On 9/18/18 10:27 PM, Christophe Leroy wrote:
There is no point in taking the page table lock as pte_frag is always NULL when we have only one fragment.Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr> --- arch/powerpc/mm/pgtable-frag.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/powerpc/mm/pgtable-frag.c b/arch/powerpc/mm/pgtable-frag.c index bc924822dcd6..ab4910e92aaf 100644 --- a/arch/powerpc/mm/pgtable-frag.c +++ b/arch/powerpc/mm/pgtable-frag.c @@ -85,6 +85,9 @@ static pte_t *get_pte_from_cache(struct mm_struct *mm) { void *pte_frag, *ret; + if (PTE_FRAG_NR == 1) + return NULL; + spin_lock(&mm->page_table_lock); ret = mm->context.pte_frag; if (ret) {
May be update get_pmd_from_cache too? -aneesh
