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Alexander V. Chernikov d187154750 netlink: use custom uma zone for the mbuf storage.
Netlink communicates with userland via sockets, utilising
 MCLBYTES-sized mbufs to append data to the socket buffers.
These mbufs are never transmitted via logical or physical network.

It may be possible that the 2k mbuf zone is temporary exhausted
 due to the DDoS-style traffic, leading to Netlink failure to
 respond to the requests.

To address it, this change introduces a custom Netlink-specific
 zone for the mbuf storage. It has the following benefits:
* no precious memory from UMA_ZONE_CONTIG zones is utilized for Netlink
* Netlink becomes (more) independent from the traffic spikes and
 other related network "corner" conditions.
* Netlink allocations are now isolated within a specific zone, making it
 easier to track Netlink mbuf usage and attribute mbufs.

Reviewed by:	gallatin, adrian
Differential Revision: https://reviews.freebsd.org/D40356
MFC after:	2 weeks
3 hours ago
.cirrus-ci
.github MAINTAINERS: Add myself to stand 3 weeks ago
bin
cddl kinst: fix memcpy() tracing crash 6 days ago
contrib pf: make contents of struct pfsync_state configurable 2 days ago
crypto OpenSSL: Merge OpenSSL 1.1.1u 2 days ago
etc Add simple factor/primes regression tests 5 days ago
gnu
include
kerberos5
lib libunbound: Request the OpenSSL 1.1 API 19 hours ago
libexec Revert "When stopping powerd, set the CPU frequency back to its maximum value" 7 days ago
release release/oci.conf: add missing vm_extra_pre_umount() steps 1 week ago
rescue
sbin decryptcore: add OPENSSL_INIT_LOAD_CONFIG to init call 16 hours ago
secure OpenSSL: Merge OpenSSL 1.1.1u 2 days ago
share pmc: Initialise and check the pm_flags field for CONFIGURELOG 1 day ago
stand stand: libefi: avoid a null pointer deref in eficom 4 days ago
sys netlink: use custom uma zone for the mbuf storage. 3 hours ago
targets
tests netinet*: Fix redirects for connections from localhost 23 hours ago
tools genl: add new command to list genetlink(4) 2 days ago
usr.bin split(1): add '-c' to continue creating files 2 days ago
usr.sbin unbound: avoid calling deprecated OpenSSL function 1 day ago
.arcconfig
.arclint
.cirrus.yml Cirrus-CI: add amd64 and arm64 Clang/LLVM 16 jobs 2 days ago
.clang-format
.git-blame-ignore-revs
.gitattributes
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CONTRIBUTING.md
COPYRIGHT
LOCKS
MAINTAINERS
Makefile
Makefile.inc1
Makefile.libcompat
Makefile.sys.inc
ObsoleteFiles.inc delete-old: add two files left behind in certs/blacklisted 1 week ago
README.md
RELNOTES RELNOTES: add note about moving /usr/home to /home 1 week ago
UPDATING

README.md

FreeBSD Source:

This is the top level of the FreeBSD source directory.

FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.

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