lkml.org 
[lkml]   [2020]   [Sep]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] Only allow to set crash_kexec_post_notifiers on boot time
On Fri, 18 Sep 2020 11:25:46 +0800 Dave Young <dyoung@redhat.com> wrote:

> crash_kexec_post_notifiers enables running various panic notifier
> before kdump kernel booting. This increases risks of kdump failure.
> It is well documented in kernel-parameters.txt. We do not suggest
> people to enable it together with kdump unless he/she is really sure.
> This is also not suggested to be enabled by default when users are
> not aware in distributions.
>
> But unfortunately it is enabled by default in systemd, see below
> discussions in a systemd report, we can not convince systemd to change
> it:
> https://github.com/systemd/systemd/issues/16661
>
> Actually we have got reports about kdump kernel hangs in both s390x
> and powerpcle cases caused by the systemd change, also some x86 cases
> could also be caused by the same (although that is in Hyper-V code
> instead of systemd, that need to be addressed separately).
>
> Thus to avoid the auto enablement here just disable the param writable
> permission in sysfs.
>

Well. I don't think this is at all a desirable way of resolving a
disagreement with the systemd developers

At the above github address I'm seeing "ryncsn added a commit to
ryncsn/systemd that referenced this issue 9 days ago", "pstore: don't
enable crash_kexec_post_notifiers by default". So didn't that address
the issue?

\
 
 \ /
  Last update: 2020-09-19 02:49    [W:0.088 / U:1.476 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site