From nobody Tue Feb 10 09:22:18 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 4F241207DF1 for ; Mon, 16 Dec 2024 16:51:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734367919; cv=none; b=VO3DKMtHJlxE6QEsjyGIT0ulbAEG5IrQQnASR1f62fbYkQT352rjhHI4MBn42IQACc83jR2O31kfkJfj5kCSUStmB6pxegQSKhSR/Rq4TBiGve75a2L2WTnnD2bme6tLzqNfKMPHDSTuPDKrn2PttTMqq94QW9dOx1yWPox1aN8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734367919; c=relaxed/simple; bh=mq5qjwjE+ui40jJfnEACvGFzl1xWmIFAoM5IxTU3rAA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=dN852zo271KdHfcf24Z5svPg7YkwcAVgdH1Z9crboYlINhheKTDaCWFAbCwjNh2YUr0RnHBQMd0kz36tMz0mBppLwG7nJag+5V8VFSYDbWHmsLYUWGjvSiB5gaJq3S92vs2IdYMefn68HJBCWYjhUlQJ4FqRlN1SNgDovUB1vBk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C211B1692; Mon, 16 Dec 2024 08:52:24 -0800 (PST) Received: from K4MQJ0H1H2.arm.com (unknown [10.163.78.212]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 0E60D3F528; Mon, 16 Dec 2024 08:51:45 -0800 (PST) From: Dev Jain To: akpm@linux-foundation.org, david@redhat.com, willy@infradead.org, kirill.shutemov@linux.intel.com Cc: ryan.roberts@arm.com, anshuman.khandual@arm.com, catalin.marinas@arm.com, cl@gentwo.org, vbabka@suse.cz, mhocko@suse.com, apopple@nvidia.com, dave.hansen@linux.intel.com, will@kernel.org, baohua@kernel.org, jack@suse.cz, srivatsa@csail.mit.edu, haowenchao22@gmail.com, hughd@google.com, aneesh.kumar@kernel.org, yang@os.amperecomputing.com, peterx@redhat.com, ioworker0@gmail.com, wangkefeng.wang@huawei.com, ziy@nvidia.com, jglisse@google.com, surenb@google.com, vishal.moola@gmail.com, zokeefe@google.com, zhengqi.arch@bytedance.com, jhubbard@nvidia.com, 21cnbao@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Dev Jain Subject: [RFC PATCH 02/12] khugepaged: Generalize alloc_charge_folio() Date: Mon, 16 Dec 2024 22:20:55 +0530 Message-Id: <20241216165105.56185-3-dev.jain@arm.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20241216165105.56185-1-dev.jain@arm.com> References: <20241216165105.56185-1-dev.jain@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Pass order to alloc_charge_folio() and update mTHP statistics. Signed-off-by: Dev Jain --- include/linux/huge_mm.h | 2 ++ mm/huge_memory.c | 4 ++++ mm/khugepaged.c | 13 +++++++++---- 3 files changed, 15 insertions(+), 4 deletions(-) diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 93e509b6c00e..8b6d0fed99b3 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -119,6 +119,8 @@ enum mthp_stat_item { MTHP_STAT_ANON_FAULT_ALLOC, MTHP_STAT_ANON_FAULT_FALLBACK, MTHP_STAT_ANON_FAULT_FALLBACK_CHARGE, + MTHP_STAT_ANON_COLLAPSE_ALLOC, + MTHP_STAT_ANON_COLLAPSE_ALLOC_FAILED, MTHP_STAT_ZSWPOUT, MTHP_STAT_SWPIN, MTHP_STAT_SWPIN_FALLBACK, diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 2da5520bfe24..2e582fad4c77 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -615,6 +615,8 @@ static struct kobj_attribute _name##_attr =3D __ATTR_RO= (_name) DEFINE_MTHP_STAT_ATTR(anon_fault_alloc, MTHP_STAT_ANON_FAULT_ALLOC); DEFINE_MTHP_STAT_ATTR(anon_fault_fallback, MTHP_STAT_ANON_FAULT_FALLBACK); DEFINE_MTHP_STAT_ATTR(anon_fault_fallback_charge, MTHP_STAT_ANON_FAULT_FAL= LBACK_CHARGE); +DEFINE_MTHP_STAT_ATTR(anon_collapse_alloc, MTHP_STAT_ANON_COLLAPSE_ALLOC); +DEFINE_MTHP_STAT_ATTR(anon_collapse_alloc_failed, MTHP_STAT_ANON_COLLAPSE_= ALLOC_FAILED); DEFINE_MTHP_STAT_ATTR(zswpout, MTHP_STAT_ZSWPOUT); DEFINE_MTHP_STAT_ATTR(swpin, MTHP_STAT_SWPIN); DEFINE_MTHP_STAT_ATTR(swpin_fallback, MTHP_STAT_SWPIN_FALLBACK); @@ -636,6 +638,8 @@ static struct attribute *anon_stats_attrs[] =3D { &anon_fault_alloc_attr.attr, &anon_fault_fallback_attr.attr, &anon_fault_fallback_charge_attr.attr, + &anon_collapse_alloc_attr.attr, + &anon_collapse_alloc_failed_attr.attr, #ifndef CONFIG_SHMEM &zswpout_attr.attr, &swpin_attr.attr, diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 95643e6e5f31..02cd424b8e48 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1073,21 +1073,26 @@ static int __collapse_huge_page_swapin(struct mm_st= ruct *mm, } =20 static int alloc_charge_folio(struct folio **foliop, struct mm_struct *mm, - struct collapse_control *cc) + int order, struct collapse_control *cc) { gfp_t gfp =3D (cc->is_khugepaged ? alloc_hugepage_khugepaged_gfpmask() : GFP_TRANSHUGE); int node =3D hpage_collapse_find_target_node(cc); struct folio *folio; =20 - folio =3D __folio_alloc(gfp, HPAGE_PMD_ORDER, node, &cc->alloc_nmask); + folio =3D __folio_alloc(gfp, order, node, &cc->alloc_nmask); if (!folio) { *foliop =3D NULL; count_vm_event(THP_COLLAPSE_ALLOC_FAILED); + if (order !=3D HPAGE_PMD_ORDER) + count_mthp_stat(order, MTHP_STAT_ANON_COLLAPSE_ALLOC_FAILED); return SCAN_ALLOC_HUGE_PAGE_FAIL; } =20 count_vm_event(THP_COLLAPSE_ALLOC); + if (order !=3D HPAGE_PMD_ORDER) + count_mthp_stat(order, MTHP_STAT_ANON_COLLAPSE_ALLOC); + if (unlikely(mem_cgroup_charge(folio, mm, gfp))) { folio_put(folio); *foliop =3D NULL; @@ -1124,7 +1129,7 @@ static int collapse_huge_page(struct mm_struct *mm, u= nsigned long address, */ mmap_read_unlock(mm); =20 - result =3D alloc_charge_folio(&folio, mm, cc); + result =3D alloc_charge_folio(&folio, mm, order, cc); if (result !=3D SCAN_SUCCEED) goto out_nolock; =20 @@ -1850,7 +1855,7 @@ static int collapse_file(struct mm_struct *mm, unsign= ed long addr, VM_BUG_ON(!IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS) && !is_shmem); VM_BUG_ON(start & (HPAGE_PMD_NR - 1)); =20 - result =3D alloc_charge_folio(&new_folio, mm, cc); + result =3D alloc_charge_folio(&new_folio, mm, HPAGE_PMD_ORDER, cc); if (result !=3D SCAN_SUCCEED) goto out; =20 --=20 2.30.2