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CONFIG_BOOTPARAM_LOCKDEP_CROSSRELEASE_FULLSTACK: Enable the boot parameter, crossrelease_fullstack

General informations

The Linux kernel configuration item CONFIG_BOOTPARAM_LOCKDEP_CROSSRELEASE_FULLSTACK:

• prompt: Enable the boot parameter, crossrelease_fullstack
• type: bool
• depends on: CONFIG_LOCKDEP_CROSSRELEASE
• defined in lib/Kconfig.debug
• found in Linux kernels: 4.15-rc+HEAD

Help text

The lockdep "cross-release" feature needs to record stack traces (of calling functions) for all acquisitions, for eventual later use during analysis. By default only a single caller is recorded, because the unwind operation can be very expensive with deeper stack chains.

However a boot parameter, crossrelease_fullstack, was introduced since sometimes deeper traces are required for full analysis. This option turns on the boot parameter.

Hardware

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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