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add ihk_mc_allocate_aligned_pages()

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NAKAMURA Gou
2013-07-10 12:52:46 +09:00
parent 63d97642d5
commit 630170fb6a
6 changed files with 44 additions and 18 deletions
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17
lib/page_alloc.c
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@ -88,13 +88,14 @@ void ihk_pagealloc_destroy(void *__desc)
}
static unsigned long __ihk_pagealloc_large(struct ihk_page_allocator_desc *desc,
int npages)
int npages, int p2align)
{
unsigned long flags;
unsigned int i, j, mi;
int nblocks;
int nfrags;
unsigned long mask;
int mialign;
nblocks = (npages / 64);
mask = -1;
@ -103,13 +104,14 @@ static unsigned long __ihk_pagealloc_large(struct ihk_page_allocator_desc *desc,
++nblocks;
mask = (1UL << nfrags) - 1;
}
mialign = (p2align <= 6)? 1: (1 << (p2align - 6));
flags = ihk_mc_spinlock_lock(&desc->lock);
for (i = 0, mi = desc->last; i < desc->count; i++, mi++) {
if (mi >= desc->count) {
mi = 0;
}
if (mi + nblocks >= desc->count) {
if ((mi + nblocks >= desc->count) || (mi % mialign)) {
continue;
}
for (j = mi; j < mi + nblocks - 1; j++) {
@ -131,18 +133,20 @@ static unsigned long __ihk_pagealloc_large(struct ihk_page_allocator_desc *desc,
return 0;
}
unsigned long ihk_pagealloc_alloc(void *__desc, int npages)
unsigned long ihk_pagealloc_alloc(void *__desc, int npages, int p2align)
{
struct ihk_page_allocator_desc *desc = __desc;
unsigned int i, mi;
int j;
unsigned long v, mask, flags;
int jalign;
if (npages >= 32) {
return __ihk_pagealloc_large(desc, npages);
if ((npages >= 32) || (p2align >= 5)) {
return __ihk_pagealloc_large(desc, npages, p2align);
}
mask = (1UL << npages) - 1;
jalign = (p2align <= 0)? 1: (1 << p2align);
flags = ihk_mc_spinlock_lock(&desc->lock);
for (i = 0, mi = desc->last; i < desc->count; i++, mi++) {
@ -155,6 +159,9 @@ unsigned long ihk_pagealloc_alloc(void *__desc, int npages)
continue;
for (j = 0; j <= 64 - npages; j++) {
if (j % jalign) {
continue;
}
if (!(v & (mask << j))) { /* free */
desc->map[mi] |= (mask << j);