Direct mapped pages were freed when they were offlined, or they were not allocated. So we only need to free vmemmap pages, no need to free direct mapped pages.
Signed-off-by: Tang Chen <[email protected]> --- arch/x86/mm/init_64.c | 9 +++++++-- 1 files changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 368cc3f..e77d312 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -804,6 +804,10 @@ remove_pte_table(pte_t *pte_start, unsigned long addr, unsigned long end, if (IS_ALIGNED(addr, PAGE_SIZE) && IS_ALIGNED(next, PAGE_SIZE)) { + /* + * Do not free direct mapping pages since they were + * freed when offlining. + */ if (!direct) free_pagetable(pte_page(*pte), 0); @@ -819,10 +823,11 @@ remove_pte_table(pte_t *pte_start, unsigned long addr, unsigned long end, * remove the page when it is wholly filled with 0xFD. */ memset((void *)addr, PAGE_INUSE, next - addr); - page_addr = page_address(pte_page(*pte)); + page_addr = page_address(pte_page(*pte)); if (!memchr_inv(page_addr, PAGE_INUSE, PAGE_SIZE)) { - free_pagetable(pte_page(*pte), 0); + if (!direct) + free_pagetable(pte_page(*pte), 0); spin_lock(&init_mm.page_table_lock); pte_clear(&init_mm, addr, pte); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
