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![]() Check that the "Can only be attached as root qdisc" error message from taprio is effective by attempting to attach it to a class of another taprio qdisc. That operation should fail. In the bug that was squashed by change "net/sched: taprio: try again to report q->qdiscs[] to qdisc_leaf()", grafting a child taprio to a root software taprio would be misinterpreted as a change() to the root taprio. Catch this by looking at whether the base-time of the root taprio has changed to follow the base-time of the child taprio, something which should have absolutely never happened assuming correct semantics. Vinicius points out that looking at "base_time" in the tc qdisc show output is unreliable because user space is in a race with the kernel applying the setting. So we create a helper bash script which waits while there is any pending schedule. Link: https://lore.kernel.org/netdev/87il9w0xx7.fsf@intel.com/ Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Pedro Tammela <pctammela@mojatatu.com> Link: https://lore.kernel.org/r/20230807193324.4128292-11-vladimir.oltean@nxp.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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drivers | ||
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include | ||
init | ||
io_uring | ||
ipc | ||
kernel | ||
lib | ||
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net | ||
rust | ||
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sound | ||
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usr | ||
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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.