From: Don Zickus <dzickus@redhat.com>
To: Huang Ying <ying.huang@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>, "H. Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org, Andi Kleen <andi@firstfloor.org>
Subject: Re: [RFC 4/6] x86, NMI, Rewrite NMI handler
Date: Fri, 10 Sep 2010 11:56:05 -0400 [thread overview]
Message-ID: <20100910155605.GG4879@redhat.com> (raw)
In-Reply-To: <1284087065-32722-4-git-send-email-ying.huang@intel.com>
On Fri, Sep 10, 2010 at 10:51:03AM +0800, Huang Ying wrote:
> The original NMI handler is quite outdated in many aspects. This patch
> try to fix it.
>
> In original code, NMI reason io port (0x61) is only processed on
> BSP. This makes it impossible to hot-remove BSP. To solve the issue,
> a raw spinlock is used to make the port can be processed on any CPU.
Do we really want to use a spinlock inside the nmi handler?
I thought the NMIs sent to the io port are only routed to one cpu as
determined by the io-apic? Is it spread out to other cpus now?
Cheers,
Don
next prev parent reply other threads:[~2010-09-10 15:56 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-10 2:51 [RFC 1/6] x86, NMI, Add symbol definition for NMI magic constants Huang Ying
2010-09-10 2:51 ` [RFC 2/6] x86, NMI, Add touch_nmi_watchdog to io_check_error delay Huang Ying
2010-09-10 2:51 ` [RFC 3/6] x86, NMI, Rename memory parity error to PCI SERR error Huang Ying
2010-09-13 1:02 ` Robert Richter
2010-09-13 2:02 ` Huang Ying
2010-09-16 8:18 ` Robert Richter
2010-09-17 0:08 ` Huang Ying
2010-09-17 9:14 ` Robert Richter
2010-09-19 0:20 ` Huang Ying
2010-09-20 8:00 ` Robert Richter
2010-09-20 12:59 ` Borislav Petkov
2010-09-21 0:22 ` Huang Ying
2010-09-21 6:37 ` Borislav Petkov
2010-09-21 14:08 ` Doug Thompson
2010-09-21 23:04 ` Maciej W. Rozycki
2010-09-23 5:37 ` huang ying
2010-09-29 0:26 ` Maciej W. Rozycki
2010-09-10 2:51 ` [RFC 4/6] x86, NMI, Rewrite NMI handler Huang Ying
2010-09-10 15:56 ` Don Zickus [this message]
2010-09-10 16:03 ` Andi Kleen
2010-09-10 18:29 ` Don Zickus
2010-09-13 2:09 ` Huang Ying
2010-09-13 14:04 ` Don Zickus
2010-09-14 5:12 ` Huang Ying
2010-09-14 13:37 ` Don Zickus
2010-09-13 1:16 ` Robert Richter
2010-09-10 2:51 ` [RFC 5/6] x86, NMI, Add support to notify hardware error with unknown NMI Huang Ying
2010-09-10 16:02 ` Don Zickus
2010-09-10 16:19 ` Andi Kleen
2010-09-10 18:40 ` Don Zickus
2010-09-13 2:19 ` Huang Ying
2010-09-13 14:11 ` Don Zickus
2010-09-13 15:24 ` Andi Kleen
2010-09-13 15:47 ` Don Zickus
2010-09-13 16:57 ` Andi Kleen
2010-09-13 17:53 ` Don Zickus
2010-09-13 18:07 ` Andi Kleen
2010-09-13 18:23 ` Don Zickus
2010-09-13 18:36 ` Andi Kleen
2010-09-13 19:36 ` Don Zickus
2010-09-13 20:49 ` Andi Kleen
2010-09-13 21:25 ` Valdis.Kletnieks
2010-09-14 7:48 ` Andi Kleen
2010-09-14 17:54 ` Valdis.Kletnieks
2010-09-14 12:21 ` Ingo Molnar
2010-09-14 13:45 ` Don Zickus
2010-09-14 19:34 ` Cyrill Gorcunov
2010-09-15 9:29 ` Ingo Molnar
2010-09-10 2:51 ` [RFC 6/6] x86, NMI, Remove do_nmi_callback logic Huang Ying
2010-09-10 16:13 ` Don Zickus
2010-09-13 2:27 ` Huang Ying
2010-09-13 6:24 ` Ingo Molnar
2010-09-10 20:37 ` [RFC 1/6] x86, NMI, Add symbol definition for NMI magic constants Peter Zijlstra
2010-09-10 22:58 ` H. Peter Anvin
2010-09-11 8:50 ` Andi Kleen
2010-09-13 1:30 ` Robert Richter
2010-09-21 21:48 ` Don Zickus
2010-09-21 22:19 ` Andi Kleen
2010-09-22 16:07 ` Don Zickus
2010-09-23 9:29 ` huang ying
2010-09-23 14:16 ` Don Zickus
2010-09-24 11:50 ` huang ying
2010-09-24 14:29 ` Don Zickus
2010-09-23 9:51 ` huang ying
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