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| Filename | Latest commit message | Latest commit date |
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6e4453b321
In preparation for supporting compaction and OOM notification, this patch reworks the inflate/deflate loops. The main idea is to separate the allocation, communication with the hypervisor, and the handling of errors from each other. Doing will allow us to perform concurrent inflation and deflation, excluding the actual communication with the hypervisor. To do so, we need to get rid of the remaining global state that is kept in the balloon struct, specifically the refuse_list. When the VM communicates with the hypervisor, it does not free or put back pages to the balloon list and instead only moves the pages whose status indicated failure into a refuse_list on the stack. Once the operation completes, the inflation or deflation functions handle the list appropriately. As we do that, we can consolidate the communication with the hypervisor for both the lock and unlock operations into a single function. We also reuse the deflation function for popping the balloon. As a preparation for preventing races, we hold a spinlock when the communication actually takes place, and use atomic operations for updating the balloon size. The balloon page list is still racy and will be handled in the next patch. Reviewed-by: Xavier Deguillard <xdeguillard@vmware.com> Signed-off-by: Nadav Amit <namit@vmware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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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 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.