From: Benjamin Herrenschmidt <benh@kernel•crashing.org>
To: David Miller <davem@davemloft•net>
Cc: linuxppc-dev@ozlabs•org, paulus@samba•org
Subject: Re: question about softirqs
Date: Sat, 09 May 2009 12:52:43 +1000 [thread overview]
Message-ID: <1241837563.29028.53.camel@pasglop> (raw)
In-Reply-To: <20090508.165358.97542490.davem@davemloft.net>
> > The soft irq stuff is pretty much all generic code these days, except
> > for the code to switch to the softirq stack.
>
> Grumble, when did that happen :-(
>
> That's horrible for latency compared to handling it directly
> in the trap return path.
If it is indeed such a problem, it would be reasonably easy to
handle it in the return-to-userspace path around the same place
where we test for pending signals (isn't what we used to do
anyway ?)
Cheers,
Ben.
next prev parent reply other threads:[~2009-05-09 2:52 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-08 22:51 question about softirqs Chris Friesen
2009-05-08 23:05 ` David Miller
2009-05-08 23:34 ` Paul Mackerras
2009-05-08 23:53 ` David Miller
2009-05-09 2:52 ` Benjamin Herrenschmidt [this message]
2009-05-09 3:31 ` Paul Mackerras
2009-05-09 6:48 ` David Miller
2009-05-11 18:25 ` Chris Friesen
2009-05-11 23:24 ` David Miller
2009-05-12 0:43 ` Chris Friesen
2009-05-12 8:12 ` Ingo Molnar
2009-05-12 9:12 ` Peter Zijlstra
2009-05-12 9:23 ` Ingo Molnar
2009-05-12 9:32 ` Peter Zijlstra
2009-05-12 12:20 ` Steven Rostedt
2009-05-13 4:45 ` David Miller
2009-05-13 4:44 ` David Miller
2009-05-13 5:15 ` Paul Mackerras
2009-05-13 5:28 ` David Miller
2009-05-13 5:55 ` Evgeniy Polyakov
2009-05-12 15:18 ` Chris Friesen
2009-05-13 8:34 ` Andi Kleen
2009-05-13 13:23 ` Chris Friesen
2009-05-13 14:15 ` Andi Kleen
2009-05-13 14:17 ` Thomas Gleixner
2009-05-13 14:24 ` Andi Kleen
2009-05-13 14:54 ` Eric Dumazet
2009-05-13 15:02 ` Andi Kleen
2009-05-13 15:05 ` Chris Friesen
2009-05-13 15:54 ` Thomas Gleixner
2009-05-13 16:10 ` Chris Friesen
2009-05-13 17:01 ` Andi Kleen
2009-05-13 19:04 ` Chris Friesen
2009-05-13 19:13 ` Andi Kleen
2009-05-13 19:44 ` Chris Friesen
2009-05-13 19:53 ` Andi Kleen
2009-05-13 20:55 ` Thomas Gleixner
2009-05-11 23:34 ` Paul Mackerras
2009-05-09 0:28 ` Chris Friesen
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