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We previously hooked the tcp_drop_reason() function using BPF to monitor TCP drop reasons. However, after upgrading our compiler from GCC 9 to GCC 11, tcp_drop_reason() is now inlined, preventing us from hooking into it. To address this, it would be beneficial to make noinline explicitly for tracing. Link: https://lore.kernel.org/netdev/CANn89iJuShCmidCi_ZkYABtmscwbVjhuDta1MS5LxV_4H9tKOA@mail.gmail.com/ Suggested-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Cc: Menglong Dong <menglong8.dong@gmail.com> Link: https://patch.msgid.link/20241024093742.87681-3-laoar.shao@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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.