From nobody Fri Dec 19 04:07:46 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4E393153598 for ; Mon, 29 Jul 2024 11:21:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722252073; cv=none; b=MQi1C2NIo0yS4oE0pu51g/8ajtWPRlF0aG5T9+6tsVWdCDEYoVOVe8tfLQJaq2sDqm0MyWGJqjgg0BLfjWOnpsogb+SA+LZB6mld4leY1nrAf1NvMByFZUTEgg2Pe8cpBSu5j16Lkd/WPLOW5CQahMpFXKkfQuXQJhJwr15WGYs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722252073; c=relaxed/simple; bh=Itfg7R6iNeKIMJsSCXaa7VK0PRdQ2psxEdNvilX7MGw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GRTFBgbKpAa64+MLGPA3EcBvI404/hwZWHu6toQ03uIGnuKWcFDt+CSG5D6nFa3nL1VHy9e7uqhehNdWo57C92NQg/K3k2nY4dNXRQZvZmRRLCpTaqyAwVV20SaZPqZ/c0xv9RdeBZ8asmO7GjLVJnRfI6IjQPH+XyaLnlmHPvo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WKtVL170; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WKtVL170" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 693D1C4AF11; Mon, 29 Jul 2024 11:21:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722252073; bh=Itfg7R6iNeKIMJsSCXaa7VK0PRdQ2psxEdNvilX7MGw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WKtVL170fOP1O4XLSDWo1F250iq5RJ80EenjRyd7ZFOT2WvuJuInoIyx92SwRS7Cc pbrGzXYKmIIAT4QtnvMB8ThaarUUedL3E5+TlS+UtYM+YJsxN2p5XSlso+e1SHSb5M xTUP2ijw2w7jJF69q2NiOoesk4j1NPgHOtJ1w0TS2tjj2RqoWf5SEtWI/DS+hgTA/t jwIzd+zFQpYJUj4XC3xJkx35hp9rlt9Ju0MpE+vnq/J8BM6koz0K0BkDwwpac68UpE 0W/f4fyzHaM9zCNTqtvtVyYatxW07+UpA2zA8fi8x/CPXDjyEwZFw9NR4VBwQLbWRv TGyKYh/tyozJw== From: alexs@kernel.org To: Vitaly Wool , Miaohe Lin , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, minchan@kernel.org, willy@infradead.org, senozhatsky@chromium.org, david@redhat.com, 42.hyeyoo@gmail.com, Yosry Ahmed , nphamcs@gmail.com Cc: Alex Shi Subject: [PATCH v4 17/22] mm/zsmalloc: convert get/set_first_obj_offset() to take zpdesc Date: Mon, 29 Jul 2024 19:25:29 +0800 Message-ID: <20240729112534.3416707-18-alexs@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240729112534.3416707-1-alexs@kernel.org> References: <20240729112534.3416707-1-alexs@kernel.org> 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" From: Alex Shi Now that all users of get/set_first_obj_offset() are converted to use zpdesc, convert them to take zpdesc. Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Signed-off-by: Alex Shi --- mm/zpdesc.h | 7 ++++++- mm/zsmalloc.c | 36 ++++++++++++++++++------------------ 2 files changed, 24 insertions(+), 19 deletions(-) diff --git a/mm/zpdesc.h b/mm/zpdesc.h index 72c8c072b4c8..f64e813f4847 100644 --- a/mm/zpdesc.h +++ b/mm/zpdesc.h @@ -15,6 +15,8 @@ * @next: Next zpdesc in a zspage in zsmalloc zpool * @handle: For huge zspage in zsmalloc zpool * @zspage: Pointer to zspage in zsmalloc + * @first_obj_offset: First object offset in zsmalloc zpool + * @_refcount: Indirectly use by page migration * @memcg_data: Memory Control Group data. * * This struct overlays struct page for now. Do not modify without a good @@ -31,7 +33,8 @@ struct zpdesc { unsigned long handle; }; struct zspage *zspage; - unsigned long _zp_pad_1; + unsigned int first_obj_offset; + atomic_t _refcount; #ifdef CONFIG_MEMCG unsigned long memcg_data; #endif @@ -45,6 +48,8 @@ ZPDESC_MATCH(mapping, mops); ZPDESC_MATCH(index, next); ZPDESC_MATCH(index, handle); ZPDESC_MATCH(private, zspage); +ZPDESC_MATCH(page_type, first_obj_offset); +ZPDESC_MATCH(_refcount, _refcount); #ifdef CONFIG_MEMCG ZPDESC_MATCH(memcg_data, memcg_data); #endif diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 8b713ac03902..bb8b5f13a966 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -20,8 +20,8 @@ * zpdesc->next: links together all component pages of a zspage * For the huge page, this is always 0, so we use this field * to