From nobody Fri Dec 19 20:54:16 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 6254140858 for ; Tue, 6 Aug 2024 02:18:17 +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=1722910697; cv=none; b=f+nui5EP3S7pGz3NslH9kiDk1Hcb4OTKaWJUwkHBY2CxqEEpR0qMR6WjbIy9Rq7pyFu4qbN/NtUraXwkmJk7zr/RUxXHSdpSYTsyhB1pLUrj1MxBB/iEcKikp3/PLD1pfTC0VXqT0cGjPcCO39xV9opDjx8p1i+oJQNzPtAyY48= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722910697; c=relaxed/simple; bh=Hcz6YDLKpn+zwSbhAqxdxpFHMpHIDCe8idbfi+gvSSM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WHqKTxKx7fFEbwHka0F6KXdfGso75U3EC3f/LRUCpXiXTmBH9Pm2Cv65mGWFA9GLFfHDQigMSoBRS1e1fhRTd7RV5nlpSJyu1ihyS/BGlczmjdvN0zbkp97AzTwYEDgvl7o+dFCVprwdmW5d8OCvvN6XuDg8Am31s0DwvL6CKSA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CNjv4Yt9; 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="CNjv4Yt9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1EF94C4AF0B; Tue, 6 Aug 2024 02:18:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722910697; bh=Hcz6YDLKpn+zwSbhAqxdxpFHMpHIDCe8idbfi+gvSSM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CNjv4Yt9eT8l1U83xyPDy6BZuirk5dnxQU81nTlT/y5ULIt1rjedy+R5ACeEBWVBi VjVKk5NmdQP/WWEUzGqrzT/Ogyykzw74HoNE1d2Bb7YfG/8xWI5ax3dCf6Xr7roZDJ Dk0iu3z0Ib7D4ATLidLr6RPt6z1oEzNj6mPt1ao36Kolg7F5BG4mpOYNep/gw6xur2 NfdoPAuQsnTHxwzxtvJfi1g/1TMDQVBATGFt2nKp1jWMG6DhjD9cuTQKfitgFhUrXi I8gLccD4SMhAWkrUe+LA6YXXw2sZJsJLCqF2lkEQ87ruSuH8FI/KSKK6CgG2hLMUbn LHxQHsK6dtWzQ== 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 v5 06/21] mm/zsmalloc: convert create_page_chain() and its users to use zpdesc Date: Tue, 6 Aug 2024 10:22:53 +0800 Message-ID: <20240806022311.3924442-7-alexs@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240806022311.3924442-1-alexs@kernel.org> References: <20240806022143.3924396-1-alexs@kernel.org> <20240806022311.3924442-1-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 Introduce a few helper functions for conversion to convert create_page_chai= n() to use zpdesc, then use zpdesc in replace_sub_page() too. Originally-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Signed-off-by: Alex Shi --- mm/zpdesc.h | 6 ++++ mm/zsmalloc.c | 95 ++++++++++++++++++++++++++++++--------------------- 2 files changed, 62 insertions(+), 39 deletions(-) diff --git a/mm/zpdesc.h b/mm/zpdesc.h index 2101de23d16d..6a01e09e4beb 100644 --- a/mm/zpdesc.h +++ b/mm/zpdesc.h @@ -107,4 +107,10 @@ static inline struct zpdesc *pfn_zpdesc(unsigned long = pfn) { return page_zpdesc(pfn_to_page(pfn)); } + +static inline void __zpdesc_set_movable(struct zpdesc *zpdesc, + const struct movable_operations *mops) +{ + __SetPageMovable(zpdesc_page(zpdesc), mops); +} #endif diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 7421d7678880..33a4f7d026e3 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -248,6 +248,21 @@ static inline void *zpdesc_kmap_atomic(struct zpdesc *= zpdesc) return kmap_atomic(zpdesc_page(zpdesc)); } =20 +static inline void zpdesc_set_first(struct zpdesc *zpdesc) +{ + SetPagePrivate(zpdesc_page(zpdesc)); +} + +static inline void zpdesc_inc_zone_page_state(struct zpdesc *zpdesc) +{ + inc_zone_page_state(zpdesc_page(zpdesc), NR_ZSPAGES); +} + +static inline void zpdesc_dec_zone_page_state(struct zpdesc *zpdesc) +{ + dec_zone_page_state(zpdesc_page(zpdesc), NR_ZSPAGES); +} + struct zspage { struct { unsigned int huge:HUGE_BITS; @@ -954,35 +969,35 @@ static void init_zspage(struct size_class *class, str= uct zspage *zspage) } =20 static void create_page_chain(struct size_class *class, struct zspage *zsp= age, - struct page *pages[]) + struct zpdesc *zpdescs[]) { int i; - struct page *page; - struct page *prev_page =3D NULL; - int nr_pages =3D class->pages_per_zspage; + struct zpdesc *zpdesc; + struct zpdesc *prev_zpdesc =3D NULL; + int