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force allow_oversubscribe (workaround for Fugaku)

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Change-Id: I5288f5ccbd967004fabbe71bca267feed3b9c2f8
This commit is contained in:
Masamichi Takagi
2020-06-12 11:58:46 +09:00
parent 4512778569
commit dea7d00545
1 changed files with 6 additions and 0 deletions
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6
kernel/syscall.c
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@ -1751,6 +1751,7 @@ do_mmap(const uintptr_t addr0, const size_t len0, const int prot,
populated_mapping = 1;
}
#if 0
/* XXX: Intel MPI 128MB mapping.. */
if (len == 134217728) {
dkprintf("%s: %ld bytes mapping -> no prefault\n",
@ -1758,6 +1759,7 @@ do_mmap(const uintptr_t addr0, const size_t len0, const int prot,
vrflags |= VR_DEMAND_PAGING;
populated_mapping = 0;
}
#endif
if ((flags & MAP_ANONYMOUS) && !(prot & PROT_WRITE)) {
error = set_host_vma(addr, len, PROT_READ | PROT_EXEC, 1/* holding memory_range_lock */);
@ -2751,7 +2753,9 @@ unsigned long do_fork(int clone_flags, unsigned long newsp,
struct syscall_request request1 IHK_DMA_ALIGN;
int ptrace_event = 0;
int termsig = clone_flags & 0x000000ff;
#if 0
const struct ihk_mc_cpu_info *cpu_info = ihk_mc_get_cpu_info();
#endif
int err = 0;
dkprintf("%s,flags=%08x,newsp=%lx,ptidptr=%lx,"
@ -2794,10 +2798,12 @@ unsigned long do_fork(int clone_flags, unsigned long newsp,
return -EINVAL;
}
#if 0
if (!allow_oversubscribe && rusage.num_threads >= cpu_info->ncpus) {
kprintf("%s: ERROR: CPU oversubscription is not allowed. Specify -O option in mcreboot.sh to allow it.\n", __FUNCTION__);
return -EINVAL;
}
#endif
if (oldproc->coredump_barrier_count) {
return -EINVAL;