From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
To: Jens Axboe <axboe@kernel.dk>
Cc: Jesper Juhl <jj@chaosbits.net>,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Tom Zanussi <zanussi@us.ibm.com>,
Karim Yaghmour <karim@opersys.com>,
Paul Mundt <lethal@linux-sh.org>,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH] Optimize relay_alloc_page_array() slightly by using vzalloc rather than vmalloc and memset
Date: Mon, 1 Nov 2010 09:08:42 -0400 [thread overview]
Message-ID: <20101101130842.GA24605@Krystal> (raw)
In-Reply-To: <4CCEB723.2010005@kernel.dk>
* Jens Axboe (axboe@kernel.dk) wrote:
> On 2010-10-30 17:47, Mathieu Desnoyers wrote:
> > BLK_DEV_IO_TRACE seems to still select RELAY. Has it completed its
> > transition to either Ftrace or Perf ? Depending on Jens, moving blktrace
> > relay dependency to the Generic Ring Buffer Library might be a good
> > option to consider.
>
> The blktrace user bits is still (by far) the most wide spread way that
> blktrace is used in the field, and those still rely on relayfs. So no,
> we can't kill it now.
What I am proposing is that the Generic Ring Buffer Library could
replace relayfs without changing any of the interfaces blktrace exposes
to user-space. Indeed, I would not remove relayfs unless there was a
replacement.
Thanks,
Mathieu
--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
next prev parent reply other threads:[~2010-11-01 13:13 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-30 20:26 [PATCH] Optimize relay_alloc_page_array() slightly by using vzalloc rather than vmalloc and memset Jesper Juhl
2010-10-30 21:47 ` Mathieu Desnoyers
2010-10-30 21:50 ` Jesper Juhl
2010-10-31 18:39 ` Mathieu Desnoyers
2010-11-01 0:46 ` Andrew Morton
2010-11-01 6:58 ` Pekka Enberg
2010-11-01 11:27 ` Mathieu Desnoyers
2010-11-01 12:26 ` Américo Wang
2010-11-01 13:38 ` Mathieu Desnoyers
2010-11-01 12:22 ` Américo Wang
2010-11-01 13:00 ` el es
2010-11-01 12:48 ` Jens Axboe
2010-11-01 13:08 ` Mathieu Desnoyers [this message]
2010-11-01 13:34 ` Jens Axboe
2010-11-01 13:41 ` Pekka Enberg
2010-11-01 13:42 ` Jens Axboe
2010-11-01 16:00 ` Mathieu Desnoyers
2010-11-01 18:02 ` Jesper Juhl
2010-11-01 18:26 ` Mathieu Desnoyers
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