recommendations. This information helps you to make decisions about the patch, such as whether to install or remove a patch with a warning from the system.

The warning field

You can find patch warning information in the Warning field of a patch's patch details page or patch text file. This field exists only for patches that have a warning. The Warning field is the definitive source of information about a patch warning. The following screen shows part of the Warning field for patch PHKL_30065.

Warning: 04/01/22 - This Critical Warning has been issued by HP.

-PHKL_30065 introduced behavior that can cause a panic on systems configured with greater than 32 GB of device swap.

The behavior will occur only if all the following factors occur:

-The system is configured with more device swap than is

supported by the current value of the swchunk(5) tunable kernel parameter.

-The system has 2 or more swap devices.

-Pages are actually written to the non-primary swap device which exceeds the swchunk(5) supported limit.

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The Warning field contains the following information:

•The issue date of any warnings (year/month/day format)

•Whether the patch warning is critical or noncritical (see “Critical and noncritical warnings” (page 39))

•A description of the problem

•A suggested course of action for the problem might be provided

•A reference to a replacement patch might be provided

See “Finding information for a specific patch” (page 36) for a description of how you can access a patch details page and a patch text file.

Critical and noncritical warnings

Patch warnings are either critical or noncritical. You can find this information in the first line of the Warning field in the patch's patch details page or in the patch text file.

HP considers a patch warning to be critical if the patch causes or exposes a critical problem. Examples of critical patches include the following:

•System panic or hang

•Process abort, hang, or failure

•Data corruption

•Severe performance degradation

•Application-specific critical issues

HP considers a patch warning to be noncritical if the patch causes or exposes a noncritical problem. Noncritical problems are those other than the ones described previously. Examples of noncritical problems include the following:

•Extraneous debug, warning, or error messages

•Failure to address all documented issues

•Minor regressions in behavior

Patch warnings

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