From patchwork Mon May 6 08:46:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baolin Wang X-Patchwork-Id: 13655147 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 817EBC10F16 for ; Mon, 6 May 2024 08:47:03 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CBF5C6B0089; Mon, 6 May 2024 04:46:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C42106B008A; Mon, 6 May 2024 04:46:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A97096B008C; Mon, 6 May 2024 04:46:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 7B57B6B0089 for ; Mon, 6 May 2024 04:46:56 -0400 (EDT) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 38658A1589 for ; Mon, 6 May 2024 08:46:56 +0000 (UTC) X-FDA: 82087340832.08.6530EBC Received: from out30-99.freemail.mail.aliyun.com (out30-99.freemail.mail.aliyun.com [115.124.30.99]) by imf17.hostedemail.com (Postfix) with ESMTP id 303F040011 for ; Mon, 6 May 2024 08:46:53 +0000 (UTC) Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=linux.alibaba.com header.s=default header.b=Ub8G9q8o; spf=pass (imf17.hostedemail.com: domain of baolin.wang@linux.alibaba.com designates 115.124.30.99 as permitted sender) smtp.mailfrom=baolin.wang@linux.alibaba.com; dmarc=pass (policy=none) header.from=linux.alibaba.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1714985214; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=vbAZ9jfAMkqVV3Kg32TDOediCKK1trUe5zVBa6e0pWM=; b=y0c+MDK14YVFKPbSkMKOnmBS+Jmqc8Dxpt7eM3G/ca5hAiZfkmrdQOMBPn4M7SMcIS+Vkf 8lr9/ilsr8M8B4loRfDieLNb0utZWdHe+EJNNOLXJZqYaDUtMg6B//RdbyPgppKhEKcnC4 u91CCOI/ACDWhb+qSzBFDas5DydrnbI= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1714985214; a=rsa-sha256; cv=none; b=P2GAwUh14ZgfQpk+oEzoTPJDUSKs0SozeUx6JnBuQKW/fM7hd/KhBcisUz3tvgvqBctbAH kuvRoWNZ9vhdX9vzMOcAQKm8OJan9q0shkEyHXG0QRNiqLC5+q3mK/OP1q/UwTJ/uEqb7c eGfuc/XtGVsZGPl7jeF+W2wthSmGRk8= ARC-Authentication-Results: i=1; imf17.hostedemail.com; dkim=pass header.d=linux.alibaba.com header.s=default header.b=Ub8G9q8o; spf=pass (imf17.hostedemail.com: domain of baolin.wang@linux.alibaba.com designates 115.124.30.99 as permitted sender) smtp.mailfrom=baolin.wang@linux.alibaba.com; dmarc=pass (policy=none) header.from=linux.alibaba.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1714985211; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=vbAZ9jfAMkqVV3Kg32TDOediCKK1trUe5zVBa6e0pWM=; b=Ub8G9q8ogrbtZbAejVHsJaQ5hy3TmGBXla5qxvJxHTjlKWqFJdq+vSRTfo8cL7BU0MWwCfpiXQHF006MHYP4w7YgSWqBSnEkvT2MWgrKE2BOQ0sJPqXEX1oeWIIBpPK1Ln50/4/hTiHQXUUFp3/7id1wSawPSxzWNcGS/Bs9gzc= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R181e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033045046011;MF=baolin.wang@linux.alibaba.com;NM=1;PH=DS;RN=14;SR=0;TI=SMTPD_---0W5w3v7S_1714985209; Received: from localhost(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0W5w3v7S_1714985209) by smtp.aliyun-inc.com; Mon, 06 May 2024 16:46:50 +0800 From: Baolin Wang To: akpm@linux-foundation.org, hughd@google.com Cc: willy@infradead.org, david@redhat.com, ioworker0@gmail.com, wangkefeng.wang@huawei.com, ying.huang@intel.com, 21cnbao@gmail.com, ryan.roberts@arm.com, shy828301@gmail.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 5/8] mm: shmem: add multi-size THP sysfs interface for anonymous shmem Date: Mon, 6 May 2024 16:46:29 +0800 Message-Id: <6b4afed1ef26dbd08ae9ec58449b329564dcef3e.1714978902.git.baolin.wang@linux.alibaba.