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

[liuxin360429]

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?

[joanxie]

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.

[liuxin360429]

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! 

[joanxie]

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