From: Richard Henderson <rth@twiddle.net>
To: "David S. Miller" <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
mingo@elte.hu, tony.luck@intel.com, linux-kernel@vger.kernel.org,
akpm@osdl.org, nickpiggin@yahoo.com.au,
linux-arch@vger.kernel.org
Subject: Re: [patch] sched: unlocked context-switches
Date: Sun, 10 Apr 2005 00:23:57 -0700 [thread overview]
Message-ID: <20050410072357.GA2155@twiddle.net> (raw)
In-Reply-To: <20050409154612.55d6a6fa.davem@davemloft.net>
On Sat, Apr 09, 2005 at 03:46:12PM -0700, David S. Miller wrote:
> On Sat, 09 Apr 2005 19:22:23 +1000
> Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
>
> > ppc64 already has a local_irq_save/restore in switch_to, around the low
> > level asm bits, so it should be fine.
>
> Sparc64 essentially does as well. In fact, it uses an IRQ disable
> which is stronger than local_irq_save in that it disables reception
> of CPU cross-calls as well.
Alpha does the switch in PALmode, which is never interruptable.
r~
next prev parent reply other threads:[~2005-04-10 7:23 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-08 18:38 [patch] sched: unlocked context-switches Luck, Tony
2005-04-09 4:38 ` Ingo Molnar
2005-04-09 6:28 ` Nick Piggin
2005-04-09 6:55 ` Ingo Molnar
2005-04-09 7:11 ` Nick Piggin
2005-04-09 9:22 ` Benjamin Herrenschmidt
2005-04-09 22:46 ` David S. Miller
2005-04-10 7:23 ` Richard Henderson [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-04-08 12:16 Ingo Molnar
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