Hi Rob
Is it possible to just down load the kernel patch for this and not all the
extra packages
that you get when you request an update?
Thank you
David Kelly
The Supreme Court of Virginia
Rob van der Heij
<rvdh...@velocity
software.com> To
Sent by: Linux on LINUX-390@VM.MARIST.EDU
390 Port cc
<linux-...@vm.mar
IST.EDU> Subject
Re: High interrupt rate
05/28/2009 01:48
PM
Please respond to
Linux on 390 Port
<linux-...@vm.mar
IST.EDU>
On Thu, May 28, 2009 at 5:12 PM, Deric Abel <da...@americafirst.com> wrote:
> We are running sles10 sp2 not redhat, so I am not sure if this bug was in
any of the red hat releases. The kernel that comes with sp2 was
2.6.16.60-0.21, and the most recent kernel for sp2 is
2.6.16.60-0.37 (remember that the number after the "-" is the rpm
build/release version, so that will be different between distros). I am
not sure want the underlying problem was, but from this mailing list it
seems there was a bug in the sles10sp2 kernel and it's fixed with the
newest. So unless someone else would like to explain the bug, that's all
the information I have.
The cause is that the application asks for a wakeup in 1 ms or so
(this is silly design since it is polling). The kernel only provides
10 ms granularity and rounded incorrectly to 0 ms, thus making the
silly thing pretty bad. It also shows very high CP overhead when this
happens.
The fix is that the kernel rounds it to 10 ms to limit the impact.
Martin just told me the fix is in: 2.6.18-124.el5 für RedHat RHEL5 und
2.6.16.60-0.34 für SuSE SLES10
--
Rob van der Heij
Velocity Software
http://www.velocitysoftware.com/
----------------------------------------------------------------------
For LINUX-390 subscribe / signoff / archive access instructions,
send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or
visit
http://www.marist.edu/htbin/wlvindex?LINUX-390
----------------------------------------------------------------------
For LINUX-390 subscribe / signoff / archive access instructions,
send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit
http://www.marist.edu/htbin/wlvindex?LINUX-390
