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Wed, 25 Feb 2026 20:31:22 -0500 X-MC-Unique: ofCRRh3zMdmxYyXmVy2o9g-1 X-Mimecast-MFC-AGG-ID: ofCRRh3zMdmxYyXmVy2o9g_1772069481 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id CCFE81956058; Thu, 26 Feb 2026 01:31:21 +0000 (UTC) Received: from h1.redhat.com (unknown [10.22.64.173]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id A826E3003D88; Thu, 26 Feb 2026 01:31:10 +0000 (UTC) From: Nico Pache To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: aarcange@redhat.com, akpm@linux-foundation.org, anshuman.khandual@arm.com, apopple@nvidia.com, baohua@kernel.org, baolin.wang@linux.alibaba.com, byungchul@sk.com, catalin.marinas@arm.com, cl@gentwo.org, corbet@lwn.net, dave.hansen@linux.intel.com, david@kernel.org, dev.jain@arm.com, gourry@gourry.net, hannes@cmpxchg.org, hughd@google.com, jackmanb@google.com, jack@suse.cz, jannh@google.com, jglisse@google.com, joshua.hahnjy@gmail.com, kas@kernel.org, lance.yang@linux.dev, Liam.Howlett@oracle.com, lorenzo.stoakes@oracle.com, mathieu.desnoyers@efficios.com, matthew.brost@intel.com, mhiramat@kernel.org, mhocko@suse.com, npache@redhat.com, peterx@redhat.com, pfalcato@suse.de, rakie.kim@sk.com, raquini@redhat.com, rdunlap@infradead.org, richard.weiyang@gmail.com, rientjes@google.com, rostedt@goodmis.org, rppt@kernel.org, ryan.roberts@arm.com, shivankg@amd.com, sunnanyong@huawei.com, surenb@google.com, thomas.hellstrom@linux.intel.com, tiwai@suse.de, usamaarif642@gmail.com, vbabka@suse.cz, vishal.moola@gmail.com, wangkefeng.wang@huawei.com, will@kernel.org, willy@infradead.org, yang@os.amperecomputing.com, ying.huang@linux.alibaba.com, ziy@nvidia.com, zokeefe@google.com Subject: [PATCH mm-unstable v2 4/5] mm/khugepaged: rename hpage_collapse_* to collapse_* Date: Wed, 25 Feb 2026 18:29:28 -0700 Message-ID: <20260226012929.169479-5-npache@redhat.com> In-Reply-To: <20260226012929.169479-1-npache@redhat.com> References: <20260226012929.169479-1-npache@redhat.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 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Content-Type: text/plain; charset="utf-8" The hpage_collapse functions describe functions used by madvise_collapse and khugepaged. remove the unnecessary hpage prefix to shorten the function name. Reviewed-by: Wei Yang Reviewed-by: Lance Yang Reviewed-by: Liam R. Howlett Reviewed-by: Zi Yan Reviewed-by: Baolin Wang Reviewed-by: Lorenzo Stoakes Acked-by: David Hildenbrand (Arm) Signed-off-by: Nico Pache Reviewed-by: Dev Jain --- mm/khugepaged.c | 71 +++++++++++++++++++++++-------------------------- mm/mremap.c | 2 +- 2 files changed, 35 insertions(+), 38 deletions(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 4615f34911d1..64086488ca01 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -392,14 +392,14 @@ void __init khugepaged_destroy(void) kmem_cache_destroy(mm_slot_cache); } =20 -static inline int hpage_collapse_test_exit(struct mm_struct *mm) +static inline int collapse_test_exit(struct mm_struct *mm) { return atomic_read(&mm->mm_users) =3D=3D 0; } =20 -static inline int hpage_collapse_test_exit_or_disable(struct mm_struct *mm) +static inline int collapse_test_exit_or_disable(struct mm_struct *mm) { - return hpage_collapse_test_exit(mm) || + return collapse_test_exit(mm) || mm_flags_test(MMF_DISABLE_THP_COMPLETELY, mm); } =20 @@ -433,7 +433,7 @@ void __khugepaged_enter(struct mm_struct *mm) int wakeup; =20 /* __khugepaged_exit() must not run from under us */ - VM_BUG_ON_MM(hpage_collapse_test_exit(mm), mm); + VM_BUG_ON_MM(collapse_test_exit(mm), mm); if (unlikely(mm_flags_test_and_set(MMF_VM_HUGEPAGE, mm))) return; =20 @@ -487,7 +487,7 @@ void __khugepaged_exit(struct mm_struct *mm) } else if (slot) { /* * This is required to serialize against - * hpage_collapse_test_exit() (which is guaranteed to run + * collapse_test_exit() (which is guaranteed to run * under mmap sem read mode). Stop here (after we return all * pagetables will be destroyed) until khugepaged has finished * working on the pagetables under the mmap_lock. @@ -582,7 +582,7 @@ static enum scan_result __collapse_huge_page_isolate(st= ruct vm_area_struct *vma, goto out; } =20 - /* See hpage_collapse_scan_pmd(). */ + /* See collapse_scan_pmd(). */ if (folio_maybe_mapped_shared(folio)) { ++shared; if (cc->is_khugepaged && @@ -833,7 +833,7 @@ static struct collapse_control khugepaged_collapse_cont= rol =3D { .is_khugepaged =3D true, }; =20 -static bool hpage_collapse_scan_abort(int nid, struct collapse_control *cc) +static bool collapse_scan_abort(int nid, struct collapse_control *cc) { int i; =20 @@ -868,7 +868,7 @@ static inline gfp_t alloc_hugepage_khugepaged_gfpmask(v= oid) } =20 #ifdef CONFIG_NUMA -static int hpage_collapse_find_target_node(struct collapse_control *cc) +static int collapse_find_target_node(struct collapse_control *cc) { int nid, target_node =3D 0, max_value =3D 0; =20 @@ -887,7 +887,7 @@ static int hpage_collapse_find_target_node(struct colla= pse_control *cc) return target_node; } #else -static int hpage_collapse_find_target_node(struct collapse_control *cc) +static int collapse_find_target_node(struct collapse_control *cc) { return 0; } @@ -906,7 +906,7 @@ static enum scan_result hugepage_vma_revalidate(struct = mm_struct *mm, unsigned l enum tva_type type =3D cc->is_khugepaged ? TVA_KHUGEPAGED : TVA_FORCED_COLLAPSE; =20 - if (unlikely(hpage_collapse_test_exit_or_disable(mm))) + if (unlikely(collapse_test_exit_or_disable(mm))) return SCAN_ANY_PROCESS; =20 *vmap =3D vma =3D find_vma(mm, address); @@ -977,7 +977,7 @@ static enum scan_result check_pmd_still_valid(struct mm= _struct *mm, =20 /* * Bring missing pages in from swap, to complete THP collapse. - * Only done if hpage_collapse_scan_pmd believes it is worthwhile. + * Only done if khugepaged_scan_pmd believes it is worthwhile. * * Called and returns without pte mapped or spinlocks held. * Returns result: if not SCAN_SUCCEED, mmap_lock has been released. @@ -1063,7 +1063,7 @@ static enum scan_result alloc_charge_folio(struct fol= io **foliop, struct mm_stru { gfp_t gfp =3D (cc->is_khugepaged ? alloc_hugepage_khugepaged_gfpmask() : GFP_TRANSHUGE); - int node =3D hpage_collapse_find_target_node(cc); + int node =3D collapse_find_target_node(cc); struct folio *folio; =20 folio =3D __folio_alloc(gfp, HPAGE_PMD_ORDER, node, &cc->alloc_nmask); @@ -1241,10 +1241,9 @@ static enum scan_result collapse_huge_page(struct mm= _struct *mm, unsigned long a return result; } =20 -static enum scan_result hpage_collapse_scan_pmd(struct mm_struct *mm, - struct vm_area_struct *vma, unsigned long start_addr, - bool *mmap_locked, unsigned int *cur_progress, - struct collapse_control *cc) +static enum scan_result collapse_scan_pmd(struct mm_struct *mm, + struct vm_area_struct *vma, unsigned long start_addr, bool *mmap_locked, + unsigned int *cur_progress, struct collapse_control *cc) { pmd_t *pmd; pte_t *pte, *_pte; @@ -1366,7 +1365,7 @@ static enum scan_result hpage_collapse_scan_pmd(struc= t mm_struct *mm, * hit record. */ node =3D folio_nid(folio); - if (hpage_collapse_scan_abort(node, cc)) { + if (collapse_scan_abort(node, cc)) { result =3D SCAN_SCAN_ABORT; goto out_unmap; } @@ -1432,7 +1431,7 @@ static void collect_mm_slot(struct mm_slot *slot) =20 lockdep_assert_held(&khugepaged_mm_lock); =20 - if (hpage_collapse_test_exit(mm)) { + if (collapse_test_exit(mm)) { /* free mm_slot */ hash_del(&slot->hash); list_del(&slot->mm_node); @@ -1787,7 +1786,7 @@ static void retract_page_tables(struct address_space = *mapping, pgoff_t pgoff) if (find_pmd_or_thp_or_none(mm, addr, &pmd) !=3D SCAN_SUCCEED) continue; =20 - if (hpage_collapse_test_exit(mm)) + if (collapse_test_exit(mm)) continue; =20 if (!file_backed_vma_is_retractable(vma)) @@ -2305,9 +2304,9 @@ static enum scan_result collapse_file(struct mm_struc= t *mm, unsigned long addr, return result; } =20 -static enum scan_result hpage_collapse_scan_file(struct mm_struct *mm, - unsigned long addr, struct file *file, pgoff_t start, - unsigned int *cur_progress, struct collapse_control *cc) +static enum scan_result collapse_scan_file(struct mm_struct *mm, unsigned = long addr, + struct file *file, pgoff_t start, unsigned int *cur_progress, + struct collapse_control *cc) { struct folio *folio =3D NULL; struct address_space *mapping =3D file->f_mapping; @@ -2362,7 +2361,7 @@ static enum scan_result hpage_collapse_scan_file(stru= ct mm_struct *mm, } =20 node =3D folio_nid(folio); - if (hpage_collapse_scan_abort(node, cc)) { + if (collapse_scan_abort(node, cc)) { result =3D SCAN_SCAN_ABORT; folio_put(folio); break; @@ -2418,7 +2417,7 @@ static enum scan_result hpage_collapse_scan_file(stru= ct mm_struct *mm, return result; } =20 -static unsigned int khugepaged_scan_mm_slot(unsigned int pages, enum scan_= result *result, +static unsigned int collapse_scan_mm_slot(unsigned int pages, enum scan_re= sult *result, struct collapse_control *cc) __releases(&khugepaged_mm_lock) __acquires(&khugepaged_mm_lock) @@ -2453,7 +2452,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned = int pages, enum scan_result goto breakouterloop_mmap_lock; =20 progress++; - if (unlikely(hpage_collapse_test_exit_or_disable(mm))) + if (unlikely(collapse_test_exit_or_disable(mm))) goto breakouterloop; =20 vma_iter_init(&vmi, mm, khugepaged_scan.address); @@ -2461,7 +2460,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned = int pages, enum scan_result unsigned long hstart, hend; =20 cond_resched(); - if (unlikely(hpage_collapse_test_exit_or_disable(mm))) { + if (unlikely(collapse_test_exit_or_disable(mm))) { progress++; break; } @@ -2484,7 +2483,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned = int pages, enum scan_result unsigned int cur_progress =3D 0; =20 cond_resched(); - if (unlikely(hpage_collapse_test_exit_or_disable(mm))) + if (unlikely(collapse_test_exit_or_disable(mm))) goto breakouterloop; =20 VM_BUG_ON(khugepaged_scan.address < hstart || @@ -2497,13 +2496,13 @@ static unsigned int khugepaged_scan_mm_slot(unsigne= d int pages, enum scan_result =20 mmap_read_unlock(mm); mmap_locked =3D false; - *result =3D hpage_collapse_scan_file(mm, + *result =3D collapse_scan_file(mm, khugepaged_scan.address, file, pgoff, &cur_progress, cc); fput(file); if (*result =3D=3D SCAN_PTE_MAPPED_HUGEPAGE) { mmap_read_lock(mm); - if (hpage_collapse_test_exit_or_disable(mm)) + if (collapse_test_exit_or_disable(mm)) goto breakouterloop; *result =3D try_collapse_pte_mapped_thp(mm, khugepaged_scan.address, false); @@ -2512,7 +2511,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned = int pages, enum scan_result mmap_read_unlock(mm); } } else { - *result =3D hpage_collapse_scan_pmd(mm, vma, + *result =3D collapse_scan_pmd(mm, vma, khugepaged_scan.address, &mmap_locked, &cur_progress, cc); } @@ -2546,7 +2545,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned = int pages, enum scan_result * Release the current mm_slot if this mm is about to die, or * if we scanned all vmas of this mm, or THP got disabled. */ - if (hpage_collapse_test_exit_or_disable(mm) || !vma) { + if (collapse_test_exit_or_disable(mm) || !vma) { /* * Make sure that if mm_users is reaching zero while * khugepaged runs here, khugepaged_exit will find @@ -2599,8 +2598,8 @@ static void khugepaged_do_scan(struct collapse_contro= l *cc) pass_through_head++; if (khugepaged_has_work() && pass_through_head < 2) - progress +=3D khugepaged_scan_mm_slot(pages - progress, - &result, cc); + progress +=3D collapse_scan_mm_slot(pages - progress, + &result, cc); else progress =3D pages; spin_unlock(&khugepaged_mm_lock); @@ -2844,8 +2843,7 @@ int madvise_collapse(struct vm_area_struct *vma, unsi= gned long start, mmap_read_unlock(mm); mmap_locked =3D false; *lock_dropped =3D true; - result =3D hpage_collapse_scan_file(mm, addr, file, pgoff, - NULL, cc); + result =3D collapse_scan_file(mm, addr, file, pgoff, NULL, cc); =20 if (result =3D=3D SCAN_PAGE_DIRTY_OR_WRITEBACK && !triggered_wb && mapping_can_writeback(file->f_mapping)) { @@ -2859,8 +2857,7 @@ int madvise_collapse(struct vm_area_struct *vma, unsi= gned long start, } fput(file); } else { - result =3D hpage_collapse_scan_pmd(mm, vma, addr, - &mmap_locked, NULL, cc); + result =3D collapse_scan_pmd(mm, vma, addr, &mmap_locked, NULL, cc); } if (!mmap_locked) *lock_dropped =3D true; diff --git a/mm/mremap.c b/mm/mremap.c index 2be876a70cc0..eb222af91c2d 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -244,7 +244,7 @@ static int move_ptes(struct pagetable_move_control *pmc, goto out; } /* - * Now new_pte is none, so hpage_collapse_scan_file() path can not find + * Now new_pte is none, so collapse_scan_file() path can not find * this by traversing file->f_mapping, so there is no concurrency with * retract_page_tables(). In addition, we already hold the exclusive * mmap_lock, so this new_pte page is stable, so there is no need to get --=20 2.53.0