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Thomas Gleixner says: ==================== This is the third version of the BPF/RT patch set which makes both coexist nicely. The long explanation can be found in the cover letter of the V1 submission: https://lore.kernel.org/r/20200214133917.304937432@linutronix.de V2 is here: https://lore.kernel.org/r/20200220204517.863202864@linutronix.de The following changes vs. V2 have been made: - Rebased to bpf-next, adjusted to the lock changes in the hashmap code. - Split the preallocation enforcement patch for instrumentation type BPF programs into two pieces: 1) Emit a one-time warning on !RT kernels when any instrumentation type BPF program uses run-time allocation. Emit also a corresponding warning in the verifier log. But allow the program to run for backward compatibility sake. After a grace period this should be enforced. 2) On RT reject such programs because on RT the memory allocator cannot be called from truly atomic contexts. - Fixed the fallout from V2 as reported by Alexei and 0-day - Removed the redundant preempt_disable() from trace_call_bpf() - Removed the unused export of trace_call_bpf() ==================== Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
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| kernel | ||
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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.