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056aad67f8
In order to perform an operation on a gpa range, we currently iterate over each page in a user memory slot for the given range. This is inefficient while dealing with a big range (e.g, a VMA), especially while unmaping a range. At present, with stage2 unmap on a range with a hugepage backed region, we clear the PMD when we unmap the first page in the loop. The remaining iterations simply traverse the page table down to the PMD level only to see that nothing is in there. This patch reworks the code to invoke the callback handlers on the biggest range possible within the memory slot to to reduce the number of times the handler is called. Cc: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Christoffer Dall <cdall@linaro.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.