From patchwork Wed Sep 20 20:17:14 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Tatashin X-Patchwork-Id: 9962373 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 862CA601D5 for ; Wed, 20 Sep 2017 20:22:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 77595290B0 for ; Wed, 20 Sep 2017 20:22:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6A6DC290E4; Wed, 20 Sep 2017 20:22:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id BEAE0290B0 for ; Wed, 20 Sep 2017 20:22:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=5KrnuraiF1goXv+S2+xdCrHQOaoBeX7TEqWP2cX0Hps=; b=Ys6A/AH4bBfvwq BZFTYTFD6IpnlUkdy5+7NbsqXEZG6pN17+NzDg3o8+FUKNji3zzAv98kaYBaY4XPpPGSkhGY0dsoy hHwAM6eq6eHxRCyGTYapwOwnWMtYkx56Ddt+X4u8Mx3h+zHxp+5DJm190CfHnxTVyMknkayeLm2yP MUiHV9xSLmjL+PPuaG2Vhq7WE03AdqTxcEW5wsr+e+kS1nV4qSvnljtVUWuFm9VAiadbxoJvsU44o iuAjZh84EvYbMWh3QueGgk9Uls/e2GypTSIBEkW2RdzIimgjpieNS/lCwjTSBiReVIxcUDLBNRK8L xelf/w1VwkoBYz6B1I0A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dulVT-0005FV-Bn; Wed, 20 Sep 2017 20:22:03 +0000 Received: from aserp1040.oracle.com ([141.146.126.69]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dulS2-0001Ef-5o for linux-arm-kernel@lists.infradead.org; Wed, 20 Sep 2017 20:18:40 +0000 Received: from aserv0022.oracle.com (aserv0022.oracle.com [141.146.126.234]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id v8KKHdr5011538 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 20 Sep 2017 20:17:39 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id v8KKHdPi021706 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 20 Sep 2017 20:17:39 GMT Received: from abhmp0008.oracle.com (abhmp0008.oracle.com [141.146.116.14]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id v8KKHdaA007295; Wed, 20 Sep 2017 20:17:39 GMT Received: from xakep.us.oracle.com (/10.154.127.176) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 20 Sep 2017 13:17:39 -0700 From: Pavel Tatashin To: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org, kasan-dev@googlegroups.com, borntraeger@de.ibm.com, heiko.carstens@de.ibm.com, davem@davemloft.net, willy@infradead.org, mhocko@kernel.org, ard.biesheuvel@linaro.org, mark.rutland@arm.com, will.deacon@arm.com, catalin.marinas@arm.com, sam@ravnborg.org, mgorman@techsingularity.net, steven.sistare@oracle.com, daniel.m.jordan@oracle.com, bob.picco@oracle.com Subject: [PATCH v9 12/12] mm: stop zeroing memory during allocation in vmemmap Date: Wed, 20 Sep 2017 16:17:14 -0400 Message-Id: <20170920201714.19817-13-pasha.tatashin@oracle.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20170920201714.19817-1-pasha.tatashin@oracle.com> References: <20170920201714.19817-1-pasha.tatashin@oracle.com> X-Source-IP: aserv0022.oracle.com [141.146.126.234] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170920_131830_515921_D47C17D4 X-CRM114-Status: GOOD ( 10.94 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP vmemmap_alloc_block() will no longer zero the block, so zero memory at its call sites for everything except struct pages. Struct page memory is zero'd by struct page initialization. Replace allocators in sprase-vmemmap to use the non-zeroing version. So, we will get the performance improvement by zeroing the memory in parallel when struct pages are zeroed. Signed-off-by: Pavel Tatashin Reviewed-by: Steven Sistare Reviewed-by: Daniel Jordan Reviewed-by: Bob Picco --- include/linux/mm.h | 11 +++++++++++ mm/sparse-vmemmap.c | 15 +++++++-------- mm/sparse.c | 6 +++--- 3 files changed, 21 insertions(+), 11 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index a7bba4ce79ba..25848764570f 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2501,6 +2501,17 @@ static inline void *vmemmap_alloc_block_buf(unsigned long size, int node) return __vmemmap_alloc_block_buf(size, node, NULL); } +static inline void *vmemmap_alloc_block_zero(unsigned long size, int node) +{ + void *p = vmemmap_alloc_block(size, node); + + if (!p) + return NULL; + memset(p, 0, size); + + return p; +} + void vmemmap_verify(pte_t *, int, unsigned long, unsigned long); int vmemmap_populate_basepages(unsigned long start, unsigned long end, int node); diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c index d1a39b8051e0..c2f5654e7c9d 100644 --- a/mm/sparse-vmemmap.c +++ b/mm/sparse-vmemmap.c @@ -41,7 +41,7 @@ static void * __ref __earlyonly_bootmem_alloc(int node, unsigned long align, unsigned long goal) { - return memblock_virt_alloc_try_nid(size, align, goal, + return memblock_virt_alloc_try_nid_raw(size, align, goal, BOOTMEM_ALLOC_ACCESSIBLE, node); } @@ -54,9 +54,8 @@ void * __meminit vmemmap_alloc_block(unsigned long size, int node) if (slab_is_available()) { struct page *page; - page = alloc_pages_node(node, - GFP_KERNEL | __GFP_ZERO | __GFP_RETRY_MAYFAIL, - get_order(size)); + page = alloc_pages_node(node, GFP_KERNEL | __GFP_RETRY_MAYFAIL, + get_order(size)); if (page) return page_address(page); return NULL; @@ -183,7 +182,7 @@ pmd_t * __meminit vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node) { pmd_t *pmd = pmd_offset(pud, addr); if (pmd_none(*pmd)) { - void *p = vmemmap_alloc_block(PAGE_SIZE, node); + void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node); if (!p) return NULL; pmd_populate_kernel(&init_mm, pmd, p); @@ -195,7 +194,7 @@ pud_t * __meminit vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node) { pud_t *pud = pud_offset(p4d, addr); if (pud_none(*pud)) { - void *p = vmemmap_alloc_block(PAGE_SIZE, node); + void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node); if (!p) return NULL; pud_populate(&init_mm, pud, p); @@ -207,7 +206,7 @@ p4d_t * __meminit vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node) { p4d_t *p4d = p4d_offset(pgd, addr); if (p4d_none(*p4d)) { - void *p = vmemmap_alloc_block(PAGE_SIZE, node); + void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node); if (!p) return NULL; p4d_populate(&init_mm, p4d, p); @@ -219,7 +218,7 @@ pgd_t * __meminit vmemmap_pgd_populate(unsigned long addr, int node) { pgd_t *pgd = pgd_offset_k(addr); if (pgd_none(*pgd)) { - void *p = vmemmap_alloc_block(PAGE_SIZE, node); + void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node); if (!p) return NULL; pgd_populate(&init_mm, pgd, p); diff --git a/mm/sparse.c b/mm/sparse.c index 83b3bf6461af..d22f51bb7c79 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -437,9 +437,9 @@ void __init sparse_mem_maps_populate_node(struct page **map_map, } size = PAGE_ALIGN(size); - map = memblock_virt_alloc_try_nid(size * map_count, - PAGE_SIZE, __pa(MAX_DMA_ADDRESS), - BOOTMEM_ALLOC_ACCESSIBLE, nodeid); + map = memblock_virt_alloc_try_nid_raw(size * map_count, + PAGE_SIZE, __pa(MAX_DMA_ADDRESS), + BOOTMEM_ALLOC_ACCESSIBLE, nodeid); if (map) { for (pnum = pnum_begin; pnum < pnum_end; pnum++) { if (!present_section_nr(pnum))