Hi Randy, Thanks for your review and comments! please refer to inlined comments below. On 2013/1/24 7:39, Randy Dunlap wrote: > On 01/23/13 04:28, Yijing Wang wrote: >> 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. > > BIOS-configured Will update it. > >> + 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 > > s/mps/MPS/ > i.e., use "MPS" consistently. Will use mps consistently. > >> + 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 > > "And also" is redundant. Just say Also. Ok. > > What is (are) MRRS? MRRS is "Max Read Request Size" and MPS is "Max Payload Size". Need use "Max Read Request Size" instead of MRRS ? > >> + 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 > > system-wide Will update it. > >> + possible value (128B).This configuration could prevent it > > ^ Space before "This" > Thanks for reminder. >> + 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. >> > > -- Thanks! Yijing -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
