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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2012-11-10 14:04:27 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-11-12 19:24:38 +0400 |
| commit | 658e5ce705f2a09ab681eb61ca7c8619bb7a783d (patch) | |
| tree | d97179ea3d442bb6acb9e4db36c8235f24a1f0b5 /arch/s390 | |
| parent | fa968ee215c0ca91e4a9c3a69ac2405aae6e5d2f (diff) | |
| download | linux-658e5ce705f2a09ab681eb61ca7c8619bb7a783d.tar.xz | |
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>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/topology.h | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/topology.c | 6 |
2 files changed, 7 insertions, 2 deletions
diff --git a/arch/s390/include/asm/topology.h b/arch/s390/include/asm/topology.h index 9ca305383760..9935cbd6a46f 100644 --- a/arch/s390/include/asm/topology.h +++ b/arch/s390/include/asm/topology.h @@ -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]; diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c index 54d93f4b6818..dd55f7c20104 100644 --- a/arch/s390/kernel/topology.c +++ b/arch/s390/kernel/topology.c @@ -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); } |