linux-kernel - [PATCH perf/core 0/4] Improve performance and scalability of uretprobes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241206002417.3295533-1-andrii@kernel.org>
Date: Thu,  5 Dec 2024 16:24:13 -0800
From: Andrii Nakryiko <andrii@...nel.org>
To: linux-trace-kernel@...r.kernel.org,
	peterz@...radead.org,
	mingo@...nel.org
Cc: oleg@...hat.com,
	rostedt@...dmis.org,
	mhiramat@...nel.org,
	bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	jolsa@...nel.org,
	liaochang1@...wei.com,
	kernel-team@...a.com,
	Andrii Nakryiko <andrii@...nel.org>
Subject: [PATCH perf/core 0/4] Improve performance and scalability of uretprobes

Include performance and multi-CPU scalability of uretprobes by avoiding
a rather expensive (and somewhat limiting in terms of multi-CPU scalability)
use of kmalloc()+kfree() combo for short-lived struct return_instance, used
for keeping track of pending return uprobes.

First few patches are preparatory doing some internal refactoring and setting
things up for the actual struct return_instance reuse done in the last patch
of the series.

Andrii Nakryiko (4):
  uprobes: simplify session consumer tracking
  uprobes: decouple return_instance list traversal and freeing
  uprobes: ensure return_instance is detached from the list before
    freeing
  uprobes: reuse return_instances between multiple uretprobes within
    task

 include/linux/uprobes.h |  16 +++-
 kernel/events/uprobes.c | 176 +++++++++++++++++++++++++++-------------
 2 files changed, 133 insertions(+), 59 deletions(-)

-- 
2.43.5