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That feature, provided by Power9 DD2.0 and later, when supported by newer OPAL versions, allows us to sacrifice a queue (priority 7) in favor of merging all the escalation interrupts of the queues of a single VP into a single interrupt. This reduces the number of host interrupts used up by KVM guests especially when those guests use multiple priorities. It will also enable a future change to control the masking of the escalation interrupts more precisely to avoid spurious ones. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@ozlabs.org> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.