diff options
| author | Mark Brown <broonie@kernel.org> | 2024-01-31 13:17:06 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-01-31 13:17:06 +0000 |
| commit | b25c4e5684cd4e5a3528485918e34f04a4bea3e5 (patch) | |
| tree | d90c34ef9bdd7b21ada3ac9a6fb027ba9715e7f2 /Documentation/admin-guide | |
| parent | ASoC: sh: rz-ssi: Fix error message print (diff) | |
| parent | ASoC: SOF: amd: refactor acp driver pm ops (diff) | |
| download | linux-b25c4e5684cd4e5a3528485918e34f04a4bea3e5.tar.gz linux-b25c4e5684cd4e5a3528485918e34f04a4bea3e5.zip | |
soundwire/SOF: add SoundWire Interface support for
Merge series from Vijendar Mukunda <Vijendar.Mukunda@amd.com>:
This patch series is to redesign existing platform device creation logic
for SoundWire managers and Implement generic functions for SoundWire
manager probe, start and exit sequence which are common for both Legacy
(NO DSP enabled) and SOF stack, and add SoundWire Interface support for
AMD SOF stack (ACP 6.3 based platform).
The patch series was reviewed in
https://github.com/thesofproject/linux/pull/4699
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.rst | 5 | ||||
| -rw-r--r-- | Documentation/admin-guide/kernel-per-CPU-kthreads.rst | 16 |
2 files changed, 6 insertions, 15 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.rst b/Documentation/admin-guide/kernel-parameters.rst index 102937bc8443..4410384596a9 100644 --- a/Documentation/admin-guide/kernel-parameters.rst +++ b/Documentation/admin-guide/kernel-parameters.rst @@ -218,8 +218,3 @@ bytes respectively. Such letter suffixes can also be entirely omitted: .. include:: kernel-parameters.txt :literal: - -Todo ----- - - Add more DRM drivers. diff --git a/Documentation/admin-guide/kernel-per-CPU-kthreads.rst b/Documentation/admin-guide/kernel-per-CPU-kthreads.rst index 993c2a05f5ee..b6aeae3327ce 100644 --- a/Documentation/admin-guide/kernel-per-CPU-kthreads.rst +++ b/Documentation/admin-guide/kernel-per-CPU-kthreads.rst @@ -243,13 +243,9 @@ To reduce its OS jitter, do any of the following: 3. Do any of the following needed to avoid jitter that your application cannot tolerate: - a. Build your kernel with CONFIG_SLUB=y rather than - CONFIG_SLAB=y, thus avoiding the slab allocator's periodic - use of each CPU's workqueues to run its cache_reap() - function. - b. Avoid using oprofile, thus avoiding OS jitter from + a. Avoid using oprofile, thus avoiding OS jitter from wq_sync_buffer(). - c. Limit your CPU frequency so that a CPU-frequency + b. Limit your CPU frequency so that a CPU-frequency governor is not required, possibly enlisting the aid of special heatsinks or other cooling technologies. If done correctly, and if you CPU architecture permits, you should @@ -259,7 +255,7 @@ To reduce its OS jitter, do any of the following: WARNING: Please check your CPU specifications to make sure that this is safe on your particular system. - d. As of v3.18, Christoph Lameter's on-demand vmstat workers + c. As of v3.18, Christoph Lameter's on-demand vmstat workers commit prevents OS jitter due to vmstat_update() on CONFIG_SMP=y systems. Before v3.18, is not possible to entirely get rid of the OS jitter, but you can @@ -274,7 +270,7 @@ To reduce its OS jitter, do any of the following: (based on an earlier one from Gilad Ben-Yossef) that reduces or even eliminates vmstat overhead for some workloads at https://lore.kernel.org/r/00000140e9dfd6bd-40db3d4f-c1be-434f-8132-7820f81bb586-000000@email.amazonses.com. - e. If running on high-end powerpc servers, build with + d. If running on high-end powerpc servers, build with CONFIG_PPC_RTAS_DAEMON=n. This prevents the RTAS daemon from running on each CPU every second or so. (This will require editing Kconfig files and will defeat @@ -282,12 +278,12 @@ To reduce its OS jitter, do any of the following: due to the rtas_event_scan() function. WARNING: Please check your CPU specifications to make sure that this is safe on your particular system. - f. If running on Cell Processor, build your kernel with + e. If running on Cell Processor, build your kernel with CBE_CPUFREQ_SPU_GOVERNOR=n to avoid OS jitter from spu_gov_work(). WARNING: Please check your CPU specifications to make sure that this is safe on your particular system. - g. If running on PowerMAC, build your kernel with + f. If running on PowerMAC, build your kernel with CONFIG_PMAC_RACKMETER=n to disable the CPU-meter, avoiding OS jitter from rackmeter_do_timer(). |
