diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2010-02-10 10:20:18 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-11 02:47:18 +0100 |
| commit | cef625eef8b4cd573a9f6a17861d34226aebf6c2 (patch) | |
| tree | cc5a32ff867bb856bac07c18315ad40be74aa351 /arch/x86/mm | |
| parent | x86: Dynamically increase early_res array size (diff) | |
| download | linux-cef625eef8b4cd573a9f6a17861d34226aebf6c2.tar.xz linux-cef625eef8b4cd573a9f6a17861d34226aebf6c2.zip | |
x86: Make early_node_mem get mem > 4 GB if possible
So we could put pgdata for the node high, and later sparse
vmmap will get the section nr that need.
With this patch will make <4 GB ram not use a sparse vmmap.
before this patch, will get, before swiotlb try get bootmem
[ 0.000000] nid=1 start=0 end=2080000 aligned=1
[ 0.000000] free [10 - 96]
[ 0.000000] free [b12 - 1000]
[ 0.000000] free [359f - 38a3]
[ 0.000000] free [38b5 - 3a00]
[ 0.000000] free [41e01 - 42000]
[ 0.000000] free [73dde - 73e00]
[ 0.000000] free [73fdd - 74000]
[ 0.000000] free [741dd - 74200]
[ 0.000000] free [743dd - 74400]
[ 0.000000] free [745dd - 74600]
[ 0.000000] free [747dd - 74800]
[ 0.000000] free [749dd - 74a00]
[ 0.000000] free [74bdd - 74c00]
[ 0.000000] free [74ddd - 74e00]
[ 0.000000] free [74fdd - 75000]
[ 0.000000] free [751dd - 75200]
[ 0.000000] free [753dd - 75400]
[ 0.000000] free [755dd - 75600]
[ 0.000000] free [757dd - 75800]
[ 0.000000] free [759dd - 75a00]
[ 0.000000] free [75bdd - 7bf5f]
[ 0.000000] free [7f730 - 7f750]
[ 0.000000] free [100000 - 2080000]
[ 0.000000] total free 1f87170
[ 93.301474] Placing 64MB software IO TLB between ffff880075bdd000 - ffff880079bdd000
[ 93.311814] software IO TLB at phys 0x75bdd000 - 0x79bdd000
with this patch will get: before swiotlb try get bootmem
[ 0.000000] nid=1 start=0 end=2080000 aligned=1
[ 0.000000] free [a - 96]
[ 0.000000] free [702 - 1000]
[ 0.000000] free [359f - 3600]
[ 0.000000] free [37de - 3800]
[ 0.000000] free [39dd - 3a00]
[ 0.000000] free [3bdd - 3c00]
[ 0.000000] free [3ddd - 3e00]
[ 0.000000] free [3fdd - 4000]
[ 0.000000] free [41dd - 4200]
[ 0.000000] free [43dd - 4400]
[ 0.000000] free [45dd - 4600]
[ 0.000000] free [47dd - 4800]
[ 0.000000] free [49dd - 4a00]
[ 0.000000] free [4bdd - 4c00]
[ 0.000000] free [4ddd - 4e00]
[ 0.000000] free [4fdd - 5000]
[ 0.000000] free [51dd - 5200]
[ 0.000000] free [53dd - 5400]
[ 0.000000] free [55dd - 7bf5f]
[ 0.000000] free [7f730 - 7f750]
[ 0.000000] free [100428 - 100600]
[ 0.000000] free [13ea01 - 13ec00]
[ 0.000000] free [170800 - 2080000]
[ 0.000000] total free 1f87170
[ 92.689485] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
[ 92.699799] Placing 64MB software IO TLB between ffff8800055dd000 - ffff8800095dd000
[ 92.710916] software IO TLB at phys 0x55dd000 - 0x95dd000
so will get enough space below 4G, aka pfn 0x100000
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <1265793639-15071-15-git-send-email-yinghai@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/numa_64.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c index 3232148756ce..02f13cb99bc2 100644 --- a/arch/x86/mm/numa_64.c +++ b/arch/x86/mm/numa_64.c @@ -163,14 +163,27 @@ static void * __init early_node_mem(int nodeid, unsigned long start, unsigned long end, unsigned long size, unsigned long align) { - unsigned long mem = find_e820_area(start, end, size, align); + unsigned long mem; + /* + * put it on high as possible + * something will go with NODE_DATA + */ + if (start < (MAX_DMA_PFN<<PAGE_SHIFT)) + start = MAX_DMA_PFN<<PAGE_SHIFT; + if (start < (MAX_DMA32_PFN<<PAGE_SHIFT) && + end > (MAX_DMA32_PFN<<PAGE_SHIFT)) + start = MAX_DMA32_PFN<<PAGE_SHIFT; + mem = find_e820_area(start, end, size, align); if (mem != -1L) return __va(mem); - - start = __pa(MAX_DMA_ADDRESS); - end = max_low_pfn_mapped << PAGE_SHIFT; + /* extend the search scope */ + end = max_pfn_mapped << PAGE_SHIFT; + if (end > (MAX_DMA32_PFN<<PAGE_SHIFT)) + start = MAX_DMA32_PFN<<PAGE_SHIFT; + else + start = MAX_DMA_PFN<<PAGE_SHIFT; mem = find_e820_area(start, end, size, align); if (mem != -1L) return __va(mem); |