[PATCH v10 00/30] x86/resctrl: Move the resctrl filesystem code to /fs/resctrl
From: James Morse
Date: Thu May 08 2025 - 13:19:31 EST
Changes since v8:
* Rebased onto the cpumask optimisations.
* Assorted commit message and comment clarifications.
Changes otherwise noted on each patch.
---
Patches 24-29 should be squashed together when merged, taking the commit message
of patch 25. It probably makes sense to drop the tags at that point as patch 25 is
generated by a script, and impossible to review. They are posted like this to allow
folk to re-generate patch 25, then review the differences on top. Not squashing them
together would expose a ftrace build warning during bisect. (but who does that!)
The result should look like this:
git://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/move_to_fs/v10_final
I can also post the 'final' version to be picked up if that is less work.
This series is based on rc5, and can be retrieved from:
git://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/move_to_fs/v10
With the exception of invalid configurations for the configurable-events, there
should be no changes in behaviour caused by this series. It is now possible for
throttle_mode to report 'undefined', but no known platform will do this.
resctrl_exit() is now something that can be called, but x86 doesn't do this.
The driving pattern is to make things like struct rdtgroup private to resctrl.
Features like pseudo-lock aren't going to work on arm64, the ability to disable
it at compile time is added.
After this, I can start posting the MPAM driver to make use of resctrl on arm64.
(What's MPAM? See the cover letter of the first series. [1])
As ever - bugs welcome,
Thanks,
James
[v9] https://lore.kernel.org/all/20250425173809.5529-1-james.morse@xxxxxxx
[v8] https://lore.kernel.org/all/20250411164229.23413-1-james.morse@xxxxxxx
[v7] https://lore.kernel.org/all/20250228195913.24895-1-james.morse@xxxxxxx/
[v6] https://lore.kernel.org/lkml/20250207181823.6378-1-james.morse@xxxxxxx/
[v5] https://lore.kernel.org/r/20241004180347.19985-1-james.morse@xxxxxxx
[v4] https://lore.kernel.org/all/20240802172853.22529-1-james.morse@xxxxxxx/
[v3] https://lore.kernel.org/r/20240614150033.10454-1-james.morse@xxxxxxx
[v2] https://lore.kernel.org/r/20240426150537.8094-1-Dave.Martin@xxxxxxx
[v1] https://lore.kernel.org/r/20240321165106.31602-1-james.morse@xxxxxxx
[1] https://lore.kernel.org/lkml/20201030161120.227225-1-james.morse@xxxxxxx/
Amit Singh Tomar (1):
x86/resctrl: Remove the limit on the number of CLOSID
Dave Martin (3):
x86/resctrl: Squelch whitespace anomalies in resctrl core code
x86/resctrl: Prefer alloc(sizeof(*foo)) idiom in rdt_init_fs_context()
x86/resctrl: Relax some asm #includes
James Morse (22):
x86/resctrl: Rename resctrl_sched_in() to begin with "resctrl_arch_"
x86/resctrl: Check all domains are offline in resctrl_exit()
x86/resctrl: resctrl_exit() teardown resctrl but leave the mount point
x86/resctrl: Drop __init/__exit on assorted symbols
x86/resctrl: Move is_mba_sc() out of core.c
x86/resctrl: Add end-marker to the resctrl_event_id enum
x86/resctrl: Expand the width of domid by replacing mon_data_bits
x86/resctrl: Split trace.h
x86/resctrl: Add 'resctrl' to the title of the resctrl documentation
fs/resctrl: Add boiler plate for external resctrl code
x86/resctrl: Move the filesystem bits to headers visible to fs/resctrl
x86/resctrl: Move enum resctrl_event_id to resctrl.h
x86/resctrl: Fix types in resctrl_arch_mon_ctx_{alloc,free}() stubs
x86/resctrl: Move pseudo lock prototypes to include/linux/resctrl.h
x86/resctrl: Always initialise rid field in rdt_resources_all[]
x86/resctrl: Remove a newline to avoid confusing the code move script
x86,fs/resctrl: Move the resctrl filesystem code to live in
/fs/resctrl
x86,fs/resctrl: Remove duplicated trace header files
fs/resctrl: Remove unnecessary includes
fs/resctrl: Change internal.h's header guard macros
x86,fs/resctrl: Move resctrl.rst to live under
Documentation/filesystems
MAINTAINERS: Add reviewers for fs/resctrl
Yury Norov [NVIDIA] (4):
cpumask: relax cpumask_any_but()
find: add find_first_andnot_bit()
cpumask: add cpumask_{first,next}_andnot() API
x86/resctrl: Optimize cpumask_any_housekeeping()
Documentation/arch/x86/index.rst | 1 -
Documentation/filesystems/index.rst | 1 +
.../{arch/x86 => filesystems}/resctrl.rst | 6 +-
MAINTAINERS | 5 +-
arch/Kconfig | 8 +
arch/x86/Kconfig | 11 +-
arch/x86/include/asm/resctrl.h | 19 +-
arch/x86/kernel/cpu/resctrl/Makefile | 2 +
arch/x86/kernel/cpu/resctrl/core.c | 31 +-
arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 635 ---
arch/x86/kernel/cpu/resctrl/internal.h | 399 +-
arch/x86/kernel/cpu/resctrl/monitor.c | 918 +---
arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 1092 +----
.../resctrl/{trace.h => pseudo_lock_trace.h} | 26 +-
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 4164 +---------------
arch/x86/kernel/process_32.c | 2 +-
arch/x86/kernel/process_64.c | 2 +-
fs/Kconfig | 1 +
fs/Makefile | 1 +
fs/resctrl/Kconfig | 39 +
fs/resctrl/Makefile | 6 +
fs/resctrl/ctrlmondata.c | 661 +++
fs/resctrl/internal.h | 426 ++
fs/resctrl/monitor.c | 929 ++++
fs/resctrl/monitor_trace.h | 33 +
fs/resctrl/pseudo_lock.c | 1105 +++++
fs/resctrl/rdtgroup.c | 4344 +++++++++++++++++
include/linux/cpumask.h | 75 +-
include/linux/find.h | 25 +
include/linux/resctrl.h | 36 +-
include/linux/resctrl_types.h | 16 +-
lib/find_bit.c | 11 +
32 files changed, 7763 insertions(+), 7267 deletions(-)
rename Documentation/{arch/x86 => filesystems}/resctrl.rst (99%)
rename arch/x86/kernel/cpu/resctrl/{trace.h => pseudo_lock_trace.h} (56%)
create mode 100644 fs/resctrl/Kconfig
create mode 100644 fs/resctrl/Makefile
create mode 100644 fs/resctrl/ctrlmondata.c
create mode 100644 fs/resctrl/internal.h
create mode 100644 fs/resctrl/monitor.c
create mode 100644 fs/resctrl/monitor_trace.h
create mode 100644 fs/resctrl/pseudo_lock.c
create mode 100644 fs/resctrl/rdtgroup.c
--
2.39.5