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s390/topology: fix core id vs physical package id mix-up 

The current topology code confuses core id vs physical package id.

In other words /sys/devices/system/cpu/cpuX/topology/core_id
displays the physical_package_id (aka socket id) instead of the
core id.
The physical_package_id sysfs attribute always displays "-1"
instead of the socket id.

Fix this mix-up with a small patch which defines and initializes
topology_physical_package_id correctly and fixes the broken
core id handling.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2012-11-10 11:04:27 +01:00 committed by Martin Schwidefsky
parent fa968ee215
commit 658e5ce705
2 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/s390/include/asm/topology.h
View File

@ -8,6 +8,9 @@ struct cpu;
#ifdef CONFIG_SCHED_BOOK
extern unsigned char cpu_socket_id[NR_CPUS];
#define topology_physical_package_id(cpu) (cpu_socket_id[cpu])
extern unsigned char cpu_core_id[NR_CPUS];
extern cpumask_t cpu_core_map[NR_CPUS];

6
arch/s390/kernel/topology.c
View File

@ -40,6 +40,7 @@ static DEFINE_SPINLOCK(topology_lock);
static struct mask_info core_info;
cpumask_t cpu_core_map[NR_CPUS];
unsigned char cpu_core_id[NR_CPUS];
unsigned char cpu_socket_id[NR_CPUS];
static struct mask_info book_info;
cpumask_t cpu_book_map[NR_CPUS];
@ -83,11 +84,12 @@ static struct mask_info *add_cpus_to_mask(struct topology_cpu *tl_cpu,
cpumask_set_cpu(lcpu, &book->mask);
cpu_book_id[lcpu] = book->id;
cpumask_set_cpu(lcpu, &core->mask);
cpu_core_id[lcpu] = rcpu;
if (one_core_per_cpu) {
cpu_core_id[lcpu] = rcpu;
cpu_socket_id[lcpu] = rcpu;
core = core->next;
} else {
cpu_core_id[lcpu] = core->id;
cpu_socket_id[lcpu] = core->id;
}
smp_cpu_set_polarization(lcpu, tl_cpu->pp);
}