On Saturday 09 November 2013 11:55 AM, Konrad Rzeszutek Wilk wrote: > Santosh Shilimkar <santosh.shilimkar@xxxxxx> wrote: >> Switch to memblock interfaces for early memory allocator instead of >> bootmem allocator. No functional change in beahvior than what it is >> in current code from bootmem users points of view. >> >> Archs already converted to NO_BOOTMEM now directly use memblock >> interfaces instead of bootmem wrappers build on top of memblock. And >> the >> archs which still uses bootmem, these new apis just fallback to exiting >> bootmem APIs. >> >> Cc: Yinghai Lu <yinghai@xxxxxxxxxx> >> Cc: Tejun Heo <tj@xxxxxxxxxx> >> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> >> Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> >> >> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx> >> --- >> lib/swiotlb.c | 36 +++++++++++++++++++++--------------- >> 1 file changed, 21 insertions(+), 15 deletions(-) >> >> diff --git a/lib/swiotlb.c b/lib/swiotlb.c >> index 4e8686c..78ac01a 100644 >> --- a/lib/swiotlb.c >> +++ b/lib/swiotlb.c >> @@ -169,8 +169,9 @@ int __init swiotlb_init_with_tbl(char *tlb, >> unsigned long nslabs, int verbose) >> /* >> * Get the overflow emergency buffer >> */ >> - v_overflow_buffer = alloc_bootmem_low_pages_nopanic( >> - PAGE_ALIGN(io_tlb_overflow)); >> + v_overflow_buffer = memblock_virt_alloc_align_nopanic( >> + PAGE_ALIGN(io_tlb_overflow), >> + PAGE_SIZE); > > Does this guarantee that the pages will be allocated below 4GB? > Yes. The memblock layer still allocates memory from lowmem. As I mentioned, there is no change in the behavior than what is today apart from just the interface change. Regards, Santosh -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>