lkml.org 
[lkml]   [2013]   [Jan]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [Update][PATCH] PCI: Document PCIE BUS MPS parameters
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@myri.com> 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@huawei.com>
> ---
> 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

> + 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.

> + 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.

What is (are) 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

> + possible value (128B).This configuration could prevent it

^ Space before "This"

> + 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.
>


--
~Randy


\
 
 \ /
  Last update: 2013-01-24 01:21    [W:0.054 / U:0.048 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site