From nobody Fri Dec 19 06:31:31 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 EA92B4436B for ; Fri, 28 Jun 2024 03:07:51 +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=1719544072; cv=none; b=MWWMwTg9Y46NX9HPAJ8JbDR2uuPMZ9NhNZc3X15T2T8Tpv2gkFdIqVzDHarZJxNEBKfrFNDE7/+bnJT+Ro5HAvc2UeSNF5MpuNBB2y7/UMgZhTp52SVKsNSdiUWVlLHD1F6Kl1BmfIAXz4tB7SbIICW5ci/5vceunO7Cm/RAa3A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719544072; c=relaxed/simple; bh=BULUfQtc3EjNlGEEdYDtph/07BaO7bkwBtlyH1/5iBg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gNKW02bl5r4NmwajdZokq1llqdSOOph3X1G+kSVzkaP06YTtukssBBxJJBTlve/h6FGICw6yccSC6+NPC9cUiBy238QWv4sRab1xPgKbFF+hGPYm5suPyWzJFuR5hFvjF3GlpLOtUffba+iXDJU7NjWM9SgN1RKtlDQYMGAHYUI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Kn8GoGgZ; 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="Kn8GoGgZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C7603C116B1; Fri, 28 Jun 2024 03:07:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719544071; bh=BULUfQtc3EjNlGEEdYDtph/07BaO7bkwBtlyH1/5iBg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Kn8GoGgZJ1gvzJR2ncaJOTr4cft0ptFYqqqvbtAwTpCfjfvz4TvWV5uAi2Eez6HFe fKUWmp/Ts+D6L4Djx91kxmxRNiKIpJnkx8+z1/ZcZdL8U1zcxymua+7Gi4mAGVdSPM JORUVVR6FgEOCUCxesPq43knn7yJph28Reeb3A8CaTzJ0LJYlKmw1JaZJKOtO85Pce R/zlvqlS7vVfrxk14GzwY82GipQfBVN9n7LaPjttYrKJmpNLAq4aXSGvIaD6Gh5t+u QRlJ7PvfPSXp5TlA6TInbxbPPsrHJyyGJD7s2T5vpgnRSaqu8yy/uWEXSp7AbPLic2 7bibTnUJh3iLA== 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 Cc: Alex Shi Subject: [PATCH 17/20] mm/zsmalloc: convert get/set_first_obj_offset() to take zpdesc Date: Fri, 28 Jun 2024 11:11:32 +0800 Message-ID: <20240628031138.429622-18-alexs@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240628031138.429622-1-alexs@kernel.org> References: <20240628031138.429622-1-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: Hyeonggon Yoo <42.hyeyoo@gmail.com> 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 | 3 +++ mm/zsmalloc.c | 32 ++++++++++++++++---------------- 2 files changed, 19 insertions(+), 16 deletions(-) diff --git a/mm/zpdesc.h b/mm/zpdesc.h index 186ff9711ffb..17941774c46e 100644 --- a/mm/zpdesc.h +++ b/mm/zpdesc.h @@ -14,6 +14,7 @@ * @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 * * This struct overlays struct page for now. Do not modify without a good * understanding of the issues. @@ -29,6 +30,7 @@ struct zpdesc { unsigned long handle; }; struct zspage *zspage; + unsigned int first_obj_offset; }; #define ZPDESC_MATCH(pg, zp) \ static_assert(offsetof(struct page, pg) =3D=3D offsetof(struct zpdesc, zp= )) @@ -38,6 +40,7 @@ ZPDESC_MATCH(lru, lru); ZPDESC_MATCH(index, next); ZPDESC_MATCH(index, handle); ZPDESC_MATCH(private, zspage); +ZPDESC_MATCH(page_type, first_obj_offset); #undef ZPDESC_MATCH static_assert(sizeof(struct zpdesc) <=3D sizeof(struct page)); =20 diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 951292dbcae4..3ce49f0372cc 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -496,26 +496,26 @@ 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) @@ -852,7 +852,7 @@ 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 @@ -936,7 +936,7 @@ 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); @@ -1593,7 +1593,7 @@ 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) { @@ -1789,8 +1789,8 @@ 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); @@ -1845,7 +1845,7 @@ 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