diff options
| author | Breno Leitao <leitao@debian.org> | 2026-08-05 07:52:36 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2026-08-10 11:47:20 -1000 |
| commit | a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 (patch) | |
| tree | 39f5b258386e1127d253d293194e9a2991bf3c34 /arch/sh/Kconfig.debug | |
| download | linux-stable-a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656.tar.gz linux-stable-a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656.zip | |
workqueue: skip the node_nr_active update for non-unbound workqueuesgrafted
apply_wqattrs_commit() updates node_nr_active->max unconditionally.
wq->node_nr_active[] is only allocated for unbound workqueues, so guard
the call before per-cpu workqueues start using this path.
No functional change: only unbound workqueues reach apply_wqattrs_*()
today.
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch/sh/Kconfig.debug')
| -rw-r--r-- | arch/sh/Kconfig.debug | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug new file mode 100644 index 000000000..8bcd6c143 --- /dev/null +++ b/arch/sh/Kconfig.debug @@ -0,0 +1,89 @@ +# SPDX-License-Identifier: GPL-2.0 + +config SH_STANDARD_BIOS + bool "Use LinuxSH standard BIOS" + help + Say Y here if your target has the gdb-sh-stub + package from www.m17n.org (or any conforming standard LinuxSH BIOS) + in FLASH or EPROM. The kernel will use standard BIOS calls during + boot for various housekeeping tasks (including calls to read and + write characters to a system console, get a MAC address from an + on-board Ethernet interface, and shut down the hardware). Note this + does not work with machines with an existing operating system in + mask ROM and no flash (WindowsCE machines fall in this category). + If unsure, say N. + +config STACK_DEBUG + bool "Check for stack overflows" + depends on DEBUG_KERNEL && PRINTK + help + This option will cause messages to be printed if free stack space + drops below a certain limit. Saying Y here will add overhead to + every function call and will therefore incur a major + performance hit. Most users should say N. + +config EARLY_PRINTK + bool "Early printk" + depends on SH_STANDARD_BIOS + help + Say Y here to redirect kernel printk messages to the serial port + used by the SH-IPL bootloader, starting very early in the boot + process and ending when the kernel's serial console is initialised. + This option is only useful while porting the kernel to a new machine, + when the kernel may crash or hang before the serial console is + initialised. If unsure, say N. + +config 4KSTACKS + bool "Use 4Kb for kernel stacks instead of 8Kb" + depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB + help + If you say Y here the kernel will use a 4Kb stacksize for the + kernel stack attached to each process/thread. This facilitates + running more threads on a system and also reduces the pressure + on the VM subsystem for higher order allocations. This option + will also use IRQ stacks to compensate for the reduced stackspace. + +config IRQSTACKS + bool "Use separate kernel stacks when processing interrupts" + depends on DEBUG_KERNEL && BROKEN + help + If you say Y here the kernel will use separate kernel stacks + for handling hard and soft interrupts. This can help avoid + overflowing the process kernel stacks. + +config DUMP_CODE + bool "Show disassembly of nearby code in register dumps" + depends on DEBUG_KERNEL + default y if DEBUG_BUGVERBOSE + default n + help + This prints out a code trace of the instructions leading up to + the faulting instruction as a debugging aid. As this does grow + the kernel in size a bit, most users will want to say N here. + + Those looking for more verbose debugging output should say Y. + +config DWARF_UNWINDER + bool "Enable the DWARF unwinder for stacktraces" + depends on DEBUG_KERNEL + select FRAME_POINTER + default n + help + Enabling this option will make stacktraces more accurate, at + the cost of an increase in overall kernel size. + +config SH_NO_BSS_INIT + bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)" + depends on DEBUG_KERNEL + default n + help + If running in painfully slow environments, such as an RTL + simulation or from remote memory via SHdebug, where the memory + can already be guaranteed to ber zeroed on boot, say Y. + + For all other cases, say N. If this option seems perplexing, or + you aren't sure, say N. + +config MCOUNT + def_bool y + depends on STACK_DEBUG || FUNCTION_TRACER |
