Hi,
As of the 5.5 kernel I see boot errors in cma. It reserves 1G and then can't
activate an area. I added some prints. It's trying to activate the DMA
zone. This causes a driver to fail allocating a dma pool later on. The
coherent pool is the default 256MB. If I reduce cma from 1G to 512M
then it only tries activates DMA32 zone. I assume there was not enough cma
memory for DMA zone? Are there any configuration changes required due
to the DMA_ZONE and DMA_ZONE32 changes? I've attached my boot log.
[ 0.000000] cma: Reserved 1024 MiB at 0x00000000a0000000
...
[ 0.390448] Activating cma name: reserved, zone name: DMA
[ 0.396564] pfn = 0xa0000
[ 0.399522] cma->count = 262144
[ 0.406244] pfn failed on = c0000
[ 0.410002] cma: CMA area reserved could not be activated
static int __init cma_activate_area(struct cma *cma)
{
...
printk("Activating cma name: %s, zone name: %s\n", cma->name, zone->name);
printk("pfn = 0x%lx\n", pfn);
printk("cma->count = %lu\n", cma->count);
do {
unsigned j;
base_pfn = pfn;
for (j = pageblock_nr_pages; j; --j, pfn++) {
WARN_ON_ONCE(!pfn_valid(pfn));
/*
* alloc_contig_range requires the pfn range
* specified to be in the same zone. Make this
* simple by forcing the entire CMA resv range
* to be in the same zone.
*/
if (page_zone(pfn_to_page(pfn)) != zone) {
printk("pfn failed on = 0x%lx\n", pfn);
goto not_in_zone;
}
}
init_cma_reserved_pageblock(pfn_to_page(base_pfn));
} while (--i);
Thanks.
Attachment:
cma-fail.log
Description: Binary data
