From: Pasha Tatashin <pasha.tatashin@xxxxxxxxxx> Date: Fri, 12 May 2017 13:24:52 -0400 > Right now it is larger, but what I suggested is to add a new optimized > routine just for this case, which would do STBI for 64-bytes but > without membar (do membar at the end of memmap_init_zone() and > deferred_init_memmap() > > #define struct_page_clear(page) \ > __asm__ __volatile__( \ > "stxa %%g0, [%0]%2\n" \ > "stxa %%xg0, [%0 + %1]%2\n" \ > : /* No output */ \ > : "r" (page), "r" (0x20), "i"(ASI_BLK_INIT_QUAD_LDD_P)) > > And insert it into __init_single_page() instead of memset() > > The final result is 4.01s/T which is even faster compared to current > 4.97s/T Ok, indeed, that would work. -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