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: References: MIME-Version: 1.0 X-Rspam-User: X-Stat-Signature: 9yqnufi3wz4xg4x6a9byn8ybhkrhgdpn X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 303F040011 X-HE-Tag: 1714985213-146569 X-HE-Meta: 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 FVska/ew bu2Yt9zPIq93z0qSBXkR1eOglCMy0NGoPBX65O/KFs/AR2xcOYt2gC0vn1qJQrshQdFnp8cgcDJE7Jv9Wgot3p9HFfGE115LZU2eNlzIjKaM7Wrd1hVDBfErWPIpr49b73dRIl+zrTbraD91ste2gUb6WyukZ1++SW67BKFw5aCQF44/X4xyV01UCYo9p5Yzt+kAeNIoP9sbz8sUb80XXUa0y/SezP7Oy7Ej95wKh8SCSb+g= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: To support the use of mTHP with anonymous shmem, add a new sysfs interface 'shmem_enabled' in the '/sys/kernel/mm/transparent_hugepage/hugepages-kB/' directory for each mTHP to control whether shmem is enabled for that mTHP, with a value similar to the top level 'shmem_enabled', which can be set to: "always", "inherit (to inherit the top level setting)", "within_size", "advise", "never", "deny", "force". These values follow the same semantics as the top level, except the 'deny' is equivalent to 'never', and 'force' is equivalent to 'always' to keep compatibility. By default, PMD-sized hugepages have enabled="inherit" and all other hugepage sizes have enabled="never" for '/sys/kernel/mm/transparent_hugepage/hugepages-xxkB/shmem_enabled'. In addition, if top level value is 'force', then only PMD-sized hugepages have enabled="inherit", otherwise configuration will be failed and vice versa. That means now we will avoid using non-PMD sized THP to override the global huge allocation. Signed-off-by: Baolin Wang --- Documentation/admin-guide/mm/transhuge.rst | 29 +++++++ include/linux/huge_mm.h | 10 +++ mm/huge_memory.c | 11 +-- mm/shmem.c | 96 ++++++++++++++++++++++ 4 files changed, 138 insertions(+), 8 deletions(-) diff --git a/Documentation/admin-guide/mm/transhuge.rst b/Documentation/admin-guide/mm/transhuge.rst index 076443cc10a6..a28496e15bdb 100644 --- a/Documentation/admin-guide/mm/transhuge.rst +++ b/Documentation/admin-guide/mm/transhuge.rst @@ -332,6 +332,35 @@ deny force Force the huge option on for all - very useful for testing; +Anonymous shmem can also use "multi-size THP" (mTHP) by adding a new sysfs knob +to control mTHP allocation: /sys/kernel/mm/transparent_hugepage/hugepages-kB/shmem_enabled. +Its value for each mTHP is essentially consistent with the global setting, except +for the addition of 'inherit' to ensure compatibility with the global settings. +always + Attempt to allocate huge pages every time we need a new page; + +inherit + Inherit the top-level "shmem_enabled" value. By default, PMD-sized hugepages + have enabled="inherit" and all other hugepage sizes have enabled="never"; + +never + Do not allocate huge pages; + +within_size + Only allocate huge page if it will be fully within i_size. + Also respect fadvise()/madvise() hints; + +advise + Only allocate huge pages if requested with fadvise()/madvise(); + +deny + Has the same semantics as 'never', now mTHP allocation policy is only + used for anonymous shmem and no not override tmpfs. + +force + Has the same semantics as 'always', now mTHP allocation policy is only + used for anonymous shmem and no not override