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David S. Miller 982c3e2948 Merge branch 'mlxsw-L3-HW-stats-improvements' 
Ido Schimmel says:

====================
mlxsw: L3 HW stats improvements

While testing L3 HW stats [1] on top of mlxsw, two issues were found:

1. Stats cannot be enabled for more than 205 netdevs. This was fixed in
commit 4b7a632ac4 ("mlxsw: spectrum_cnt: Reorder counter pools").

2. ARP packets are counted as errors. Patch #1 takes care of that. See
the commit message for details.

The goal of the majority of the rest of the patches is to add selftests
that would have discovered that only about 205 netdevs can have L3 HW
stats supported, despite the HW supporting much more. The obvious place
to plug this in is the scale test framework.

The scale tests are currently testing two things: that some number of
instances of a given resource can actually be created; and that when an
attempt is made to create more than the supported amount, the failures
are noted and handled gracefully.

However the ability to allocate the resource does not mean that the
resource actually works when passing traffic. For that, make it possible
for a given scale to also test traffic.

To that end, this patchset adds traffic tests. The goal of these is to
run traffic and observe whether a sample of the allocated resource
instances actually perform their task. Traffic tests are only run on the
positive leg of the scale test (no point trying to pass traffic when the
expected outcome is that the resource will not be allocated). They are
opt-in, if a given test does not expose it, it is not run.

The patchset proceeds as follows:

- Patches #2 and #3 add to "devlink resource" support for number of
  allocated RIFs, and the capacity. This is necessary, because when
  evaluating how many L3 HW stats instances it should be possible to
  allocate, the limiting resource on Spectrum-2 and above currently is
  not the counters themselves, but actually the RIFs.

- Patch #6 adds support for invocation of a traffic test, if a given scale
  tests exposes it.

- Patch #7 adds support for skipping a given scale test. Because on
  Spectrum-2 and above, the limiting factor to L3 HW stats instances is
  actually the number of RIFs, there is no point in running the failing leg
  of a scale tests, because it would test exhaustion of RIFs, not of RIF
  counters.

- With patch #8, the scale tests drivers pass the target number to the
  cleanup function of a scale test.

- In patch #9, add a traffic test to the tc_flower selftests. This makes
  sure that the flow counters installed with the ACLs actually do count as
  they are supposed to.

- In patch #10, add a new scale selftest for RIF counter scale, including a
  traffic test.

- In patch #11, the scale target for the tc_flower selftest is
  dynamically set instead of being hard coded.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ca0a53dcec9495d1dc5bbc369c810c520d728373
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
History 2022-06-17 10:31:34 +01:00
arch Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-06-16 20:13:52 -07:00
block block: remove bioset_init_from_src 2022-06-08 14:04:14 -04:00
certs certs: fix and refactor CONFIG_SYSTEM_BLACKLIST_HASH_LIST build 2022-06-15 21:52:32 +03:00
crypto This update includes the following changes: 2022-05-27 18:06:49 -07:00
Documentation dt-bindings: dp83867: add binding for io_impedance_ctrl nvmem cell 2022-06-16 20:28:53 -07:00
drivers mlxsw: Add a resource describing number of RIFs 2022-06-17 10:31:33 +01:00
fs fs.fixes.v5.19-rc3 2022-06-15 09:04:55 -07:00
include linux/phy.h: add phydev_err_probe() wrapper for dev_err_probe() 2022-06-16 20:29:06 -07:00
init gcc-12: disable '-Warray-bounds' universally for now 2022-06-09 10:11:12 -07:00
ipc These changes update the ipc sysctls so that they are fundamentally 2022-06-03 15:54:57 -07:00
kernel cfi: Fix __cfi_slowpath_diag RCU usage with cpuidle 2022-06-13 09:18:46 -07:00
lib Random number generator fixes for Linux 5.19-rc2. 2022-06-12 10:33:38 -07:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm usercopy: Make usercopy resilient against ridiculously large copies 2022-06-13 09:54:52 -07:00
net tcp: fix possible freeze in tx path under memory pressure 2022-06-17 10:10:41 +01:00
samples drm for 5.19-rc1 2022-05-25 16:18:27 -07:00
scripts Kbuild fixes for v5.19 2022-06-12 11:10:07 -07:00
security KEYS: trusted: tpm2: Fix migratable logic 2022-06-08 14:12:13 +03:00
sound sound fixes for 5.19-rc2 2022-06-10 10:20:57 -07:00
tools selftests: spectrum-2: tc_flower_scale: Dynamically set scale target 2022-06-17 10:31:33 +01:00
usr Not a lot of material this cycle. Many singleton patches against various 2022-05-27 11:22:03 -07:00
virt KVM: x86: disable preemption around the call to kvm_arch_vcpu_{un|}blocking 2022-06-09 10:52:20 -04:00
.clang-format clang-format: Fix space after for_each macros 2022-05-20 19:27:16 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore kbuild: split the second line of *.mod into *.usyms 2022-05-08 03:16:59 +09:00
.mailmap Hot fixes for 5.19-rc1. 2022-06-05 17:05:38 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: replace a Microchip AT91 maintainer 2022-02-09 11:30:01 +01:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-06-16 20:13:52 -07:00
Makefile Linux 5.19-rc2 2022-06-12 16:11:37 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.