Hi Jianguo, On Wed, Sep 04, 2013 at 09:30:22PM +0800, Jianguo Wu wrote: >Since commit d39d33c332(thp: enable direct defrag), defrag is enable >for all transparent hugepage page faults by default, not only in >MADV_HUGEPAGE regions. > >Signed-off-by: Jianguo Wu <wujianguo@xxxxxxxxxx> >--- > mm/huge_memory.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) > >diff --git a/mm/huge_memory.c b/mm/huge_memory.c >index a92012a..abf047e 100644 >--- a/mm/huge_memory.c >+++ b/mm/huge_memory.c >@@ -28,10 +28,8 @@ > > /* > * By default transparent hugepage support is enabled for all mappings This is also stale. TRANSPARENT_HUGEPAGE_ALWAYS is not configured by default in order that avoid to risk increase the memory footprint of applications w/o a guaranteed benefit. Regards, Wanpeng Li >- * and khugepaged scans all mappings. Defrag is only invoked by >- * khugepaged hugepage allocations and by page faults inside >- * MADV_HUGEPAGE regions to avoid the risk of slowing down short lived >- * allocations. >+ * and khugepaged scans all mappings. Defrag is invoked by khugepaged >+ * hugepage allocations and by page faults for all hugepage allocations. > */ > unsigned long transparent_hugepage_flags __read_mostly = > #ifdef CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS >-- >1.8.1.2 > >-- >To unsubscribe, send a message with 'unsubscribe linux-mm' in >the body to majordomo@xxxxxxxxx. For more info on Linux MM, >see: http://www.linux-mm.org/ . >Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>