On Tue, Nov 12, 2019 at 3:22 PM Stefan Haberland <[email protected]> wrote: > > On 11.11.19 09:36, Christian Ehrhardt wrote: > > On Fri, Nov 8, 2019 at 5:18 PM van Sleeuwen, Berry > > <[email protected]> wrote: > >> 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. > > Thanks Stefan, > > yeah [1] really looks good in regard to the issue described here. > > This fix is indeed in newer kernels like the 4.18 HWE kernel, but btw > > the most recent HWE kernel for 18.04 is even already at 5.0.0.34.91. > > Anyway, this won't help the defaults, as you can see on [2] that for > > compatibility reasons "Server installations will default to the GA > > kernel and provide the enablement kernel as optional." > > So without users like Berry explicitly opting into the new kernel they > > won't get the fix. > > > > Given that this issue potentially affects the install when enabling > > plenty of disks I wonder if the change should be backported to an > > update of the GA kernel into a 4.15-0-xx release. > > > > @Stefan you are the Author and the patch looks rather small and > > backportable. Also for potential regressions of that default change > > [1] states that there were none of the expected performance > > regressions happening. > > What would be your opinion, should we open a bug and ask the Kernel > > team to consider backporting this into Ubuntu's 4.15 kernel as well? > > Hi Christian, > > from my point of view it should be no problem to port this patch to > 4.15. But I can run some additional tests on it if you like.
Thanks Stefan! This already became [1]. Additional tests (whatever you usually use to qualify dasds) will be fine when this switches to be in a proposed kernel. There will be an update to the bug once it is ready, so if you subscribe there that would be great to run the tests on that then. [1]: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1852257 > Regards, > Stefan > > ---------------------------------------------------------------------- > 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 -- Christian Ehrhardt Staff Engineer, Ubuntu Server Canonical Ltd ---------------------------------------------------------------------- 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
