linux-kernel - Re: Unified tracing buffer

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

Date:	Mon, 22 Sep 2008 09:29:33 -0700
From:	"Martin Bligh" <mbligh@...gle.com>
To:	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>
Cc:	prasad@...ux.vnet.ibm.com,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Mathieu Desnoyers" <compudj@...stal.dyndns.org>,
	"Steven Rostedt" <rostedt@...dmis.org>, od@...ell.com,
	"Frank Ch. Eigler" <fche@...hat.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>, hch@....de,
	"David Wilder" <dwilder@...ibm.com>, zanussi@...cast.net
Subject: Re: Unified tracing buffer

>> In conjunction with the previous email on this thread
>> (http://lkml.org/lkml/2008/9/22/160), may I suggest
>> the equivalent interfaces in -mm tree (2.6.27-rc5-mm1) to be:
>>
>> relay_printk(<some struct with default filenames/pathnames>, <string>,
>> ....) ;
>> relay_dump(<some struct with default filenames/pathnames>, <binary
>> data>);
>> and
>> relay_cleanup_all(<the struct name>); - Single interface that cleans up
>> all files/directories/output data created under a logical entity.
>
> Dude, relayfs is such a bad performing mess that extending it seems like
> a bad idea. Better to write something new and delete everything relayfs
> related.

There did seem to be pretty universal agreement that we'd rather not
use relayfs.

> Also, it seems prudent to separate the ring-buffer implementation from
> the event encoding/decoding facilities.

Right - in conversation I had with Mathieu later, he suggested cleaning up
relayfs - I fear this will delay us far too long, and get bogged down.
If we can get one clean circular buffer implementation, then both
relayfs and the tracing could share that common solution,
--
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/