From: Christoph Hellwig <hch@infradead.org>
To: Josh Stone <jistone@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Jason Baron <jbaron@redhat.com>,
mingo@elte.hu, rostedt@goodmis.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] export softirq_to_name symbol
Date: Fri, 1 May 2009 16:10:28 -0400 [thread overview]
Message-ID: <20090501201028.GA2084@infradead.org> (raw)
In-Reply-To: <49FB5686.8020908@redhat.com>
On Fri, May 01, 2009 at 01:07:34PM -0700, Josh Stone wrote:
> I'm adding SystemTap support for the format strings in the TRACE_EVENT
> macros. The softirq's TP_fast_assign uses softirq_to_name, and so that
> array is needed to prepare the softirq's trace string.
>
> So, there's no explicit reference to the symbol in SystemTap -- it's
> just indirectly referenced by the tracepoint declaration.
TP_fast_assign should only be called by core code, it's the piece that
copies the trace into the ring buffer. If systemtap copies events into
the ring buffer from modular code something is deeply wrong in it's
design.
next prev parent reply other threads:[~2009-05-01 20:10 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-01 19:30 [PATCH] export softirq_to_name symbol Jason Baron
2009-05-01 19:50 ` Christoph Hellwig
2009-05-01 20:07 ` Josh Stone
2009-05-01 20:10 ` Christoph Hellwig [this message]
2009-05-01 20:17 ` Josh Stone
2009-05-01 20:22 ` Christoph Hellwig
2009-05-01 21:25 ` Josh Stone
2009-05-03 18:36 ` Frederic Weisbecker
2009-05-03 8:33 ` Ingo Molnar
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