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reserve_user_space(): mutual exclusion on mmap

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This commit is contained in:
Balazs Gerofi
2017-01-24 12:38:59 +09:00
parent 1bc3218fc1
commit ad214c8206
3 changed files with 6 additions and 0 deletions
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4
executer/kernel/mcctrl/arch/x86_64/archdeps.c
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@ -64,6 +64,8 @@ reserve_user_space(struct mcctrl_usrdata *usrdata, unsigned long *startp, unsign
unsigned long start = 0L;
unsigned long end;
mutex_lock(&usrdata->reserve_lock);
#define DESIRED_USER_END 0x800000000000
#define GAP_FOR_MCEXEC 0x008000000000UL
end = DESIRED_USER_END;
@ -81,6 +83,8 @@ reserve_user_space(struct mcctrl_usrdata *usrdata, unsigned long *startp, unsign
up_write(&current->mm->mmap_sem);
#endif
mutex_unlock(&usrdata->reserve_lock);
if (IS_ERR_VALUE(start)) {
return start;
}

1
executer/kernel/mcctrl/ikc.c
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@ -289,6 +289,7 @@ int prepare_ikc_channels(ihk_os_t os)
memcpy(&usrdata->listen_param2, &listen_param2, sizeof listen_param2);
ihk_ikc_listen_port(os, &usrdata->listen_param2);
init_waitqueue_head(&usrdata->wq_procfs);
mutex_init(&usrdata->reserve_lock);
for (i = 0; i < MCCTRL_PER_PROC_DATA_HASH_SIZE; ++i) {
INIT_LIST_HEAD(&usrdata->per_proc_data_hash[i]);

1
executer/kernel/mcctrl/mcctrl.h
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@ -283,6 +283,7 @@ struct mcctrl_usrdata {
int base_cpu;
int job_pos;
int mcctrl_dma_abort;
struct mutex reserve_lock;
unsigned long last_thread_exec;
wait_queue_head_t wq_procfs;
struct list_head per_proc_data_hash[MCCTRL_PER_PROC_DATA_HASH_SIZE];