From: Cyrill Gorcunov <gorcunov@openvz.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Don Zickus <dzickus@redhat.com>,
"Huang, Ying" <ying.huang@intel.com>,
"Maciej W. Rozycki" <macro@linux-mips.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -tip 2/2 resend] x86, traps: Drop nmi_reason_lock until it is really needed
Date: Wed, 02 Mar 2011 19:13:42 +0300 [thread overview]
Message-ID: <4D6E6CB6.7000700@openvz.org> (raw)
In-Reply-To: <20110302160315.GA12620@elte.hu>
On 03/02/2011 07:03 PM, Ingo Molnar wrote:
...
>
> Well, the lock serializes the read-out of the 'NMI reason' port, the handling of
> whatever known reason and then the reassertion of the NMI (on 32-bit).
>
> EDAC has a callback in pci_serr_error() - and this lock serializes that. So we
> cannot just remove a lock like that, if there's any chance of parallel execution on
> multiple CPUs.
>
> Thanks,
>
> Ingo
OK, probably we need some UV person CC'ed (not sure whom) just to explain the
reason for such nmi-listening model. Meanwhile -- lets drop my patch.
--
Cyrill
next prev parent reply other threads:[~2011-03-02 16:13 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-02 15:32 [PATCH -tip 2/2 resend] x86, traps: Drop nmi_reason_lock until it is really needed Cyrill Gorcunov
2011-03-02 15:46 ` Ingo Molnar
2011-03-02 15:55 ` Cyrill Gorcunov
2011-03-02 16:03 ` Ingo Molnar
2011-03-02 16:13 ` Cyrill Gorcunov [this message]
2011-03-02 18:40 ` Don Zickus
2011-03-02 19:14 ` Cyrill Gorcunov
2011-03-02 19:46 ` Don Zickus
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D6E6CB6.7000700@openvz.org \
--to=gorcunov@openvz.org \
--cc=dzickus@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=macro@linux-mips.org \
--cc=mingo@elte.hu \
--cc=ying.huang@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.