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do_mmap(): indicate user level allocations for anonymous mappings

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This commit is contained in:
Balazs Gerofi
2016-12-31 10:09:49 +09:00
parent 40d75baca2
commit 4437ecc69a
2 changed files with 11 additions and 2 deletions
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8
kernel/syscall.c
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@@ -1252,12 +1252,14 @@ do_mmap(const intptr_t addr0, const size_t len0, const int prot,
populated_mapping = 1;
}
#if 0
/* XXX: Intel MPI 128MB mapping.. */
if (len == 134217728) {
kprintf("%s: 128MB mapping -> no prefault\n",
__FUNCTION__, len);
populated_mapping = 0;
}
#endif
if (!(prot & PROT_WRITE)) {
error = set_host_vma(addr, len, PROT_READ);
@@ -1317,8 +1319,12 @@ do_mmap(const intptr_t addr0, const size_t len0, const int prot,
else if (!(vrflags & VR_DEMAND_PAGING)
&& ((vrflags & VR_PROT_MASK) != VR_PROT_NONE)) {
npages = len >> PAGE_SHIFT;
/* Small allocations mostly benefit from closest RAM,
* otherwise follow user requested policy */
unsigned long __flag = (len >= 1048576) ? IHK_MC_AP_USER : 0;
p = ihk_mc_alloc_aligned_pages(npages, p2align, IHK_MC_AP_NOWAIT);
p = ihk_mc_alloc_aligned_pages(npages, p2align,
IHK_MC_AP_NOWAIT | __flag);
if (p == NULL) {
ekprintf("%s: warning: failed to allocate %d contiguous pages"
" (pgshift: %d), enabling demand paging\n",