From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f198.google.com (mail-io0-f198.google.com [209.85.223.198]) by kanga.kvack.org (Postfix) with ESMTP id C02DD6B0317 for ; Fri, 5 May 2017 13:03:34 -0400 (EDT) Received: by mail-io0-f198.google.com with SMTP id e79so12941085ioi.6 for ; Fri, 05 May 2017 10:03:34 -0700 (PDT) Received: from aserp1040.oracle.com (aserp1040.oracle.com. [141.146.126.69]) by mx.google.com with ESMTPS id m188si5236473itd.54.2017.05.05.10.03.33 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 05 May 2017 10:03:33 -0700 (PDT) From: Pavel Tatashin Subject: [v3 8/9] powerpc: teach platforms not to zero struct pages memory Date: Fri, 5 May 2017 13:03:15 -0400 Message-Id: <1494003796-748672-9-git-send-email-pasha.tatashin@oracle.com> In-Reply-To: <1494003796-748672-1-git-send-email-pasha.tatashin@oracle.com> References: <1494003796-748672-1-git-send-email-pasha.tatashin@oracle.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, borntraeger@de.ibm.com, heiko.carstens@de.ibm.com, davem@davemloft.net If we are using deferred struct page initialization feature, most of "struct page"es are getting initialized after other CPUs are started, and hence we are benefiting from doing this job in parallel. However, we are still zeroing all the memory that is allocated for "struct pages" using the boot CPU. This patch solves this problem, by deferring zeroing "struct pages" to only when they are initialized on PowerPC platforms. Signed-off-by: Pavel Tatashin Reviewed-by: Shannon Nelson --- arch/powerpc/mm/init_64.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c index d42c6b3..c381bd7 100644 --- a/arch/powerpc/mm/init_64.c +++ b/arch/powerpc/mm/init_64.c @@ -181,7 +181,7 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node) if (vmemmap_populated(start, page_size)) continue; - p = vmemmap_alloc_block(page_size, node, true); + p = vmemmap_alloc_block(page_size, node, VMEMMAP_ZERO); if (!p) return -ENOMEM; -- 1.7.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org