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| Filename | Latest commit message | Latest commit date |
|---|---|---|
5c09590982
[ Upstream commit 41c53caa5a61ebc9221b71cc37f4a90549f1121d ] Issue 1: -------- Reproduction steps: 1. sudo ethtool -C eth0 rx-usecs 128 2. sudo ethtool -C eth0 adaptive-rx on 3. sudo ethtool -C eth0 adaptive-rx off 4. ethtool -c eth0 expected output: rx-usecs 128 actual output: rx-usecs 0 Reason for issue: In stage 3, ethtool userspace calls first the ena_get_coalesce() handler to get the current value of all properties, and then the ena_set_coalesce() handler. When ena_get_coalesce() is called the adaptive interrupt moderation is still on. There is an if in the code that returns the rx_coalesce_usecs only if the adaptive interrupt moderation is off. And since it is still on, rx_coalesce_usecs is not set, meaning it stays 0. Solution to issue: Remove this if static interrupt moderation intervals have nothing to do with dynamic ones. Issue 2: -------- Reproduction steps: 1. sudo ethtool -C eth0 adaptive-rx on 2. sudo ethtool -C eth0 rx-usecs 128 3. ethtool -c eth0 expected output: rx-usecs 128 actual output: rx-usecs 0 Reason for issue: In stage 2, when ena_set_coalesce() is called, the handler tests if rx adaptive interrupt moderation is on, and if it is, it returns before getting to the part in the function that sets the rx non-adaptive interrupt moderation interval. Solution to issue: Remove the return from the function when rx adaptive interrupt moderation is on. Also cleaned up the fixed code in ena_set_coalesce by grouping together adaptive interrupt moderation toggling, and using && instead of nested ifs. Fixes: |
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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.