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Message-ID: <20240724203322.2765486-1-pasha.tatashin@soleen.com>
Date: Wed, 24 Jul 2024 20:33:19 +0000
From: Pasha Tatashin <pasha.tatashin@...een.com>
To: akpm@...ux-foundation.org,
jpoimboe@...nel.org,
pasha.tatashin@...een.com,
kent.overstreet@...ux.dev,
peterz@...radead.org,
nphamcs@...il.com,
cerasuolodomenico@...il.com,
surenb@...gle.com,
lizhijian@...itsu.com,
willy@...radead.org,
shakeel.butt@...ux.dev,
vbabka@...e.cz,
ziy@...dia.com,
linux-kernel@...r.kernel.org,
linux-mm@...ck.org
Subject: [PATCH v5 0/3] Kernel stack usage histogram
Provide histogram of stack sizes for the exited threads:
Example outputs:
Intel:
$ grep kstack /proc/vmstat
kstack_1k 3
kstack_2k 188
kstack_4k 11391
kstack_8k 243
kstack_16k 0
ARM with 64K page_size:
$ grep kstack /proc/vmstat
kstack_1k 1
kstack_2k 340
kstack_4k 25212
kstack_8k 1659
kstack_16k 0
kstack_32k 0
kstack_64k 0
Changelog:
v5:
Uninlined stack_not_used() and kstack_histogram() per mailing list
discussion
Use count_vm_event() instead of this_cpu_inc()
Increase memcg_event limit from s8_max to u8_max.
Pasha Tatashin (2):
vmstat: Kernel stack usage histogram
task_stack: uninline stack_not_used
Shakeel Butt (1):
memcg: increase the valid index range for memcg stats
include/linux/sched/task_stack.h | 18 ++--------
include/linux/vm_event_item.h | 24 ++++++++++++++
kernel/exit.c | 57 ++++++++++++++++++++++++++++++++
kernel/sched/core.c | 4 +--
mm/memcontrol.c | 50 ++++++++++++++++------------
mm/vmstat.c | 24 ++++++++++++++
6 files changed, 137 insertions(+), 40 deletions(-)
--
2.45.2.1089.g2a221341d9-goog
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