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Revert "brk(): larger allocation units internally"

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This reverts commit c58ab0f648.
This commit is contained in:
Balazs Gerofi
2016-12-20 11:11:09 +09:00
parent 701cdcdab1
commit f81927b85b
4 changed files with 94 additions and 50 deletions
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97
kernel/process.c
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@ -1953,8 +1953,8 @@ int init_process_stack(struct thread *thread, struct program_load_desc *pn,
unsigned long extend_process_region(struct process_vm *vm,
unsigned long start, unsigned long end,
unsigned long address, unsigned long flag)
unsigned long start, unsigned long end,
unsigned long address, unsigned long flag)
{
unsigned long aligned_end, aligned_new_end;
void *p;
@ -1965,32 +1965,93 @@ unsigned long extend_process_region(struct process_vm *vm,
}
aligned_end = ((end + PAGE_SIZE - 1) & PAGE_MASK);
if (aligned_end >= address) {
return address;
}
aligned_new_end = (address + PAGE_SIZE - 1) & PAGE_MASK;
if (flag & VR_DEMAND_PAGING) {
// demand paging no need to allocate page now
kprintf("%s: demand paging, no physical memory allocated\n",
__FUNCTION__);
p = 0;
}
else {
p = ihk_mc_alloc_pages((aligned_new_end - aligned_end) >> PAGE_SHIFT,
IHK_MC_AP_NOWAIT);
#ifdef USE_LARGE_PAGES
if (aligned_new_end - aligned_end >= LARGE_PAGE_SIZE) {
if(flag & VR_DEMAND_PAGING){panic("demand paging for large page is not available!");}
unsigned long p_aligned;
unsigned long old_aligned_end = aligned_end;
if (!p) {
if ((aligned_end & (LARGE_PAGE_SIZE - 1)) != 0) {
aligned_end = (aligned_end + (LARGE_PAGE_SIZE - 1)) & LARGE_PAGE_MASK;
/* Fill in the gap between old_aligned_end and aligned_end
* with regular pages */
if((p = ihk_mc_alloc_pages((aligned_end - old_aligned_end) >> PAGE_SHIFT,
IHK_MC_AP_NOWAIT)) == NULL){
return end;
}
if((rc = add_process_memory_range(vm, old_aligned_end,
aligned_end, virt_to_phys(p), flag,
LARGE_PAGE_SHIFT)) != 0){
ihk_mc_free_pages(p, (aligned_end - old_aligned_end) >> PAGE_SHIFT);
return end;
}
dkprintf("filled in gap for LARGE_PAGE_SIZE aligned start: 0x%lX -> 0x%lX\n",
old_aligned_end, aligned_end);
}
/* Add large region for the actual mapping */
aligned_new_end = (aligned_new_end + (aligned_end - old_aligned_end) +
(LARGE_PAGE_SIZE - 1)) & LARGE_PAGE_MASK;
address = aligned_new_end;
if((p = ihk_mc_alloc_pages((aligned_new_end - aligned_end + LARGE_PAGE_SIZE) >> PAGE_SHIFT,
IHK_MC_AP_NOWAIT)) == NULL){
return end;
}
}
if ((rc = add_process_memory_range(vm, aligned_end, aligned_new_end,
(p == 0 ? 0 : virt_to_phys(p)), flag, NULL, 0,
PAGE_SHIFT)) != 0) {
p_aligned = ((unsigned long)p + (LARGE_PAGE_SIZE - 1)) & LARGE_PAGE_MASK;
if (p_aligned > (unsigned long)p) {
ihk_mc_free_pages(p, (p_aligned - (unsigned long)p) >> PAGE_SHIFT);
}
ihk_mc_free_pages(
(void *)(p_aligned + aligned_new_end - aligned_end),
(LARGE_PAGE_SIZE - (p_aligned - (unsigned long)p)) >> PAGE_SHIFT);
if((rc = add_process_memory_range(vm, aligned_end,
aligned_new_end, virt_to_phys((void *)p_aligned),
flag, LARGE_PAGE_SHIFT)) != 0){
ihk_mc_free_pages(p, (aligned_new_end - aligned_end + LARGE_PAGE_SIZE) >> PAGE_SHIFT);
return end;
}
dkprintf("largePTE area: 0x%lX - 0x%lX (s: %lu) -> 0x%lX - \n",
aligned_end, aligned_new_end,
(aligned_new_end - aligned_end),
virt_to_phys((void *)p_aligned));
return address;
}
#endif
if(flag & VR_DEMAND_PAGING){
// demand paging no need to allocate page now
kprintf("demand page do not allocate page\n");
p=0;
}else{
p = ihk_mc_alloc_pages((aligned_new_end - aligned_end) >> PAGE_SHIFT, IHK_MC_AP_NOWAIT);
if (!p) {
return end;
}
}
if((rc = add_process_memory_range(vm, aligned_end, aligned_new_end,
(p==0?0:virt_to_phys(p)), flag, NULL, 0,
PAGE_SHIFT)) != 0){
ihk_mc_free_pages(p, (aligned_new_end - aligned_end) >> PAGE_SHIFT);
return end;
}
/* NOTE: returned value is not the user requested new end! */
return aligned_new_end;
return address;
}
// Original version retained because dcfa (src/mccmd/client/ibmic/main.c) calls this