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| Filename | Latest commit message | Latest commit date |
|---|---|---|
272ffaadeb
Without rtnl lock protection tcf proto can be deleted concurrently. Check tcf proto 'deleting' flag after taking tcf spinlock to verify that no concurrent deletion is in progress. Return EAGAIN error if concurrent deletion detected, which will cause caller to retry and possibly create new instance of tcf proto. Retry mechanism is a result of fine-grained locking approach used in this and previous changes in series and is necessary to allow concurrent updates on same chain instance. Alternative approach would be to lock the whole chain while updating filters on any of child tp's, adding and removing classifier instances from the chain. However, since most CPU-intensive parts of filter update code are specifically in classifier code and its dependencies (extensions and hw offloads), such approach would negate most of the gains introduced by this change and previous changes in the series when updating same chain instance. Signed-off-by: Vlad Buslov <vladbu@mellanox.com> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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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 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.