From: Paul Jackson Document the kernel boot parameter: relax_domain_level=. Signed-off-by: Paul Jackson Cc: Michael Kerrisk Reviewed-by: Li Zefan Signed-off-by: Andrew Morton --- Documentation/cpusets.txt | 3 +++ Documentation/kernel-parameters.txt | 4 ++++ 2 files changed, 7 insertions(+) diff -puN Documentation/cpusets.txt~doc-document-the-relax_domain_level-kernel-boot-argument Documentation/cpusets.txt --- a/Documentation/cpusets.txt~doc-document-the-relax_domain_level-kernel-boot-argument +++ a/Documentation/cpusets.txt @@ -546,6 +546,9 @@ otherwise initial value -1 that indicate ( 4 : search nodes in a chunk of node [on NUMA system] ) ( 5 : search system wide [on NUMA system] ) +The system default is 0 (no search). The system default can be +changed using the relax_domain_level= boot parameter. + This file is per-cpuset and affect the sched domain where the cpuset belongs to. Therefore if the flag 'sched_load_balance' of a cpuset is disabled, then 'sched_relax_domain_level' have no effect since diff -puN Documentation/kernel-parameters.txt~doc-document-the-relax_domain_level-kernel-boot-argument Documentation/kernel-parameters.txt --- a/Documentation/kernel-parameters.txt~doc-document-the-relax_domain_level-kernel-boot-argument +++ a/Documentation/kernel-parameters.txt @@ -1679,6 +1679,10 @@ and is between 256 and 4096 characters. Format: [,[,...]] See arch/*/kernel/reboot.c or arch/*/kernel/process.c + relax_domain_level= + [KNL, SMP] Set schedulers default relax_domain_level. + See Documentation/cpusets.txt. + reserve= [KNL,BUGS] Force the kernel to ignore some iomem area reservetop= [X86-32] _