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| Filename | Latest commit message | Latest commit date |
|---|---|---|
5af3e9d06d
This adds code to flush the partition-scoped page tables for a radix guest when dirty tracking is turned on or off for a memslot. Only the guest real addresses covered by the memslot are flushed. The reason for this is to get rid of any 2M PTEs in the partition-scoped page tables that correspond to host transparent huge pages, so that page dirtiness is tracked at a system page (4k or 64k) granularity rather than a 2M granularity. The page tables are also flushed when turning dirty tracking off so that the memslot's address space can be repopulated with THPs if possible. To do this, we add a new function kvmppc_radix_flush_memslot(). Since this does what's needed for kvmppc_core_flush_memslot_hv() on a radix guest, we now make kvmppc_core_flush_memslot_hv() call the new kvmppc_radix_flush_memslot() rather than calling kvm_unmap_radix() for each page in the memslot. This has the effect of fixing a bug in that kvmppc_core_flush_memslot_hv() was previously calling kvm_unmap_radix() without holding the kvm->mmu_lock spinlock, which is required to be held. Signed-off-by: Paul Mackerras <paulus@ozlabs.org> Reviewed-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@ozlabs.org> |
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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.