CONFIG_RISCV_ISA_V_PREEMPTIVE: Run kernel-mode Vector with kernel preemption

General informations

The Linux kernel configuration item CONFIG_RISCV_ISA_V_PREEMPTIVE:

• prompt: Run kernel-mode Vector with kernel preemption
• type: bool
• depends on: ( CONFIG_PREEMPTION ) && ( CONFIG_RISCV_ISA_V )
• defined in arch/riscv/Kconfig
• found in Linux kernels: 6.8–6.12, 6.13-rc+HEAD

Help text

Usually, in-kernel SIMD routines are run with preemption disabled. Functions which envoke long running SIMD thus must yield core's vector unit to prevent blocking other tasks for too long.

This config allows kernel to run SIMD without explicitly disable preemption. Enabling this config will result in higher memory consumption due to the allocation of per-task's kernel Vector context.

Hardware

LKDDb

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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