From: Nadav Amit <namit@xxxxxxxxxx> The next patches might cause spurious instruction faults on x86. To prevent them from occurring too much, call flush_tlb_fix_spurious_fault() for page-faults on code fetching as well. The callee is expected to do a full flush, or whatever is necessary to avoid further TLB flushes. Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxx> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> Cc: David Hildenbrand <david@xxxxxxxxxx> Cc: Peter Xu <peterx@xxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Cc: Yu Zhao <yuzhao@xxxxxxxxxx> Cc: Nick Piggin <npiggin@xxxxxxxxx> Signed-off-by: Nadav Amit <namit@xxxxxxxxxx> --- mm/memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/memory.c b/mm/memory.c index 31ec3f0071a2..152a47876c36 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4924,7 +4924,7 @@ static vm_fault_t handle_pte_fault(struct vm_fault *vmf) * This still avoids useless tlb flushes for .text page faults * with threads. */ - if (vmf->flags & FAULT_FLAG_WRITE) + if (vmf->flags & (FAULT_FLAG_WRITE|FAULT_FLAG_INSTRUCTION)) flush_tlb_fix_spurious_fault(vmf->vma, vmf->address); } unlock: -- 2.25.1
