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https://github.com/FEX-Emu/linux.git
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memblock: Factor the lowest level alloc function
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
parent
35a1f0bd07
commit
c3f72b5706
@ -294,8 +294,8 @@ static u64 memblock_align_up(u64 addr, u64 size)
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return (addr + (size - 1)) & ~(size - 1);
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}
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static u64 __init memblock_alloc_nid_unreserved(u64 start, u64 end,
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u64 size, u64 align)
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static u64 __init memblock_alloc_region(u64 start, u64 end,
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u64 size, u64 align)
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{
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u64 base, res_base;
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long j;
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@ -318,6 +318,13 @@ static u64 __init memblock_alloc_nid_unreserved(u64 start, u64 end,
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return ~(u64)0;
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}
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u64 __weak __init memblock_nid_range(u64 start, u64 end, int *nid)
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{
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*nid = 0;
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return end;
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}
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static u64 __init memblock_alloc_nid_region(struct memblock_region *mp,
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u64 size, u64 align, int nid)
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{
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@ -333,8 +340,7 @@ static u64 __init memblock_alloc_nid_region(struct memblock_region *mp,
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this_end = memblock_nid_range(start, end, &this_nid);
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if (this_nid == nid) {
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u64 ret = memblock_alloc_nid_unreserved(start, this_end,
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size, align);
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u64 ret = memblock_alloc_region(start, this_end, size, align);
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if (ret != ~(u64)0)
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return ret;
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}
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@ -351,6 +357,10 @@ u64 __init memblock_alloc_nid(u64 size, u64 align, int nid)
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BUG_ON(0 == size);
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/* We do a bottom-up search for a region with the right
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* nid since that's easier considering how memblock_nid_range()
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* works
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*/
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size = memblock_align_up(size, align);
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for (i = 0; i < mem->cnt; i++) {
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@ -383,7 +393,7 @@ u64 __init memblock_alloc_base(u64 size, u64 align, u64 max_addr)
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u64 __init __memblock_alloc_base(u64 size, u64 align, u64 max_addr)
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{
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long i, j;
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long i;
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u64 base = 0;
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u64 res_base;
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@ -396,33 +406,24 @@ u64 __init __memblock_alloc_base(u64 size, u64 align, u64 max_addr)
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if (max_addr == MEMBLOCK_ALLOC_ANYWHERE)
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max_addr = MEMBLOCK_REAL_LIMIT;
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/* Pump up max_addr */
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if (max_addr == MEMBLOCK_ALLOC_ANYWHERE)
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max_addr = ~(u64)0;
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/* We do a top-down search, this tends to limit memory
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* fragmentation by keeping early boot allocs near the
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* top of memory
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*/
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for (i = memblock.memory.cnt - 1; i >= 0; i--) {
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u64 memblockbase = memblock.memory.regions[i].base;
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u64 memblocksize = memblock.memory.regions[i].size;
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if (memblocksize < size)
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continue;
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if (max_addr == MEMBLOCK_ALLOC_ANYWHERE)
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base = memblock_align_down(memblockbase + memblocksize - size, align);
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else if (memblockbase < max_addr) {
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base = min(memblockbase + memblocksize, max_addr);
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base = memblock_align_down(base - size, align);
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} else
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continue;
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while (base && memblockbase <= base) {
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j = memblock_overlaps_region(&memblock.reserved, base, size);
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if (j < 0) {
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/* this area isn't reserved, take it */
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if (memblock_add_region(&memblock.reserved, base, size) < 0)
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return 0;
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return base;
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}
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res_base = memblock.reserved.regions[j].base;
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if (res_base < size)
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break;
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base = memblock_align_down(res_base - size, align);
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}
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base = min(memblockbase + memblocksize, max_addr);
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res_base = memblock_alloc_region(memblockbase, base, size, align);
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if (res_base != ~(u64)0)
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return res_base;
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}
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return 0;
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}
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@ -528,9 +529,3 @@ int memblock_is_region_reserved(u64 base, u64 size)
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return memblock_overlaps_region(&memblock.reserved, base, size) >= 0;
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}
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u64 __weak memblock_nid_range(u64 start, u64 end, int *nid)
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{
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*nid = 0;
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return end;
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}
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