kswapd

[Blackburn, Marvin]

Doesn't sound promising.
>From the Bugzilla reports, it seemed to fix some people.
We have trouble upgrading because of compatibility issues with EMC
powerpath.

EL4 is well into the future for us. 

> -----Original Message-----
> From: redhat-list-bounces at redhat.com 
> [mailto:redhat-list-bounces at redhat.com] On Behalf Of David Ernst
> Sent: Wednesday, February 16, 2005 2:58 PM
> To: General Red Hat Linux discussion list
> Subject: Re: kswapd
> 
> Sorry, I was throwing around numbers carelessly.  I'll be more
> clear...
> 
> http://rhn.redhat.com/errata/RHBA-2004-550.html   talks about the
> kswapd issue and recommends upgrading to package
> kernel-2.4.21-27.EL.  We actually didn't do this, because by the time
> we got around to it, the following had been released:
> 
> http://rhn.redhat.com/errata/RHSA-2004-689.html   doesn't talk about
> the kswapd issue, but recommends upgrading to kernel-2.4.21-27.0.1.EL
> for security reasons.  Naturally, I assumed that this would include
> the "kswapd" fix in kernel-2.4.21-27.EL.  In short we are presently
> running kernel-2.4.21-27.0.1.EL, and still have our problem.  
> 
> http://rhn.redhat.com/errata/RHSA-2005-043.html  is what references
> the kernel-2.4.21-27.0.2.EL package.  We had troubule with this
> upgrade and backed out.  The point of my comments before was that I
> don't have any reason to think upgrading to this version will help
> with our problem, because the errata that announces it (2005-043)
> doesn't say anything about our problem.  
> 
> In short, I still have no confidence that anything we can do inside
> EL3 will solve our problem.  This is why I'm tempted to try EL4... it
> seems possible that whatever is plaguing us with the 2.4 kernel won't
> do so under a 2.6 kernel.  Thoughts?
> 
> David
> 
> 
> 
> 
> 
> 
> 
> On Wed, Feb 16, 2005 at 08:28:01AM -0500, Blackburn, Marvin wrote:
> >David,
> >The previous erratta to RHSA-2005-043.html addresses the 
> kswapd issue.
> >What was that bugzilla number? 
> >
> >> -----Original Message-----
> >> From: redhat-list-bounces at redhat.com 
> >> [mailto:redhat-list-bounces at redhat.com] On Behalf Of David Ernst
> >> Sent: Tuesday, February 15, 2005 5:19 PM
> >> To: General Red Hat Linux discussion list
> >> Subject: Re: kswapd
> >> 
> >> We have a similar problem....  The only difference is we 
> don't notice
> >> our kswapd running high the way everyone on that bugzilla 
> talked about
> >> it.  Otherwise, it's just about identical... the (other) symptoms,
> >> what triggers the symptoms, etc.  
> >> 
> >> What's worse, we're running the 2.4.21-27.0.1.EL kernel.  I had
> >> trouble upgrading to the 2.4.21-27.0.2.EL kernel, so we're 
> not using
> >> it yet, but from the announcement at
> >> http://rhn.redhat.com/errata/RHSA-2005-043.html doesn't 
> suggest that
> >> it would address anything about this problem anyway.  
> Anyone else have
> >> similar experience?  
> >> 
> >> Does anyone know if this issue has ever been seen in 2.6.x 
> kernels?  I
> >> see that RedHat announced RHEL4 today (or at least that's 
> when I got
> >> the email) and perhaps we'll just upgrade to that rather 
> than continue
> >> to beat our heads against walls...
> >> 
> >> David
> >> 
> >> 
> >> 
> >> 
> >> 
> >> On Thu, Feb 10, 2005 at 08:00:53AM -0500, Blackburn, Marvin wrote:
> >> >We have this problem too.  It gets so bad that the system 
> locks up.
> >> >The trouble with the fix is that some of our applications are not
> >> >certified with
> >> >the kernel recommended.
> >> >
> >> >Its strange -- this problem always recurs two weeks to the 
> >> day after a
> >> >reboot. 
> >> >
> >> >> -----Original Message-----
> >> >> From: redhat-list-bounces at redhat.com 
> >> >> [mailto:redhat-list-bounces at redhat.com] On Behalf Of 
> Cian Cullinan
> >> >> Sent: Wednesday, February 09, 2005 5:04 AM
> >> >> To: General Red Hat Linux discussion list
> >> >> Subject: Re: kswapd
> >> >> 
> >> >> See 
> >> >> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=132639
> >> >> 
> >> >> It's a bug with kswapd. The report goes into a lot of 
> >> detail about the
> >> >> VM which went over my head, but the solution is to upgrade 
> >> your kernel
> >> >> to one with this fixed.
> >> >> 
> >> >> 
> >> >> On Tue, 8 Feb 2005 15:07:19 -0800, Bhupinder Singh 
> >> >> <bsingh at digev.com> wrote:
> >> >> > Hi all:
> >> >> > Very often, a process kswapd takes control of 100% or more 
> >> >> of CPU and
> >> >> > stays that way for quite some time. Anybody know what is 
> >> >> causing it and
> >> >> > how to fix it. Any help will be greatly appreciated.
> >> >> > Thanks.
> >> >> > Bhupinder
> >> >> > --
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> >> >> >
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