Hi,
Linux 4.5 introduced additional checks to ensure that compound pages are
never marked as reserved. In our code we use PG_reserved to ensure that
the kernel does never swap out such pages, e.g.
int i;
struct page *pages = alloc_pages(GFP_HIGHUSER | __GFP_COMP, 4);
for (i = 0; i < 16; i++)
SetPageReserved(&pages[i]);
The purpose of setting PG_reserved is to prevent the kernel from swapping
this memory out. This worked with older kernel but not with Linux 4.5 as
setting PG_reserved to compound pages is not allowed any more.
Can somebody explain how we can achieve the same result in accordance to
the new Linux 4.5 rules?
Thanks,
Frank
--
Dr.-Ing. Frank Mehnert | Software Development Director, VirtualBox
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