1*43ca106fSMinchan KimWhat: /sys/kernel/mm/cma/ 2*43ca106fSMinchan KimDate: Feb 2021 3*43ca106fSMinchan KimContact: Minchan Kim <minchan@kernel.org> 4*43ca106fSMinchan KimDescription: 5*43ca106fSMinchan Kim /sys/kernel/mm/cma/ contains a subdirectory for each CMA 6*43ca106fSMinchan Kim heap name (also sometimes called CMA areas). 7*43ca106fSMinchan Kim 8*43ca106fSMinchan Kim Each CMA heap subdirectory (that is, each 9*43ca106fSMinchan Kim /sys/kernel/mm/cma/<cma-heap-name> directory) contains the 10*43ca106fSMinchan Kim following items: 11*43ca106fSMinchan Kim 12*43ca106fSMinchan Kim alloc_pages_success 13*43ca106fSMinchan Kim alloc_pages_fail 14*43ca106fSMinchan Kim 15*43ca106fSMinchan KimWhat: /sys/kernel/mm/cma/<cma-heap-name>/alloc_pages_success 16*43ca106fSMinchan KimDate: Feb 2021 17*43ca106fSMinchan KimContact: Minchan Kim <minchan@kernel.org> 18*43ca106fSMinchan KimDescription: 19*43ca106fSMinchan Kim the number of pages CMA API succeeded to allocate 20*43ca106fSMinchan Kim 21*43ca106fSMinchan KimWhat: /sys/kernel/mm/cma/<cma-heap-name>/alloc_pages_fail 22*43ca106fSMinchan KimDate: Feb 2021 23*43ca106fSMinchan KimContact: Minchan Kim <minchan@kernel.org> 24*43ca106fSMinchan KimDescription: 25*43ca106fSMinchan Kim the number of pages CMA API failed to allocate 26