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Diffstat (limited to 'releasenotes/notes/remove-nomodset-7a352a9519c1045b.yaml')
| -rw-r--r-- | releasenotes/notes/remove-nomodset-7a352a9519c1045b.yaml | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/releasenotes/notes/remove-nomodset-7a352a9519c1045b.yaml b/releasenotes/notes/remove-nomodset-7a352a9519c1045b.yaml new file mode 100644 index 000000000..26d10c262 --- /dev/null +++ b/releasenotes/notes/remove-nomodset-7a352a9519c1045b.yaml @@ -0,0 +1,22 @@ +--- +upgrade: + - | + The defaults for ``kernel_append_params`` have had the Linux kernel + command line parameter ``nomodeset`` removed from the defaults for the + ``kernel_append_params`` settings. The ``nomodeset`` option is for + troubleshooting and changes the behavior of the graphics interface + such that memory can be locked upon graphical updates on physical + servers with BMC graphical interfaces, which results in spikes in + latency and packet loss whenever graphics updates occur. Operators + may add the option to their local configuration, but should be aware + that large image transfers or other high IO operations can be impacted. +fixes: + - | + Agents deploying on physical servers with default kernel arguments were + suspetible to packet loss if a Matrox VGA/Aspeed BMC Graphics interface + is present on the machine. The defaults have been changed to remove + the use of the ``nomodeset`` kernel command line parameter which + should only be used for troubleshooting as it has been determined + that the memory updates can lock all of the kernel memory upon any + console graphics update which can negatively impact IO for Networking + or Disk interactions. |