From: Andi Kleen <andi@firstfloor.org>
To: Thomas Graf <tgraf@suug.ch>
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: Re: [PATCH] pkt_sched: Control group classifier
Date: Thu, 16 Oct 2008 07:41:55 +0200 [thread overview]
Message-ID: <873aixksf0.fsf@basil.nowhere.org> (raw)
In-Reply-To: <20081013155715.GZ20815@postel.suug.ch> (Thomas Graf's message of "Mon, 13 Oct 2008 17:57:16 +0200")
Thomas Graf <tgraf@suug.ch> writes:
>
> The principle of the classifier is to directly access the
> task_struct via get_current(). In order for this to work,
> classification requests from softirqs must be ignored.
You mean the classifier just wants to know if it runs
as a softirq?
> This is
> not a problem because the vast majority of packets in softirq
> context are not assigned to a task anyway. For this to work, a
> mechanism is needed to trace softirq context.
> The only existing
> way to do so is to use the TRACE_IRQFLAGS feature, unfortunately
Does't softirq_count() > 0 check that?
-Andi
--
ak@linux.intel.com
next prev parent reply other threads:[~2008-10-16 5:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-13 15:57 [PATCH] pkt_sched: Control group classifier Thomas Graf
2008-10-14 11:56 ` Chei-yol Kim
2008-10-14 17:00 ` Thomas Graf
2008-10-14 17:03 ` Thomas Graf
2008-10-16 5:41 ` Andi Kleen [this message]
2008-10-17 18:23 ` Thomas Graf
2008-10-17 18:32 ` Andi Kleen
2008-10-17 20:09 ` Thomas Graf
2008-10-18 5:38 ` Andi Kleen
2008-10-19 17:00 ` Thomas Graf
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