linux-kernel - Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <47266BAB.2000406@linux.vnet.ibm.com>
Date:	Tue, 30 Oct 2007 04:54:27 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Frans Pop <elendil@...net.nl>
CC:	Ingo Molnar <mingo@...e.hu>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	Chuck Ebbert <cebbert@...hat.com>, Greg KH <greg@...ah.com>,
	stable@...nel.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [stable] 2.6.23 regression: top displaying 9999% CPU usage

Frans Pop wrote:
> On Monday 29 October 2007, Balbir Singh wrote:
>> We'll also need this additional patch (untested),
> 
> OK. Both patches together do the trick. Gave it a nice long test run and got 
> no more weirdness.
> Tested-by: Frans Pop <elendil@...net.nl>
> 

Thanks for testing it

Ingo, I think this fix needs to be picked as well.

>> but in the long run I think the approach needs to be
>>
>> 1. Update stime and utime at the time of context switching -- keep it
>>    in sync with p->sum_exec_runtime
>> 2. Keep track of system/user context at system call entry points
> 
> Feel free to send me a patch for testing when you have one.
> 

I hope to find some free time soon and get to it.

> Cheers,
> Frans


-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/