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9f78bf330a
When we try to start AF_XDP on some machines with long running time, due to the machine's memory fragmentation problem, there is no sufficient contiguous physical memory that will cause the start failure. If the size of the queue is 8 * 1024, then the size of the desc[] is 8 * 1024 * 8 = 16 * PAGE, but we also add struct xdp_ring size, so it is 16page+. This is necessary to apply for a 4-order memory. If there are a lot of queues, it is difficult to these machine with long running time. Here, that we actually waste 15 pages. 4-Order memory is 32 pages, but we only use 17 pages. This patch replaces __get_free_pages() by vmalloc() to allocate memory to solve these problems. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Magnus Karlsson <magnus.karlsson@intel.com> Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .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 Restructured Text 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.