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| author | Yinghai Lu <yinghai@kernel.org> | 2010-10-11 10:40:25 -0700 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2010-10-11 17:08:36 -0400 |
| commit | e79f86b2ef9c0a8c47225217c1018b7d3d90101c (patch) | |
| tree | 53ba03cad303a566831fa03ebbfc408ab36ae36c /lib/swiotlb.c | |
| parent | 03620b2d7545fee29ecd3bb270f206b9cff75e58 (diff) | |
| download | lwn-e79f86b2ef9c0a8c47225217c1018b7d3d90101c.tar.gz lwn-e79f86b2ef9c0a8c47225217c1018b7d3d90101c.zip | |
swiotlb: Use page alignment for early buffer allocation
We could call free_bootmem_late() if swiotlb is not used, and
it will shrink to page alignment.
So alloc them with page alignment at first, to avoid lose two pages
before patch:
[ 0.000000] memblock_x86_reserve_range: [00d3600000, 00d7600000] swiotlb buffer
[ 0.000000] memblock_x86_reserve_range: [00d7e7ef40, 00d7e9ef40] swiotlb list
[ 0.000000] memblock_x86_reserve_range: [00d7e3ef40, 00d7e7ef40] swiotlb orig_ad
[ 0.000000] memblock_x86_reserve_range: [000008a000, 0000092000] swiotlb overflo
after patch will get
[ 0.000000] memblock_x86_reserve_range: [00d3600000, 00d7600000] swiotlb buffer
[ 0.000000] memblock_x86_reserve_range: [00d7e7e000, 00d7e9e000] swiotlb list
[ 0.000000] memblock_x86_reserve_range: [00d7e3e000, 00d7e7e000] swiotlb orig_ad
[ 0.000000] memblock_x86_reserve_range: [000008a000, 0000092000] swiotlb overflo
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'lib/swiotlb.c')
| -rw-r--r-- | lib/swiotlb.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c index b237e649cd5d..7c06ee51a29a 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -147,16 +147,16 @@ void __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) * to find contiguous free memory regions of size up to IO_TLB_SEGSIZE * between io_tlb_start and io_tlb_end. */ - io_tlb_list = alloc_bootmem(io_tlb_nslabs * sizeof(int)); + io_tlb_list = alloc_bootmem_pages(PAGE_ALIGN(io_tlb_nslabs * sizeof(int))); for (i = 0; i < io_tlb_nslabs; i++) io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE); io_tlb_index = 0; - io_tlb_orig_addr = alloc_bootmem(io_tlb_nslabs * sizeof(phys_addr_t)); + io_tlb_orig_addr = alloc_bootmem_pages(PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t))); /* * Get the overflow emergency buffer */ - io_tlb_overflow_buffer = alloc_bootmem_low(io_tlb_overflow); + io_tlb_overflow_buffer = alloc_bootmem_low_pages(PAGE_ALIGN(io_tlb_overflow)); if (!io_tlb_overflow_buffer) panic("Cannot allocate SWIOTLB overflow buffer!\n"); if (verbose) @@ -182,7 +182,7 @@ swiotlb_init_with_default_size(size_t default_size, int verbose) /* * Get IO TLB memory from the low pages */ - io_tlb_start = alloc_bootmem_low_pages(bytes); + io_tlb_start = alloc_bootmem_low_pages(PAGE_ALIGN(bytes)); if (!io_tlb_start) panic("Cannot allocate SWIOTLB buffer"); @@ -308,13 +308,13 @@ void __init swiotlb_free(void) get_order(io_tlb_nslabs << IO_TLB_SHIFT)); } else { free_bootmem_late(__pa(io_tlb_overflow_buffer), - io_tlb_overflow); + PAGE_ALIGN(io_tlb_overflow)); free_bootmem_late(__pa(io_tlb_orig_addr), - io_tlb_nslabs * sizeof(phys_addr_t)); + PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t))); free_bootmem_late(__pa(io_tlb_list), - io_tlb_nslabs * sizeof(int)); + PAGE_ALIGN(io_tlb_nslabs * sizeof(int))); free_bootmem_late(__pa(io_tlb_start), - io_tlb_nslabs << IO_TLB_SHIFT); + PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT)); } } |