

This directory contains the source files and build glue that make up the FreeBSD kernel and its modules, including both original and contributed software.

Kernel configuration files are located in the conf/ subdirectory of each architecture. GENERIC is the configuration used in release builds. NOTES contains documentation of all possible entries. LINT is a compile-only configuration used to maximize build coverage and detect regressions.

Documentation:

Source code documentation is maintained in a set of man pages, under section 9. These pages are located in share/man/man9, from the top-level of the src tree. Consult intro(9) for an overview of existing pages.

Some additional high-level documentation of the kernel is maintained in the Architecture Handbook.

Source Roadmap:

Directory Description
amd64 AMD64 (64-bit x86) architecture support
arm 32-bit ARM architecture support
arm64 64-bit ARM (AArch64) architecture support
cam Common Access Method storage subsystem - cam(4) and ctl(4)
cddl CDDL-licensed optional sources such as DTrace
conf kernel build glue
compat Linux compatibility layer, FreeBSD 32-bit compatibility
contrib 3rd-party imported software such as OpenZFS
crypto crypto drivers
ddb interactive kernel debugger - ddb(4)
fs most filesystems, excluding UFS, NFS, and ZFS
dev device drivers and other arch independent code
gdb kernel remote GDB stub - gdb(4)
geom GEOM framework - geom(4)
i386 i386 (32-bit x86) architecture support
kern main part of the kernel
libkern libc-like and other support functions for kernel use
modules kernel module infrastructure
net core networking code
net80211 wireless networking (IEEE 802.11) - net80211(4)
netgraph graph-based networking subsystem - netgraph(4)
netinet IPv4 protocol implementation - inet(4)
netinet6 IPv6 protocol implementation - inet6(4)
netipsec IPsec protocol implementation - ipsec(4)
netpfil packet filters - ipfw(4), pf(4), and ipfilter(4)
opencrypto OpenCrypto framework - crypto(7)
powerpc PowerPC/POWER (32 and 64-bit) architecture support
riscv 64-bit RISC-V architecture support
security security facilities - audit(4) and mac(4)
sys kernel headers
tests kernel unit tests
ufs Unix File System - ffs(7)
vm virtual memory system
x86 code shared by AMD64 and i386 architectures