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A mirror of the official Linux kernel repository just in case
c55f34a7a1
Alexander Lobakin says: ==================== netdev_features: start cleaning netdev_features_t up NETDEV_FEATURE_COUNT is currently 64, which means we can't add any new features as netdev_features_t is u64. As per several discussions, instead of converting netdev_features_t to a bitmap, which would mean A LOT of changes, we can try cleaning up netdev feature bits. There's a bunch of bits which don't really mean features, rather device attributes/properties that can't be changed via Ethtool in any of the drivers. Such attributes can be moved to netdev private flags without losing any functionality. Start converting some read-only netdev features to private flags from the ones that are most obvious, like lockless Tx, inability to change network namespace etc. I was able to reduce NETDEV_FEATURE_COUNT from 64 to 60, which mean 4 free slots for new features. There are obviously more read-only features to convert, such as highDMA, "challenged VLAN", HSR (4 bits) - this will be done in subsequent series. Please note that currently netdev features are not uAPI/ABI by any means. Ethtool passes their names and bits to the userspace separately and there are no hardcoded names/bits in the userspace, so that new Ethtool could work on older kernels and vice versa. This, however, isn't true for Ethtools < 3.4. I haven't changed the bit positions of the already existing features and instead replaced the freed bits with stubs. But it's anyway theoretically possible that Ethtools older than 2011 will break. I hope no currently supported distros supply such an ancient version. Shell scripts also most likely won't break since the removed bits were always read-only, meaning nobody would try touching them from a script. ==================== Link: https://patch.msgid.link/20240829123340.789395-1-aleksander.lobakin@intel.com Signed-off-by: Paolo Abeni <pabeni@redhat.com> |
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| 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 | ||
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| Kbuild | ||
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| 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.