kgdb_roundup_cpus(9)
NAME
kgdb_roundup_cpus - Get other CPUs into a holding pattern
SYNOPSIS
void kgdb_roundup_cpus(unsigned long flags);
ARGUMENTS
- flags
- Current IRQ state
DESCRIPTION
On SMP systems, we need to get the attention of the other CPUs and get
them be in a known state. This should do what is needed to get the
other CPUs to call kgdb_wait. Note that on some arches, the NMI
approach is not used for rounding up all the CPUs. For example, in case
of MIPS, smp_call_function is used to roundup CPUs. In this case, we
have to make sure that interrupts are enabled before calling
smp_call_function. The argument to this function is the flags that will
be used when restoring the interrupts. There is local_irq_save call
before kgdb_roundup_cpus.
On non-SMP systems, this is not called.
AUTHORS
- Jason Wessel <jason.wessel@windriver.com>
- Author.
- Tom Rini <trini@kernel.crashing.org>
- Author.
- Amit S. Kale <amitkale@linsyssoft.com>
- Author.