This is v4 post. The v3 post can be found here: http://lkml.kernel.org/r/20190216140008.28671-1-...@redhat.com
The v2 post was here: https://lkml.org/lkml/2018/9/9/56 This patchset includes the original three code bug fix patches in v2, and two new patches to improve code comments about kaslr_memory_region and open code unnecessary function get_padding(), meanwhile carry the known SGI UV bug fix. This patchset sits on top of another patchset earlier posted: http://lkml.kernel.org/r/20190308025616.21440-1-...@redhat.com [PATCH v3 0/2] x86/mm/KASLR: Change the granularity of randomization to PUD size in 5-level [PATCH v3 2/2] x86/mm/KASLR: Change the granularity of randomization to PUD size in 5-level [PATCH v3 1/2] x86/mm/KASLR: Only build one PUD entry of area for real mode trampoline Note: SGI UV bug fix is not tested yet, the idea was approved by SGI UV expert Mike Travis, and the old post as below was tested and has been merged into our RHEL distros. This new change doesn't change the way to calculate the size of the direct mapping section, but only wrap the calculation code into a new function calc_direct_mapping_size() according to Ingo's suggestion. https://lkml.org/lkml/2017/5/18/102 Changelog: v3->v4: Update patches according to Kees's reviewing comments: - Fix typos and move operation comment above kernel_randomize_memory() for patch 1/6; - Change 'PAGE_SIZE' to 'PAGE_SIZE/4' in patch 3/6; - Add code comment about the calculation of vmemmap in patch 5/6; v2->v3: Added three patches according to Ingo's suggestions: - Add code comment about struct kaslr_memory_region; - Open code get_padding(); - Carry the SGI UV fix; Baoquan He (6): x86/mm/KASLR: Improve code comments about struct kaslr_memory_region x86/mm/KASLR: Open code unnecessary function get_padding mm: Add build time sanity chcek for struct page size x86/mm/KASLR: Fix the wrong calculation of memory region initial size x86/mm/KASLR: Calculate the actual size of vmemmap region x86/mm/KASLR: Do not adapt the size of the direct mapping region for SGI UV system arch/x86/mm/kaslr.c | 134 +++++++++++++++++++++++++++++++++++--------- mm/page_alloc.c | 2 + 2 files changed, 109 insertions(+), 27 deletions(-) -- 2.17.2