tmpfs. + Need of application restart =========================== diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index e49b56c40a11..dbd6b3f56210 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -6,6 +6,7 @@ #include #include /* only for vma_is_dax() */ +#include vm_fault_t do_huge_pmd_anonymous_page(struct vm_fault *vmf); int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, @@ -63,6 +64,7 @@ ssize_t single_hugepage_flag_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf, enum transparent_hugepage_flag flag); extern struct kobj_attribute shmem_enabled_attr; +extern struct kobj_attribute thpsize_shmem_enabled_attr; /* * Mask of all large folio orders supported for anonymous THP; all orders up to @@ -265,6 +267,14 @@ unsigned long thp_vma_allowable_orders(struct vm_area_struct *vma, return __thp_vma_allowable_orders(vma, vm_flags, tva_flags, orders); } +struct thpsize { + struct kobject kobj; + struct list_head node; + int order; +}; + +#define to_thpsize(kobj) container_of(kobj, struct thpsize, kobj) + enum mthp_stat_item { MTHP_STAT_ANON_FAULT_ALLOC, MTHP_STAT_ANON_FAULT_FALLBACK, diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 9efb6fefc391..d3080a8843f2 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -449,14 +449,6 @@ static void thpsize_release(struct kobject *kobj); static DEFINE_SPINLOCK(huge_anon_orders_lock); static LIST_HEAD(thpsize_list); -struct thpsize { - struct kobject kobj; - struct list_head node; - int order; -}; - -#define to_thpsize(kobj) container_of(kobj, struct thpsize, kobj) - static ssize_t thpsize_enabled_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { @@ -517,6 +509,9 @@ static struct kobj_attribute thpsize_enabled_attr = static struct attribute *thpsize_attrs[] = { &thpsize_enabled_attr.attr, +#ifdef CONFIG_SHMEM + &thpsize_shmem_enabled_attr.attr, +#endif NULL, }; diff --git a/mm/shmem.c b/mm/shmem.c index a383ea9a89a5..59cc26d44344 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -131,6 +131,14 @@ struct shmem_options { #define SHMEM_SEEN_QUOTA 32 }; +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +static unsigned long huge_anon_shmem_orders_always __read_mostly; +static unsigned long huge_anon_shmem_orders_madvise __read_mostly; +static unsigned long huge_anon_shmem_orders_inherit __read_mostly; +static unsigned long huge_anon_shmem_orders_within_size __read_mostly; +static DEFINE_SPINLOCK(huge_anon_shmem_orders_lock); +#endif + #ifdef CONFIG_TMPFS static unsigned long shmem_default_max_blocks(void) { @@ -4687,6 +4695,12 @@ void __init shmem_init(void) SHMEM_SB(shm_mnt->mnt_sb)->huge = shmem_huge; else shmem_huge = SHMEM_HUGE_NEVER; /* just in case it was patched */ + + /* + * Default to setting PMD-sized THP to inherit the global setting and + * disable all other multi-size THPs, when anonymous shmem uses mTHP. + */ + huge_anon_shmem_orders_inherit = BIT(HPAGE_PMD_ORDER); #endif return; @@ -4746,6 +4760,11 @@ static ssize_t shmem_enabled_store(struct kobject *kobj, huge != SHMEM_HUGE_NEVER && huge != SHMEM_HUGE_DENY) return -EINVAL; + /* Do not override huge allocation policy with non-PMD sized mTHP */ + if (huge == SHMEM_HUGE_FORCE && + huge_anon_shmem_orders_inherit != BIT(HPAGE_PMD_ORDER)) + return -EINVAL; + shmem_huge = huge; if (shmem_huge > SHMEM_HUGE_DENY) SHMEM_SB(shm_mnt->mnt_sb)->huge = shmem_huge; @@ -4753,6 +4772,83 @@ static ssize_t shmem_enabled_store(struct kobject *kobj, } struct kobj_attribute shmem_enabled_attr = __ATTR_RW(shmem_enabled); + +static ssize_t thpsize_shmem_enabled_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + int order = to_thpsize(kobj)->order; + const char *output; + + if (test_bit(order, &huge_anon_shmem_orders_always)) + output = "[always] inherit within_size advise never deny [force]"; + else if (test_bit(order, &huge_anon_shmem_orders_inherit)) + output = "always [inherit] within_size advise never deny force"; + else if (test_bit(order, &huge_anon_shmem_orders_within_size)) + output = "always inherit [within_size] advise never deny force"; + else if (test_bit(order, &huge_anon_shmem_orders_madvise)) + output = "always inherit within_size [advise] never deny force"; + else + output = "always inherit within_size advise [never] [deny] force"; + + return sysfs_emit(buf, "%s\n", output); +} + +static ssize_t thpsize_shmem_enabled_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + int order = to_thpsize(kobj)->order; + ssize_t ret = count; + + if (sysfs_streq(buf, "always") || sysfs_streq(buf, "force")) { + spin_lock(&huge_anon_shmem_orders_lock); + clear_bit(order, &huge_anon_shmem_orders_inherit); + clear_bit(order, &huge_anon_shmem_orders_madvise); + clear_bit(order, &huge_anon_shmem_orders_within_size); + set_bit(order, &huge_anon_shmem_orders_always); + spin_unlock(&huge_anon_shmem_orders_lock); + } else if (sysfs_streq(buf, "inherit")) { + /* Do not override huge allocation policy with non-PMD sized mTHP */ + if (shmem_huge == SHMEM_HUGE_FORCE && + order != HPAGE_PMD_ORDER) + return -EINVAL; + + spin_lock(&huge_anon_shmem_orders_lock); + clear_bit(order, &huge_anon_shmem_orders_always); + clear_bit(order, &huge_anon_shmem_orders_madvise); + clear_bit(order, &huge_anon_shmem_orders_within_size); + set_bit(order, &huge_anon_shmem_orders_inherit); + spin_unlock(&huge_anon_shmem_orders_lock); + } else if (sysfs_streq(buf, "within_size")) { + spin_lock(&huge_anon_shmem_orders_lock); + clear_bit(order, &huge_anon_shmem_orders_always); + clear_bit(order, &huge_anon_shmem_orders_inherit); + clear_bit(order, &huge_anon_shmem_orders_madvise); + set_bit(order, &huge_anon_shmem_orders_within_size); + spin_unlock(&huge_anon_shmem_orders_lock); + } else if (sysfs_streq(buf, "madvise")) { + spin_lock(&huge_anon_shmem_orders_lock); + clear_bit(order, &huge_anon_shmem_orders_always); + clear_bit(order, &huge_anon_shmem_orders_inherit); + clear_bit(order, &huge_anon_shmem_orders_within_size); + set_bit(order, &huge_anon_shmem_orders_madvise); + spin_unlock(&huge_anon_shmem_orders_lock); + } else if (sysfs_streq(buf, "never") || sysfs_streq(buf, "deny")) { + spin_lock(&huge_anon_shmem_orders_lock); + clear_bit(order, &huge_anon_shmem_orders_always); + clear_bit(order, &huge_anon_shmem_orders_inherit); + clear_bit(order, &huge_anon_shmem_orders_within_size); + clear_bit(order, &huge_anon_shmem_orders_madvise); + spin_unlock(&huge_anon_shmem_orders_lock); + } else { + ret = -EINVAL; + } + + return ret; +} + +struct kobj_attribute thpsize_shmem_enabled_attr = + __ATTR(shmem_enabled, 0644, thpsize_shmem_enabled_show, thpsize_shmem_enabled_store); #endif /* CONFIG_TRANSPARENT_HUGEPAGE && CONFIG_SYSFS */ #else /* !CONFIG_SHMEM */