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move_pages_smp_handler(): more parallelization

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This commit is contained in:
Balazs Gerofi
2017-05-17 02:17:04 +09:00
parent 632611d78c
commit 35b36c2d33
1 changed files with 39 additions and 1 deletions
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40
kernel/syscall.c
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@@ -8178,7 +8178,7 @@ int move_pages_smp_handler(int cpu_index, int nr_cpus, void *arg)
break;
}
}
else if (nr_cpus >= 4) {
else if (nr_cpus >= 4 && nr_cpus < 8) {
switch (cpu_index) {
case 0:
memcpy(mpsr->virt_addr, mpsr->user_virt_addr,
@@ -8205,6 +8205,44 @@ int move_pages_smp_handler(int cpu_index, int nr_cpus, void *arg)
break;
}
}
else if (nr_cpus >= 8) {
switch (cpu_index) {
case 0:
memcpy(mpsr->virt_addr, mpsr->user_virt_addr,
sizeof(void *) * (count / 2));
break;
case 1:
memcpy(mpsr->virt_addr + (count / 2),
mpsr->user_virt_addr + (count / 2),
sizeof(void *) * (count / 2));
break;
case 2:
memcpy(mpsr->status, mpsr->user_status,
sizeof(int) * count);
break;
case 3:
memcpy(mpsr->nodes, mpsr->user_nodes,
sizeof(int) * count);
mpsr->nodes_ready = 1;
break;
case 4:
memset(mpsr->ptep, 0, sizeof(pte_t) * count);
break;
case 5:
memset(mpsr->status, 0, sizeof(int) * count);
break;
case 6:
memset(mpsr->nr_pages, 0, sizeof(int) * count);
break;
case 7:
memset(mpsr->dst_phys, 0,
sizeof(unsigned long) * count);
break;
default:
break;
}
}
while (!(volatile int)mpsr->nodes_ready) {
cpu_pause();