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| author | Ingo Molnar <mingo@kernel.org> | 2021-04-11 14:31:43 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2021-04-11 14:31:43 +0200 |
| commit | 120b566d1df22a0a4543ac0e8aef875c49dd2c21 (patch) | |
| tree | b13547dadf5cd29cae5341629771192be8db4a28 /Documentation/admin-guide/kernel-parameters.rst | |
| parent | e49d033bddf5b565044e2abe4241353959bc9120 (diff) | |
| parent | ab6ad3dbddaf09f7df2d830766a2fb68d6ad669f (diff) | |
Merge branch 'for-mingo-rcu' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull RCU changes from Paul E. McKenney:
- Bitmap support for "N" as alias for last bit
- kvfree_rcu updates
- mm_dump_obj() updates. (One of these is to mm, but was suggested by Andrew Morton.)
- RCU callback offloading update
- Polling RCU grace-period interfaces
- Realtime-related RCU updates
- Tasks-RCU updates
- Torture-test updates
- Torture-test scripting updates
- Miscellaneous fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.rst')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.rst b/Documentation/admin-guide/kernel-parameters.rst index 1132796a8d96..d6e3f67953a7 100644 --- a/Documentation/admin-guide/kernel-parameters.rst +++ b/Documentation/admin-guide/kernel-parameters.rst @@ -68,6 +68,13 @@ For example one can add to the command line following parameter: where the final item represents CPUs 100,101,125,126,150,151,... +The value "N" can be used to represent the numerically last CPU on the system, +i.e "foo_cpus=16-N" would be equivalent to "16-31" on a 32 core system. + +Keep in mind that "N" is dynamic, so if system changes cause the bitmap width +to change, such as less cores in the CPU list, then N and any ranges using N +will also change. Use the same on a small 4 core system, and "16-N" becomes +"16-3" and now the same boot input will be flagged as invalid (start > end). This document may not be entirely up to date and comprehensive. The command |