[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [Patch] Fixing 1G page allocation algorithm in libxc
Hi, Keir, This patch fixes 1G page allocation algorithm in libxc. Currently, cur_pages (which is used as index into page_array for fetching gfns) is used to judge whether it is proper here to allocated 1G pages. However, cur_pages == page_array[cur_pages] only holds true when it is below 4G. When it is above 4G, page_array[cur_pages] - cur_pages = 256M. As a result, when guest has 10G memory, 8 1G-pages are allocated. But only 2 of them have their corresponding gfns 1G aligned. The other 6 are forced to split to 2M pages, as their starting gfns are 4G+256M, 5G+256M ................. Inside the patch, true gfns are used instead of cur_pages to fix this issue. Signed-off-by: Shan Haitao <haitao.shan@xxxxxxxxx> Shan Haitao Attachment:
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