diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 364c2dce8e70..1af62cd16c9d 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2064,8 +2064,14 @@ Kernel parameters hugetlb_cma= [HW,CMA,EARLY] The size of a CMA area used for allocation of gigantic hugepages. Or using node format, the size of a CMA area per node can be specified. - Format: nn[KMGTPE] or (node format) - <node>:nn[KMGTPE][,<node>:nn[KMGTPE]] + The size can be an absolute value (e.g., 2G) or a + percentage of the total memory or node memory (e.g., 20%). + Percentage-derived sizes are rounded down to a multiple of + the architecture's gigantic hugepage size and may become + zero. + Format: nn[KMGTPE] or nn% or (node format) + <node>:nn[KMGTPE][,<node>:nn[KMGTPE]] or + <node>:nn%[,<node>:nn%] The size must be a multiple of the gigantic page size. When using node format, this applies to each per-node size. |