From: Ingo Molnar <mingo@elte.hu>
To: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@osdl.org>,
Zwane Mwaikambo <zwane@fsmlabs.com>,
linux-kernel@vger.kernel.org, wli@holomorphy.com
Subject: Re: [PATCH] remove LOCK_SECTION from x86_64 spin_lock asm
Date: Thu, 16 Sep 2004 08:51:01 +0200 [thread overview]
Message-ID: <20040916065101.GA11726@elte.hu> (raw)
In-Reply-To: <20040916064428.GD12915@wotan.suse.de>
* Andi Kleen <ak@suse.de> wrote:
> I think the idea was that the spinlock functions should be small
> enough that they don't have any stack local variables. [...]
this might work for x64, but even there, are you sure it works even with
CONFIG_PREEMPT enabled (there the spinlocks are more complex)? It sure
wont work on x86 so i think we need a generic 'soft PC' solution.
the alternative would be to unwind the stack - quite some task on some
platforms ...
Ingo
next prev parent reply other threads:[~2004-09-16 6:49 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-15 16:01 [PATCH] remove LOCK_SECTION from x86_64 spin_lock asm Zwane Mwaikambo
2004-09-15 21:45 ` Andrew Morton
2004-09-15 17:55 ` Zwane Mwaikambo
2004-09-15 21:47 ` Ingo Molnar
2004-09-16 6:13 ` Andi Kleen
2004-09-16 6:27 ` Ingo Molnar
2004-09-16 6:44 ` Andi Kleen
2004-09-16 6:51 ` Ingo Molnar [this message]
2004-09-16 6:53 ` Andi Kleen
2004-09-16 6:58 ` Ingo Molnar
2004-09-16 7:09 ` Andi Kleen
2004-09-16 7:19 ` Ingo Molnar
2004-09-16 7:29 ` Andi Kleen
2004-09-16 7:44 ` Ingo Molnar
2004-09-16 7:53 ` Andi Kleen
2004-09-16 9:01 ` Andi Kleen
2004-09-16 12:44 ` Zwane Mwaikambo
2004-09-16 19:30 ` Ingo Molnar
-- strict thread matches above, loose matches on Subject: below --
2004-09-15 22:42 Andrew Chew
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