CONFIG_TRACE_SYSCALL_BUF_SIZE_DEFAULT: System call user read max size

General informations

The Linux kernel configuration item CONFIG_TRACE_SYSCALL_BUF_SIZE_DEFAULT:

• prompt: System call user read max size
• type: int
• depends on: CONFIG_FTRACE_SYSCALLS
• defined in kernel/trace/Kconfig
• found in Linux kernels: 6.19-rc+HEAD

Help text

Some system call trace events will record the data from a user space address that one of the parameters point to. The amount of data per event is limited. That limit is set by this config and this config also affects how much user space data perf can read.

For a tracing instance, this size may be changed by writing into its syscall_user_buf_size file.

Hardware

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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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