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| Filename | Latest commit message | Latest commit date |
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6ba55716a2
Currently the options we have for sending NMIs are not necessarily safe, that is they can potentially interrupt a CPU in a non-recoverable region of code, meaning the kernel must then panic(). But we'd like to use smp_send_nmi_ipi() to do cross-CPU calls in situations where we don't want to risk a panic(), because it doesn't have the requirement that interrupts must be enabled like smp_call_function(). So add an API for the caller to indicate that it wants to use the NMI infrastructure, but doesn't want to do anything "unsafe". Currently that is implemented by not actually calling cause_nmi_ipi(), instead falling back to an IPI. In future we can pass the safe parameter down to cause_nmi_ipi() and the individual backends can potentially take it into account before deciding what to do. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> |
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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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.