hello experts
I am using iMX8M mini(nitrogen8m mini) by boundary devices for my projects
this has LCD display and camera connected
I noticed that as soon as i touch few of the icons on the LCD screen the touch response is slow and the log messages show me
[ 593.680084] alloc_contig_range: 23 callbacks suppressed
[ 593.680089] alloc_contig_range: [98600, 98ee8) PFNs busy
[ 593.691252] alloc_contig_range: [98700, 98fe8) PFNs busy
[ 593.697671] alloc_contig_range: [98800, 990e8) PFNs busy
[ 593.703557] alloc_contig_range: [98900, 991e8) PFNs busy
[ 593.709410] alloc_contig_range: [98a00, 992e8) PFNs busy
[ 593.715438] alloc_contig_range: [98b00, 993e8) PFNs busy
---------after sometime
[ 813.320524] alloc_contig_range: 20 callbacks suppressed
[ 813.320529] alloc_contig_range: [9d100, 9d9cb) PFNs busy
[ 813.331983] alloc_contig_range: [9d200, 9dacb) PFNs busy
[ 813.338066] alloc_contig_range: [9d200, 9dbcb) PFNs busy
[ 813.344150] alloc_contig_range: [9ec00, 9f4cb) PFNs busy
[ 813.350252] alloc_contig_range: [9ed00, 9f5cb) PFNs busy
[ 813.363012] alloc_contig_range: [9ee00, 9f6cb) PFNs busy
[ 813.369245] alloc_contig_range: [9ef00, 9f7cb) PFNs busy
[ 813.375417] alloc_contig_range: [9f000, 9f8cb) PFNs busy
[ 813.381611] alloc_contig_range: [9f100, 9f9cb) PFNs busy
[ 813.387774] alloc_contig_range: [9f200, 9facb) PFNs busy
test scenario:
1) now the default value is cma=736M the LCD display is fine but the touch response is slow. and logcat messages show every time i touch a bunch of these messages alloc_contig_range: [9f200, 9facb) PFNs busy
what i have tried so far:
2) i changed the cma=1024M the LCD does not display anything and the kernel messages show some sort of crash.
is there are solution for this guys please let me know
Regards
Nick
