Hi Stefan, Thanks for this information. So an update looks like the first step.
After initial installation I updated with the most current ports-mirror. The current version is VERSION="18.04.3 LTS (Bionic Beaver)". Looking at it, indeed the kernel was updated to 4.15.0-66 after I got the repo available but there is also an 4.18.0-25 available in there. However this 4.18 version was not installed. Met vriendelijke groet/With kind regards/Mit freundlichen Grüßen, Berry van Sleeuwen Flight Forum 3000 5657 EW Eindhoven -----Original Message----- From: Linux on 390 Port <[email protected]> On Behalf Of Stefan Haberland Sent: Friday, November 08, 2019 4:11 PM To: [email protected] Subject: Re: Ubuntu 18-04 unable to add DASD On 07.11.19 15:55, van Sleeuwen, Berry wrote: > Hi All, > > I have installed an Ubuntu 19-04 but as it turns out the application requires > version 18-04. So I have installed a new 18-04 system. > > Next I tried to move the LVM from the 19-04 machine into the 18-04 machine. > But I can't get the disks online. The first few disks are fine but at a > certain point the server crashes. During "chccwdev -e" at some point all > memory is exhausted and I see a lot of CPU and IO. Eventually the OOM-killer > kicks in to kill various processes. The server is no longer responding and > only a reboot (force and xautolog) will get the server back online. > > Next I have added a new range of disks instead of reusing the old. > Unfortunately with the empty disks I got into the same situation. But > eventually, after formatting the disks one-by-one, I was able to get a new > filesystem available. Even during reboot the new filesystem is activated > without a problem. So it looks like for some reason the problem went away. > But when I add another filesystem the machine once again crashes during > activation of the disks. > > What could cause this to happen? I am reluctant to hand over this machine as > we might get into the same problem when we need to add additional disks. Hi Berry, what exact kernel version are we talking about? Unfortunately after start using blk-mq the DASD driver used a lot of memory for a single device due to a quite optimistic number of hardware queues and queue depth. This was significantly improved with commit 3284da34a87a ("s390/dasd: reduce the default queue depth and nr of hardware queues") which is available since kernel 4.18. This is should be available in Ubuntu 18.04.2 as far as I know. So if you are using 18.04(.1) with kernel 4.15 this might be a problem and I would suggest to upgrade to 18.04.2 with kernel 4.18 or later. Regards, Stefan > > Met vriendelijke groet/With kind regards/Mit freundlichen Grüßen, > Berry van Sleeuwen Flight Forum 3000 5657 EW Eindhoven . +31 (0)6 > 22564276 > [cid:[email protected]] > [cid:[email protected]] > > > This e-mail and the documents attached are confidential and intended solely > for the addressee; it may also be privileged. If you receive this e-mail in > error, please notify the sender immediately and destroy it. As its integrity > cannot be secured on the Internet, Atos' liability cannot be triggered for > the message content. Although the sender endeavours to maintain a computer > virus-free network, the sender does not warrant that this transmission is > virus-free and will not be liable for any damages resulting from any virus > transmitted. On all offers and agreements under which Atos Nederland B.V. > supplies goods and/or services of whatever nature, the Terms of Delivery from > Atos Nederland B.V. exclusively apply. The Terms of Delivery shall be > promptly submitted to you on your request. > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, send > email to [email protected] with the message: INFO LINUX-390 or > visit > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww2. > marist.edu%2Fhtbin%2Fwlvindex%3FLINUX-390&data=02%7C01%7CBerry.van > Sleeuwen%40atos.net%7C68ced5f4a45e4b49431e08d764629ccf%7C33440fc6b7c74 > 12cbb730e70b0198d5a%7C0%7C0%7C637088247009390912&sdata=uCd2TI3q4dd > Uvgd9whv1tXK%2Fe2rQhbWZx%2FC4ECYY5wE%3D&reserved=0 > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww2.marist.edu%2Fhtbin%2Fwlvindex%3FLINUX-390&data=02%7C01%7CBerry.vanSleeuwen%40atos.net%7C68ced5f4a45e4b49431e08d764629ccf%7C33440fc6b7c7412cbb730e70b0198d5a%7C0%7C0%7C637088247009400903&sdata=S7KAS2n6KL5JODu5NMPGm8kq4YttqiVmxIJBS0o%2FqZE%3D&reserved=0 This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, Atos’ liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted. On all offers and agreements under which Atos Nederland B.V. supplies goods and/or services of whatever nature, the Terms of Delivery from Atos Nederland B.V. exclusively apply. The Terms of Delivery shall be promptly submitted to you on your request. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www2.marist.edu/htbin/wlvindex?LINUX-390
