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32c2e6c2e4
commit 1958ff5ad2d4908b44a72bcf564dfe67c981e7fe upstream. The reasoning for this change is that if we already had a packet pending, then we also already had a pending timer, and as such there is no need to reschedule it. This also prevents packets getting delayed 60 ms worst case under a tiny packet every 290us transmit load, by keeping the timeout always relative to the first queued up packet. (300us delay * 16KB max aggregation / 80 byte packet =~ 60 ms) As such the first packet is now at most delayed by 300us. Under low transmit load, this will simply result in us sending a shorter aggregate, as originally intended. This patch has the benefit of greatly reducing (by ~10 factor with 1500 byte frames aggregated into 16 kiB) the number of (potentially pretty costly) updates to the hrtimer. Cc: Brooke Basile <brookebasile@gmail.com> Cc: Bryan O'Donoghue <bryan.odonoghue@linaro.org> Cc: Felipe Balbi <balbi@kernel.org> Cc: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: Maciej Żenczykowski <maze@google.com> Link: https://lore.kernel.org/r/20210608085438.813960-1-zenczykowski@gmail.com Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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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.