From: Qi Zheng <[email protected]> On a 64-bit system, madvise(MADV_DONTNEED) may cause a large number of empty PTE page table pages (such as 100GB+). To resolve this problem, first enable MMU_GATHER_RCU_TABLE_FREE to prepare for enabling the PT_RECLAIM feature, which resolves this problem.
Signed-off-by: Qi Zheng <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Helge Deller <[email protected]> --- arch/parisc/Kconfig | 1 + arch/parisc/include/asm/tlb.h | 6 ++++-- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 47fd9662d8005..946cbe21a4118 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -92,6 +92,7 @@ config PARISC select TRACE_IRQFLAGS_SUPPORT select HAVE_FUNCTION_DESCRIPTORS if 64BIT select PCI_MSI_ARCH_FALLBACKS if PCI_MSI + select MMU_GATHER_RCU_TABLE_FREE help The PA-RISC microprocessor is designed by Hewlett-Packard and used diff --git a/arch/parisc/include/asm/tlb.h b/arch/parisc/include/asm/tlb.h index 44235f367674d..ab7d4113df61a 100644 --- a/arch/parisc/include/asm/tlb.h +++ b/arch/parisc/include/asm/tlb.h @@ -5,8 +5,10 @@ #include <asm-generic/tlb.h> #if CONFIG_PGTABLE_LEVELS == 3 -#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd) +#define __pmd_free_tlb(tlb, pmd, addr) \ + tlb_remove_ptdesc((tlb), virt_to_ptdesc(pmd)) #endif -#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte) +#define __pte_free_tlb(tlb, pte, addr) \ + tlb_remove_ptdesc((tlb), page_ptdesc(pte)) #endif -- 2.20.1
