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In the current design, a numa-node is made online only if that node is attached to cpu/memory. With this design, if any PCI/IO device is found to be attached to a numa-node which is not online then the numa-node id of the corresponding PCI/IO device is set to NUMA_NO_NODE(-1). This design may negatively impact the performance of PCIe device if the numa-node assigned to PCIe device is -1 because in such case we may not be able to accurately calculate the distance between two nodes. The multi-controller NVMe PCIe disk has an issue with calculating the node distance if the PCIe NVMe controller is attached to a PCI host bridge which has numa-node id value set to NUMA_NO_NODE. This patch helps fix this ensuring that a cpu/memory less numa node is made online if it's attached to PCI host bridge. Signed-off-by: Nilay Shroff <nilay@linux.ibm.com> Reviewed-by: Srikar Dronamraju <srikar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240517142531.3273464-3-nilay@linux.ibm.com |
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| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.