On Wednesday, 07/17/2002 at 11:16 ZE2, Elisabeth Terseur <[EMAIL PROTECTED]> wrote: > Ok, I resume: > I'm testing installation of different distributions of Linux on top > of a zVM 4.2: > -SuSE Linux for S/390 version 7.2 running the 2.4.7 kernel > -RedHat Linux for S/390 version 7.2 running the 2.4.9 kernel > > I'm using NFS installation mode through an OSA Gigabit card > (NB by the way, the NFS server is sharing the OSA card with the Linux > images) > -at first level of VM: no specific problem > -at second level of VM (Linux is a guest of a VM guest): > .installation of SuSE works fine, but with poorer performances > than at first level > .installation of RedHat: fails in most (> 95%) of the cases, > due to VERY VERY poor rate of the OSA card > > I've tried to use an OSA Fast Ethernet card, with same result for RedHat > install.... I really suspect I did someting wrong on VM side.... > which lead RedHat not to behave as well as SuSE... > But what? > > Any kind of advice, somebody?
It was already posted by someone else that running Linux on a 2nd level system will be painfully slow. It may be that Red Hat has some sort of timeout that SuSE doesn't have. You could try giving more CPU SHARE to the 2nd level VM system in order to give 3rd level Linux the cycles it needs. 1st level gives 2nd level a fraction of the real CPU. That fraction is being further divided among your 3rd level guests. Alan Altmark Sr. Software Engineer IBM z/VM Development