store handle. - * page->page_type: PG_zsmalloc, lower 16 bit locate the first object - * offset in a subpage of a zspage + * zpdesc->first_obj_offset: PG_zsmalloc, lower 16 bit locate the first + * object offset in a subpage of a zspage * * Usage of struct zpdesc(page) flags: * PG_private: identifies the first component page @@ -494,26 +494,26 @@ static struct zpdesc *get_first_zpdesc(struct zspage = *zspage) =20 #define FIRST_OBJ_PAGE_TYPE_MASK 0xffff =20 -static inline void reset_first_obj_offset(struct page *page) +static inline void reset_first_obj_offset(struct zpdesc *zpdesc) { - VM_WARN_ON_ONCE(!PageZsmalloc(page)); - page->page_type |=3D FIRST_OBJ_PAGE_TYPE_MASK; + VM_WARN_ON_ONCE(!PageZsmalloc(zpdesc_page(zpdesc))); + zpdesc->first_obj_offset |=3D FIRST_OBJ_PAGE_TYPE_MASK; } =20 -static inline unsigned int get_first_obj_offset(struct page *page) +static inline unsigned int get_first_obj_offset(struct zpdesc *zpdesc) { - VM_WARN_ON_ONCE(!PageZsmalloc(page)); - return page->page_type & FIRST_OBJ_PAGE_TYPE_MASK; + VM_WARN_ON_ONCE(!PageZsmalloc(zpdesc_page(zpdesc))); + return zpdesc->first_obj_offset & FIRST_OBJ_PAGE_TYPE_MASK; } =20 -static inline void set_first_obj_offset(struct page *page, unsigned int of= fset) +static inline void set_first_obj_offset(struct zpdesc *zpdesc, unsigned in= t offset) { /* With 16 bit available, we can support offsets into 64 KiB pages. */ BUILD_BUG_ON(PAGE_SIZE > SZ_64K); - VM_WARN_ON_ONCE(!PageZsmalloc(page)); + VM_WARN_ON_ONCE(!PageZsmalloc(zpdesc_page(zpdesc))); VM_WARN_ON_ONCE(offset & ~FIRST_OBJ_PAGE_TYPE_MASK); - page->page_type &=3D ~FIRST_OBJ_PAGE_TYPE_MASK; - page->page_type |=3D offset & FIRST_OBJ_PAGE_TYPE_MASK; + zpdesc->first_obj_offset &=3D ~FIRST_OBJ_PAGE_TYPE_MASK; + zpdesc->first_obj_offset |=3D offset & FIRST_OBJ_PAGE_TYPE_MASK; } =20 static inline unsigned int get_freeobj(struct zspage *zspage) @@ -850,7 +850,7 @@ static void reset_zpdesc(struct zpdesc *zpdesc) ClearPagePrivate(page); zpdesc->zspage =3D NULL; zpdesc->next =3D NULL; - reset_first_obj_offset(page); + reset_first_obj_offset(zpdesc); __ClearPageZsmalloc(page); } =20 @@ -934,7 +934,7 @@ static void init_zspage(struct size_class *class, struc= t zspage *zspage) struct link_free *link; void *vaddr; =20 - set_first_obj_offset(zpdesc_page(zpdesc), off); + set_first_obj_offset(zpdesc, off); =20 vaddr =3D zpdesc_kmap_atomic(zpdesc); link =3D (struct link_free *)vaddr + off / sizeof(*link); @@ -1589,7 +1589,7 @@ static unsigned long find_alloced_obj(struct size_cla= ss *class, unsigned long handle =3D 0; void *addr =3D zpdesc_kmap_atomic(zpdesc); =20 - offset =3D get_first_obj_offset(zpdesc_page(zpdesc)); + offset =3D get_first_obj_offset(zpdesc); offset +=3D class->size * index; =20 while (offset < PAGE_SIZE) { @@ -1784,8 +1784,8 @@ static void replace_sub_page(struct size_class *class= , struct zspage *zspage, } while ((zpdesc =3D get_next_zpdesc(zpdesc)) !=3D NULL); =20 create_page_chain(class, zspage, zpdescs); - first_obj_offset =3D get_first_obj_offset(zpdesc_page(oldzpdesc)); - set_first_obj_offset(zpdesc_page(newzpdesc), first_obj_offset); + first_obj_offset =3D get_first_obj_offset(oldzpdesc); + set_first_obj_offset(newzpdesc, first_obj_offset); if (unlikely(ZsHugePage(zspage))) newzpdesc->handle =3D oldzpdesc->handle; __zpdesc_set_movable(newzpdesc, &zsmalloc_mops); @@ -1840,7 +1840,7 @@ static int zs_page_migrate(struct page *newpage, stru= ct page *page, /* the migrate_write_lock protects zpage access via zs_map_object */ migrate_write_lock(zspage); =20 - offset =3D get_first_obj_offset(zpdesc_page(zpdesc)); + offset =3D get_first_obj_offset(zpdesc); s_addr =3D zpdesc_kmap_atomic(zpdesc); =20 /* --=20 2.43.0