/proc/buddyinfo
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/proc/buddyinfo
This file is used primarily for diagnosing memory fragmentation issues. Using the buddy algorithm, each column represents the number of pages of a certain order (a certain size) that are available at any given time. For example, for zone DMA (direct memory access), there are 90 of 2^(0*PAGE_SIZE) chunks of memory. Similarly, there are 6 of 2^(1*PAGE_SIZE) chunks, and 2 of 2^(2*PAGE_SIZE) chunks of memory available.
The
DMA
row references the first 16 MB on a system, theHighMem
row references all memory greater than 4 GB on a system, and theNormal
row references all memory in between.The following is an example of the output typical of
/proc/buddyinfo
:Node 0, zone DMA 90 6 2 1 1 ...Node 0, zone Normal 1650 310 5 0 0 ...Node 0, zone HighMem 2 0 0 1 1 ...
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