diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2020-05-11 22:58:24 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-20 23:39:58 +1000 |
| commit | 82a1b8ed5604cccf30b6ff03bcd61640cd26369b (patch) | |
| tree | 10edf3e4db0967b8a711e0808bc35c2d050f34b6 /Documentation | |
| parent | a0594e89c9dc8e37883cc0d6642d1baad9c0744e (diff) | |
powerpc/64s/hash: Add stress_slb kernel boot option to increase SLB faults
This option increases the number of SLB misses by limiting the number
of kernel SLB entries, and increased flushing of cached lookaside
information. This helps stress test difficult to hit paths in the
kernel.
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Relocate the code into arch/powerpc/mm, s/torture/stress/]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200511125825.3081305-1-mpe@ellerman.id.au
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index f2a93c8679e8..26ef1d74e642 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -871,6 +871,11 @@ can be useful when debugging issues that require an SLB miss to occur. + stress_slb [PPC] + Limits the number of kernel SLB entries, and flushes + them frequently to increase the rate of SLB faults + on kernel addresses. + disable= [IPV6] See Documentation/networking/ipv6.txt. |