diff options
| author | Scott Wood <swood@redhat.com> | 2019-10-12 02:00:54 -0500 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2019-10-17 18:04:51 +0200 |
| commit | 1edae1ae62589f28d00da186465a003e2a7f9c6c (patch) | |
| tree | 213493dec97626c3f43f7ffcca8a9285e2a750f3 /kernel | |
| parent | 9d40b85bb46a99bc95dad3a07787da93b0a018e9 (diff) | |
| download | linux-1edae1ae62589f28d00da186465a003e2a7f9c6c.tar.bz2 | |
x86/Kconfig: Enforce limit of 512 CPUs with MAXSMP and no CPUMASK_OFFSTACK
The help text of NR_CPUS says that the maximum number of CPUs supported
without CPUMASK_OFFSTACK is 512. However, NR_CPUS_RANGE_END allows this
limit to be bypassed by MAXSMP even if CPUMASK_OFFSTACK is not set.
This scenario can currently only happen in the RT tree, since it has
"select CPUMASK_OFFSTACK if !PREEMPT_RT_FULL" in MAXSMP. However,
even if we ignore the RT tree, checking for MAXSMP in addition to
CPUMASK_OFFSTACK is redundant.
Signed-off-by: Scott Wood <swood@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mike Travis <mike.travis@hpe.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20191012070054.28657-1-swood@redhat.com
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions