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93fb0b10e7
Handle "guest stopped" propagation only for kvmclock, as the flag is set
if and only if kvmclock is "active", i.e. can only be set for Xen PV clock
if kvmclock *and* Xen PV clock are in-use by the guest, which creates very
bizarre behavior for the guest.
Simply restrict the flag to kvmclock, e.g. instead of trying to handle
Xen PV clock, as propagation of PVCLOCK_GUEST_STOPPED was unintentionally
added during a refactoring, and while Xen proper defines
XEN_PVCLOCK_GUEST_STOPPED, there's no evidence that Xen guests actually
support the flag.
Check and clear pvclock_set_guest_stopped_request if and only if kvmclock
is active to preserve the original behavior, i.e. keep the flag pending
if kvmclock happens to be disabled when KVM processes the initial request.
Fixes:
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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 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.