Document PCIE BUS MPS parameters pcie_bus_tune_off, pcie_bus_safe, pcie_bus_peer2peer, pcie_bus_perf into Documentation/kernel-parameters.txt. These parameters were introduced by Jon Mason <mason@xxxxxxxx> at commit 5f39e6705 and commit b03e7495a8. Document these into kernel-parameters.txt can help users to understand and use the parameters. Signed-off-by: Yijing Wang <wangyijing@xxxxxxxxxx> --- Documentation/kernel-parameters.txt | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 363e348..1fb269b 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -2227,6 +2227,21 @@ bytes respectively. Such letter suffixes can also be entirely omitted. This sorting is done to get a device order compatible with older (<= 2.4) kernels. nobfsort Don't sort PCI devices into breadth-first order. + pcie_bus_tune_off Disable PCI-E MPS turning and using + the BIOS configured MPS defaults. + pcie_bus_safe Use the smallest common denominator MPS + of the entire tree below a root complex for every device + on that fabric. Can avoid inconsistent mps problem caused + by hotplug. + pcie_bus_perf Configure pcie device MPS to the largest allowable + MPS based on its parent bus. And also set MRRS to the + largest supported value but cannot be configured larger + than the MPS the device or the bus can support for Max + performance. + pcie_bus_peer2peer Make the system wide MPS the smallest + possible value (128B).This configuration could prevent it + from working by having the MPS on one root port different + than the MPS on another. cbiosize=nn[KMG] The fixed amount of bus space which is reserved for the CardBus bridge's IO window. The default value is 256 bytes. -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
