All of lore.kernel.org
 help / color / mirror / Atom feed
From: Corey Minyard <minyard@acm.org>
To: Andreas Dilger <adilger@clusterfs.com>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: Re: Patch to 2.6.8.1-mm2 to allow multiple NMI handlers to be registered
Date: Thu, 19 Aug 2004 14:27:56 -0500	[thread overview]
Message-ID: <4124FF3C.6080108@acm.org> (raw)
In-Reply-To: <20040819164049.GS8967@schnapps.adilger.int>

Andreas Dilger wrote:

>On Aug 19, 2004  09:35 -0500, Corey Minyard wrote:
>  
>
>>* Allow multiple handlers to be registered and return if they have 
>>handled the NMI or not.  oprofile and nmi_watchdog are modified to use this.
>>    
>>
>
>Why not use a notifier call chain as is done with panic & friends instead
>of implementing the same thing specifically for NMI?
>
>  
>
A couple of reasons:

* The "handled" value needs to be passed around so handler know if 
previous handlers have already handled the NMI.
* It allows the list of registered NMI handlers to be dumped in 
/proc/interrupts

I thought that the notifiers callout used locks (which would be a 
no-go), but it doesn't.  So I can scratch that one from my list.

Thanks,

-Corey

  reply	other threads:[~2004-08-19 19:30 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-08-19 14:35 Patch to 2.6.8.1-mm2 to allow multiple NMI handlers to be registered Corey Minyard
2004-08-19 15:29 ` Mikael Pettersson
2004-08-19 16:16   ` Corey Minyard
2004-08-19 16:27     ` Mikael Pettersson
2004-08-19 16:45       ` Andreas Schwab
2004-08-19 16:31     ` John Levon
2004-08-20 22:42       ` Zwane Mwaikambo
2004-08-19 19:15   ` Corey Minyard
2004-08-19 16:40 ` Andreas Dilger
2004-08-19 19:27   ` Corey Minyard [this message]
  -- strict thread matches above, loose matches on Subject: below --
2004-08-21 10:26 Mikael Pettersson

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=4124FF3C.6080108@acm.org \
    --to=minyard@acm.org \
    --cc=adilger@clusterfs.com \
    --cc=linux-kernel@vger.kernel.org \
    /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.