| Message ID | 20210810094835.13402-2-bhe@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Avoid requesting page from DMA zone when no managed pages | expand |
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index bdb22006f713..970ed65db89f 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -653,7 +653,9 @@ coherent_pool=nn[KMG] [ARM,KNL] Sets the size of memory pool for coherent, atomic dma - allocations, by default set to 256K. + allocations. Otherwise the default size will be scaled + with memory capacity, while clamped between 128K and + 1 << (PAGE_SHIFT + MAX_ORDER-1). com20020= [HW,NET] ARCnet - COM20020 chipset Format:
Since commit 1d659236fb43("dma-pool: scale the default DMA coherent pool size with memory capacity"), the default size of atomic pool has been changed to take by scaling with system memory capacity. So update the document in kerenl-parameter.txt accordingly. Signed-off-by: Baoquan He <bhe@redhat.com> --- Documentation/admin-guide/kernel-parameters.txt | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)