linux-kernel - [PATCH 0/2] tracing/workqueue fixes

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20090922023920.GA31801@kryten>
Date:	Tue, 22 Sep 2009 12:39:20 +1000
From:	Anton Blanchard <anton@...ba.org>
To:	Frederic Weisbecker <fweisbec@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Li Zefan <lizf@...fujitsu.com>,
	Zhaolei <zhaolei@...fujitsu.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Ingo Molnar <mingo@...e.hu>,
	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 0/2] tracing/workqueue fixes

Hi,

The workqueue tracepoint patchset looks to have stalled for a bit. While
we discuss how much functionality we want in kernel, I think we have a
solid case for tracing the latency caused by workqueue events.

For an example we can look at the rt_worker_func work. As memory grew its
duration would also grow, and I measured 14ms spikes on one box. Once found
we placed a cap on it:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c9503e0fe052020e0294cd07d0ecd982eb7c9177

The following patches add entry and exit tracepoints so we can find these
things easily.

Anton
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/