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From: Ingo Molnar <mingo@kernel.org>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: robert.foss@collabora.com, rostedt@goodmis.org, mingo@redhat.com,
	scott@ubuntu.com, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org
Subject: Re: [PACTH v1] trace: Add trace events for open(), exec() and uselib()
Date: Tue, 2 Aug 2016 10:11:46 +0200	[thread overview]
Message-ID: <20160802081146.GA9601@gmail.com> (raw)
In-Reply-To: <20160801181014.GB2356@ZenIV.linux.org.uk>


* Al Viro <viro@ZenIV.linux.org.uk> wrote:

> On Mon, Aug 01, 2016 at 01:25:40PM -0400, robert.foss@collabora.com wrote:
> > From: Scott James Remnant <scott@ubuntu.com>
> > 
> > This patch uses TRACE_EVENT to add tracepoints for the open(),
> > exec() and uselib() syscalls so that ureadahead can cheaply trace
> > the boot sequence to determine what to read to speed up the next.
> 
> NAK.  No Tracepoints In VFS.  Not going to happen - any tracepoint can all too
> easily become a cast-in-stone userland ABI.

And what's the problem with that? ABIs increase the utility of the kernel.

Thanks,

	Ingo

      parent reply	other threads:[~2016-08-02  8:14 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-01 17:25 [PACTH v1] trace: Add trace events for open(), exec() and uselib() robert.foss
2016-08-01 17:44 ` Steven Rostedt
2016-08-01 18:13   ` Al Viro
2016-08-01 18:10 ` Al Viro
2016-08-01 19:51   ` Robert Foss
2016-08-01 20:31     ` Steven Rostedt
2016-08-02  8:11   ` Ingo Molnar [this message]

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