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mmap and fileobj: handle MF_ZEROFILL properly

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Change-Id: I6ee52b4cab212b1973339bc8d49065c1ec9263b0
This commit is contained in:
Balazs Gerofi
2019-09-17 14:05:31 +09:00
committed by Masamichi Takagi
parent d15a396d5a
commit c0c80b71ca
2 changed files with 30 additions and 23 deletions
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43
kernel/syscall.c
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@ -2001,28 +2001,33 @@ do_mmap(const uintptr_t addr0, const size_t len0, const int prot,
/* Update PTEs for pre-mapped memory object */
if ((memobj->flags & MF_PREMAP) &&
(proc->mpol_flags & MPOL_SHM_PREMAP)) {
int i;
enum ihk_mc_pt_attribute ptattr;
ptattr = arch_vrflag_to_ptattr(range->flag, PF_POPULATE, NULL);
if (memobj->flags & MF_ZEROFILL) {
int i;
enum ihk_mc_pt_attribute ptattr;
ptattr = arch_vrflag_to_ptattr(range->flag, PF_POPULATE, NULL);
for (i = 0; i < memobj->nr_pages; ++i) {
error = ihk_mc_pt_set_range(proc->vm->address_space->page_table,
proc->vm,
(void *)range->start + (i * PAGE_SIZE),
(void *)range->start + (i * PAGE_SIZE) +
PAGE_SIZE,
virt_to_phys(memobj->pages[i]),
ptattr,
PAGE_SHIFT,
range,
0);
if (error) {
kprintf("%s: ERROR: mapping %d page of pre-mapped file\n",
__FUNCTION__, i);
for (i = 0; i < memobj->nr_pages; ++i) {
error = ihk_mc_pt_set_range(proc->vm->address_space->page_table,
proc->vm,
(void *)range->start + (i * PAGE_SIZE),
(void *)range->start + (i * PAGE_SIZE) +
PAGE_SIZE,
virt_to_phys(memobj->pages[i]),
ptattr,
PAGE_SHIFT,
range,
0);
if (error) {
kprintf("%s: ERROR: mapping %d page of pre-mapped file\n",
__FUNCTION__, i);
}
}
dkprintf("%s: memobj 0x%lx pre-mapped\n", __FUNCTION__, memobj);
// fileobj && MF_PREMAP && MPOL_SHM_PREMAP case: memory_stat_rss_add() is called in fileobj_create()
}
else {
populated_mapping = 1;
}
dkprintf("%s: memobj 0x%lx pre-mapped\n", __FUNCTION__, memobj);
// fileobj && MF_PREMAP && MPOL_SHM_PREMAP case: memory_stat_rss_add() is called in fileobj_create()
}
/*
else if (memobj->flags & MF_REG_FILE) {