Re: Hardware Error Kernel Mini-Summit

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From: Andi Kleen
Date: Tuesday, May 18, 2010 - 11:10 am

On Tue, May 18, 2010 at 01:50:36PM -0300, Mauro Carvalho Chehab wrote:

Well there are different use cases.

mcelog mainly deals in thresholds (including fancy ones like 
per page and per object thresholds) and events and actions to thresholds
(= more events), all your proposals are dealing with objects counts currently.

It does per object counting too, but only incidentially.

I suspect there are use cases for both, although I personally suspect
for most people events, thresholds and their actions are the most useful
thing to handle by default. But one size doesn't fit all.

Anyways it boils down you need different interfaces for different things.

For example there will be always events versus accounting. 

You can synthesize accounting from events (that is what mcelog
does today). The other way round does not work so well unfortunately,
or at least would be rather inefficient.

Also large parts of the actions can be only usefully done in user space, so 
you need a user space component.

I am somewhat biased of course but I think mcelog is doing a reasonable
good job today at being this user space component. It definitely
has areas that could be improved too, but at lot of the basics
are there and doing ok.

In principle mcelog could feed from another API too, but it would
definitely prefer to not to have to poll it or having to parse
printks.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.
--
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Messages in current thread:
Hardware Error Kernel Mini-Summit, Mauro Carvalho Chehab, (Mon May 17, 11:23 am)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Mon May 17, 3:41 pm)
Re: Hardware Error Kernel Mini-Summit, Hidetoshi Seto, (Mon May 17, 11:52 pm)
Re: Hardware Error Kernel Mini-Summit, Borislav Petkov, (Tue May 18, 6:06 am)
Re: Hardware Error Kernel Mini-Summit, Mauro Carvalho Chehab, (Tue May 18, 9:44 am)
Re: Hardware Error Kernel Mini-Summit, Mauro Carvalho Chehab, (Tue May 18, 9:50 am)
Re: Hardware Error Kernel Mini-Summit, Mauro Carvalho Chehab, (Tue May 18, 9:52 am)
Re: Hardware Error Kernel Mini-Summit, Mauro Carvalho Chehab, (Tue May 18, 10:06 am)
Re: Hardware Error Kernel Mini-Summit, Joe Perches, (Tue May 18, 10:42 am)
Re: Hardware Error Kernel Mini-Summit, Mauro Carvalho Chehab, (Tue May 18, 10:59 am)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Tue May 18, 11:10 am)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Tue May 18, 11:45 am)
Re: Hardware Error Kernel Mini-Summit, Ingo Molnar, (Tue May 18, 11:53 am)
Re: Hardware Error Kernel Mini-Summit, Joe Perches, (Tue May 18, 11:57 am)
RE: Hardware Error Kernel Mini-Summit, Luck, Tony, (Tue May 18, 12:08 pm)
Re: Hardware Error Kernel Mini-Summit, Borislav Petkov, (Tue May 18, 12:18 pm)
Re: Hardware Error Kernel Mini-Summit, Ingo Molnar, (Tue May 18, 12:30 pm)
Re: Hardware Error Kernel Mini-Summit, Ingo Molnar, (Tue May 18, 12:34 pm)
Re: Hardware Error Kernel Mini-Summit, Ingo Molnar, (Tue May 18, 1:42 pm)
Re: Hardware Error Kernel Mini-Summit, Tony Luck, (Tue May 18, 2:37 pm)
Re: Hardware Error Kernel Mini-Summit, Ingo Molnar, (Tue May 18, 3:00 pm)
Re: Hardware Error Kernel Mini-Summit, Eric W. Biederman, (Tue May 18, 3:14 pm)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Tue May 18, 3:28 pm)
Re: Hardware Error Kernel Mini-Summit, Ingo Molnar, (Tue May 18, 3:29 pm)
Re: Hardware Error Kernel Mini-Summit, Eric W. Biederman, (Tue May 18, 6:14 pm)
Re: Hardware Error Kernel Mini-Summit, Ingo Molnar, (Tue May 18, 11:39 pm)
Re: Hardware Error Kernel Mini-Summit, Borislav Petkov, (Tue May 18, 11:46 pm)
Re: Hardware Error Kernel Mini-Summit, Ingo Molnar, (Wed May 19, 12:09 am)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Wed May 19, 2:03 am)
Re: Hardware Error Kernel Mini-Summit, Mauro Carvalho Chehab, (Wed May 19, 4:54 am)
Re: Hardware Error Kernel Mini-Summit, Tony Luck, (Wed May 19, 10:30 am)
Re: Hardware Error Kernel Mini-Summit, Ingo Molnar, (Thu May 20, 5:37 am)
Re: Hardware Error Kernel Mini-Summit, Russ Anderson, (Mon May 24, 8:55 am)
Re: Hardware Error Kernel Mini-Summit, Russ Anderson, (Mon May 24, 9:21 am)
Re: Hardware Error Kernel Mini-Summit, Russ Anderson, (Mon May 24, 10:13 am)
Re: Hardware Error Kernel Mini-Summit, Tony Luck, (Mon May 24, 10:35 am)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Mon May 24, 11:26 am)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Mon May 24, 11:31 am)
Re: Hardware Error Kernel Mini-Summit, Nils Carlson, (Mon Jun 14, 3:03 am)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Mon Jun 14, 4:49 am)
Re: Hardware Error Kernel Mini-Summit, Nils Carlson, (Mon Jun 14, 12:47 pm)
Re: Hardware Error Kernel Mini-Summit, Eric W. Biederman, (Mon Jun 14, 1:06 pm)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Mon Jun 14, 1:21 pm)
RE: Hardware Error Kernel Mini-Summit, Luck, Tony, (Mon Jun 14, 1:21 pm)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Mon Jun 14, 1:36 pm)
Re: Hardware Error Kernel Mini-Summit, Tony Luck, (Mon Jun 14, 2:34 pm)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Mon Jun 14, 11:44 pm)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Mon Jun 14, 11:56 pm)
Re: Hardware Error Kernel Mini-Summit, Nils Carlson, (Tue Jun 15, 1:06 am)
Re: Hardware Error Kernel Mini-Summit, Borislav Petkov, (Tue Jun 15, 3:01 am)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Tue Jun 15, 4:41 am)
Re: Hardware Error Kernel Mini-Summit, Nils Carlson, (Tue Jun 15, 5:21 am)
RE: Hardware Error Kernel Mini-Summit, Luck, Tony, (Tue Jun 15, 11:15 am)
Re: Hardware Error Kernel Mini-Summit, Nils Carlson, (Tue Jun 15, 11:38 am)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Tue Jun 15, 12:35 pm)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Tue Jun 15, 12:37 pm)
Re: Hardware Error Kernel Mini-Summit, Nils Carlson, (Tue Jun 15, 1:48 pm)
Re: Hardware Error Kernel Mini-Summit, Tony Luck, (Tue Jun 15, 3:33 pm)
Re: Hardware Error Kernel Mini-Summit, Andi Kleen, (Wed Jun 16, 2:40 am)