Hello everyone,
Some of you might remember discussions earlier in 2017 (huh, long time ago) on centos-virt list about Linux kernel tty/ldisc related bug, which caused Xen dom0 kernel crashes for some people (and also more easy to trigger crashes on other arches, like on hp pa-risc), but the bug was difficult to reproduce for others/most people.
Fix for this issue was merged to centos virt-sig Linux 4.9.48-29 kernel earlier in 2017, but reverted/deleted in 4.9.75-30 due to problems with the patch. The patch in question was also merged to upstream Linux kernel, and later reverted there aswell.
But now finally the issue has been resolved in upstream Linux, and the patches have been already backported to Linux 4.9.152 longterm stable kernel. Changelog: https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.152 You can find the tty/ldisc patches there.
So I propose we build the latest 4.9.155 kernel for CentOS virt-sig for centos6 and centos7.
Thanks,
-- Pasi