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cpuplugd/cpu: Rework CPU management functions

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Simplify the cpu management parts of cpuplugd code by introducing
functions from libutil and rework some logic to drop some assumptions
about how kernel assigns cpuids.
Right now cpuplugd assumes that the cpuids are always sequential and
there are no gaps in between, however kernel does not guarantee that.
Make cpuplugd compliant by traversing cpu sysfs entries instead.

Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Signed-off-by: Mete Durlu <meted@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Mete Durlu
2024-05-23 10:51:15 +02:00
committed by Jan Höppner
parent 0e4992da3a
commit c91d172c99
5 changed files with 195 additions and 224 deletions
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9
cpuplugd/cpuplugd.h
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@@ -23,6 +23,9 @@
#include <unistd.h>
#include "lib/util_base.h"
#include "lib/util_path.h"
#include "lib/util_file.h"
#include "lib/util_scandir.h"
#include "lib/zt_common.h"
#define NAME "cpuplugd"
@@ -190,9 +193,8 @@ void proc_cpu_read(char *procinfo);
unsigned long proc_read_size(char *path);
char *get_var_rvalue(char *var_name);
void cleanup_cmm(void);
int hotplug(int cpuid);
int hotunplug(int cpuid);
int is_online(int cpuid);
int hotplug_one_cpu(void);
int hotunplug_one_cpu(void);
long get_cmmpages_size();
void parse_options(int argc, char **argv);
void check_if_started_twice();
@@ -204,7 +206,6 @@ int check_cmmfiles(void);
void check_config();
void set_cmm_pages(long size);
int check_lpar();
int cpu_is_configured(int cpuid);
void setup_history(void);