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bf1e15a82e
The main thread could start to send SIG_IPI at any time, even before signal blocked on vcpu thread. Therefore, start the vcpu thread with the signal blocked. Without this patch, on very busy cores the dirty_log_test could fail directly on receiving a SIGUSR1 without a handler (when vcpu runs far slower than main). Reported-by: Peter Xu <peterx@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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.