i.MX ProcessorsのトピックRe: CMA issue,alloc_contig_range: [9fca0, 9fcb4) PFNs busy

CMA issue,alloc_contig_range: [9fca0, 9fcb4) PFNs busy

liuxin360429 — Mon, 14 Dec 2020 09:22:00 GMT

Hi,everyone!

I had a problem with my linux-4.1.15 on imx6ul ,sometimes "alloc_contig_range: [9fca0, 9fcb4) PFNs busy" will be printed .What should i do to solve this problem?

Re: CMA issue,alloc_contig_range: [9fca0, 9fcb4) PFNs busy

joanxie — Tue, 15 Dec 2020 09:06:31 GMT

as I known, For log 'alloc_contig_range [xxxx, xxxx) PFNs busy' , it is just one warning when some memory range is busy, and kernel will continue search next range of memory.

Re: CMA issue,alloc_contig_range: [9fca0, 9fcb4) PFNs busy

liuxin360429 — Tue, 15 Dec 2020 09:16:02 GMT

Thank you for your reply! I checked my /proc/meminfo and the cma just used 10%(total is 4MB) .But this warning appeared every 60 seconds.......so annoying!

Re: CMA issue,alloc_contig_range: [9fca0, 9fcb4) PFNs busy

joanxie — Mon, 21 Dec 2020 09:15:04 GMT

maybe you can upgrade to the newer bsp version, 4.1.15 is too old to fix