Received-SPF: pass (google.com: domain of linux-kernel+bounces-96594-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249;
From: Haifeng Xu <haifeng.xu@shopee.com>
To: reinette.chatre@intel.com,
	james.morse@arm.com
Cc: fenghua.yu@intel.com,
	babu.moger@amd.com,
	tglx@linutronix.de,
	mingo@redhat.com,
	bp@alien8.de,
	dave.hansen@linux.intel.com,
	hpa@zytor.com,
	peternewman@google.com,
	x86@kernel.org,
	linux-kernel@vger.kernel.org,
	corbet@lwn.net,
	linux-doc@vger.kernel.org,
	Haifeng Xu <haifeng.xu@shopee.com>
Subject: [PATCH v5 0/2] x86/resctrl: Track llc_occupancy of RMIDs in limbo list
Date: Fri,  8 Mar 2024 15:41:30 +0800
Message-Id: <20240308074132.409107-1-haifeng.xu@shopee.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

After removing a monitor group, its RMID may not be freed immediately
unless its llc_occupancy is less than the re-allocation threshold. If
turning up the threshold, the RMID can be reused. In order to know how
much the threshold should be, it's necessary to acquire the llc_occupancy.

The patch series provides a new tracepoint to track the llc_occupancy.

Changes since v1:
- Rename pseudo_lock_event.h instead of creating a new header file.
- Modify names used in the tracepoint.
- Update changelog.

Changes since v2:
- Fix typo and use the x86/resctrl subject prefix in the cover letter.
- Track both CLOSID and RMID in the tracepoint.
- Remove the details on how perf can be used in patch2's changelog.

Changes since v3:
- Put the tracepoint in the 'else' section of the if/else after
  resctrl_arch_rmid_read().
- Modify names used in the tracepoint.
- Document the properties of the tracepoint.

Changes since v4:
- Add Reviewed-by tags.
- Include more maintainers in the submission.

Haifeng Xu (2):
  x86/resctrl: Rename pseudo_lock_event.h to trace.h
  x86/resctrl: Add tracepoint for llc_occupancy tracking

 Documentation/arch/x86/resctrl.rst            |  8 +++++++
 arch/x86/kernel/cpu/resctrl/monitor.c         |  9 ++++++++
 arch/x86/kernel/cpu/resctrl/pseudo_lock.c     |  2 +-
 .../resctrl/{pseudo_lock_event.h => trace.h}  | 22 ++++++++++++++++---
 4 files changed, 37 insertions(+), 4 deletions(-)
 rename arch/x86/kernel/cpu/resctrl/{pseudo_lock_event.h => trace.h} (57%)

-- 
2.25.1