NFS mount causing kernel to be rebuilt

[Gary Cooper_1]

I'm just rebuilding a b2600 using September 2005 TCOE CDs.

The 4 CDs have gone in and the system has rebooted. I'm trying to create an NFS mount so that I can get to the server housing all of my patch bundles and when I exit the NFS mount area of sam, it tells me that my kernel has changed and do I want to create a new kernel!
(shmmax changed from 2147483648 to 1073741824)

I've never heard of this before - has anyone else?

Cheers,

Gary

[Gary Cooper_1]

Its now done the same when I try to mount the Patch Bundles CD!!!

Should I let it reuild the kernel?

Thanks,

Gary

[V. Nyga]

Hi,

never seen it myself, but there should be no problems to let the system create the new kernel. If the configuration of NFS needs this parameter changed, you should do so.
I never had problems with kernel creation.

HTH
Volkmar

[Peter Godron]

Gary,
hasn't happen to me either, however have you by chance installed a 32-bit version ?
How much RAM is on the machine ? I THINK shmmax can not be greater than swap ?

Reducing the shared memory per process is ok as long as each process has sufficient resource to run.

[Gary Cooper_1]

Peter,

The only options offered during the installation were 64-bit OS's.

The machine has 512Mb RAM and 1Gb swap.

Cheers,

Gary

[Peter Godron · Accepted solution]

Gary,
thanks for this.
Swap is 1GB, therfore shmmax is 1Gb

See:
http://docs.hp.com/en/939/KCParms/KCparam.ShMmax.html

Extend Swap and you should be able to increase shmmax.

I asked about the 32bit, as this could also have been the problem.

[Gary Cooper_1]

Peter,

The link that you gave seems to hit the nail on the head. The strange thing is that my other B2600s all have 1Gb swap and have shmmax set to 2147483648. They are all slightly older builds and I guess that maybe previous versions of sam didn't perform that check (or maybe didn't do it properly).

Cheers,

Gary