linux-kernel - Re: [PATCH v2 0/7] blktrace: last round of 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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20090327094207.GB8234@elte.hu>
Date:	Fri, 27 Mar 2009 10:42:07 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	Jens Axboe <jens.axboe@...cle.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 0/7] blktrace: last round of fixes


* Li Zefan <lizf@...fujitsu.com> wrote:

> This is the last round of fixes for blktrace, I hope.  :) 
> 
> Changelog v1 -> v2:
>   - fix a bug in "blktrace: make classic output more classic",
>     and rebase other patches.
>   - re-order patches.
>   - a new patch for filtering BLK_TN_MESSAGE
> 
> 
> [PATCH v2 1/6] trace: make 'mem' argument of trace_seq_putmem() const
> [PATCH v2 2/6] blktrace: make classic output more classic
> [PATCH v2 3/6] blktrace: fix blk_probes_ref chaos
> [PATCH v2 4/6] blktrace: fix memory leak when freeing struct blk_io_trace
> [PATCH v2 5/6] blktrace: extract duplidate code
> [PATCH v2 6/6] blktrace: print out BLK_TN_MESSAGE properly

thanks Li!

I think we can do the following ordering. First apply the fixes:

> [PATCH v2 1/6] trace: make 'mem' argument of trace_seq_putmem() const
> [PATCH v2 3/6] blktrace: fix blk_probes_ref chaos
> [PATCH v2 4/6] blktrace: fix memory leak when freeing struct blk_io_trace

These mostly relate to mixed use of ioctl and ftrace based block 
tracing - which is rare but indeed possible. The fixes and cleanups 
you did to refcounting look good.

These bits:

> [PATCH v2 2/6] blktrace: make classic output more classic
> [PATCH v2 5/6] blktrace: extract duplidate code
> [PATCH v2 6/6] blktrace: print out BLK_TN_MESSAGE properly

are optional improvements. The BLK_TN_MESSAGE filter addition - 
Jens, are you fine with that feature addition? (it certainly looks 
like a nice thing to me.)

Also, note that we'll get even more in-kernel filtering capabilities 
in blktrace if we convert the tracepoints to TRACE_EVENT().

Reviewed-by: Ingo Molnar <mingo@...e.hu>

	Ingo
--
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/