nr_zpdescs =3D class->pages_per_zspage; =20 /* * Allocate individual pages and link them together as: - * 1. all pages are linked together using page->index - * 2. each sub-page point to zspage using page->private + * 1. all pages are linked together using zpdesc->next + * 2. each sub-page point to zspage using zpdesc->zspage * - * we set PG_private to identify the first page (i.e. no other sub-page + * we set PG_private to identify the first zpdesc (i.e. no other zpdesc * has this flag set). */ - for (i =3D 0; i < nr_pages; i++) { - page =3D pages[i]; - set_page_private(page, (unsigned long)zspage); - page->index =3D 0; + for (i =3D 0; i < nr_zpdescs; i++) { + zpdesc =3D zpdescs[i]; + zpdesc->zspage =3D zspage; + zpdesc->next =3D NULL; if (i =3D=3D 0) { - zspage->first_zpdesc =3D page_zpdesc(page); - SetPagePrivate(page); + zspage->first_zpdesc =3D zpdesc; + zpdesc_set_first(zpdesc); if (unlikely(class->objs_per_zspage =3D=3D 1 && class->pages_per_zspage =3D=3D 1)) SetZsHugePage(zspage); } else { - prev_page->index =3D (unsigned long)page; + prev_zpdesc->next =3D zpdesc; } - prev_page =3D page; + prev_zpdesc =3D zpdesc; } } =20 @@ -994,7 +1009,7 @@ static struct zspage *alloc_zspage(struct zs_pool *poo= l, gfp_t gfp) { int i; - struct page *pages[ZS_MAX_PAGES_PER_ZSPAGE]; + struct zpdesc *zpdescs[ZS_MAX_PAGES_PER_ZSPAGE]; struct zspage *zspage =3D cache_alloc_zspage(pool, gfp); =20 if (!zspage) @@ -1004,25 +1019,25 @@ static struct zspage *alloc_zspage(struct zs_pool *= pool, migrate_lock_init(zspage); =20 for (i =3D 0; i < class->pages_per_zspage; i++) { - struct page *page; + struct zpdesc *zpdesc; =20 - page =3D alloc_page(gfp); - if (!page) { + zpdesc =3D page_zpdesc(alloc_page(gfp)); + if (!zpdesc) { while (--i >=3D 0) { - dec_zone_page_state(pages[i], NR_ZSPAGES); - __ClearPageZsmalloc(pages[i]); - __free_page(pages[i]); + zpdesc_dec_zone_page_state(zpdescs[i]); + __ClearPageZsmalloc(zpdesc_page(zpdescs[i])); + __free_page(zpdesc_page(zpdescs[i])); } cache_free_zspage(pool, zspage); return NULL; } - __SetPageZsmalloc(page); + __SetPageZsmalloc(zpdesc_page(zpdesc)); =20 - inc_zone_page_state(page, NR_ZSPAGES); - pages[i] =3D page; + zpdesc_inc_zone_page_state(zpdesc); + zpdescs[i] =3D zpdesc; } =20 - create_page_chain(class, zspage, pages); + create_page_chain(class, zspage, zpdescs); init_zspage(class, zspage); zspage->pool =3D pool; zspage->class =3D class->index; @@ -1753,26 +1768,28 @@ static void migrate_write_unlock(struct zspage *zsp= age) static const struct movable_operations zsmalloc_mops; =20 static void replace_sub_page(struct size_class *class, struct zspage *zspa= ge, - struct page *newpage, struct page *oldpage) + struct zpdesc *newzpdesc, struct zpdesc *oldzpdesc) { - struct page *page; - struct page *pages[ZS_MAX_PAGES_PER_ZSPAGE] =3D {NULL, }; + struct zpdesc *zpdesc; + struct zpdesc *zpdescs[ZS_MAX_PAGES_PER_ZSPAGE] =3D {NULL, }; + unsigned int first_obj_offset; int idx =3D 0; =20 - page =3D get_first_page(zspage); + zpdesc =3D get_first_zpdesc(zspage); do { - if (page =3D=3D oldpage) - pages[idx] =3D newpage; + if (zpdesc =3D=3D oldzpdesc) + zpdescs[idx] =3D newzpdesc; else - pages[idx] =3D page; + zpdescs[idx] =3D zpdesc; idx++; - } while ((page =3D get_next_page(page)) !=3D NULL); + } while ((zpdesc =3D get_next_zpdesc(zpdesc)) !=3D NULL); =20 - create_page_chain(class, zspage, pages); - set_first_obj_offset(newpage, get_first_obj_offset(oldpage)); + 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); if (unlikely(ZsHugePage(zspage))) - newpage->index =3D oldpage->index; - __SetPageMovable(newpage, &zsmalloc_mops); + newzpdesc->handle =3D oldzpdesc->handle; + __zpdesc_set_movable(newzpdesc, &zsmalloc_mops); } =20 static bool zs_page_isolate(struct page *page, isolate_mode_t mode) @@ -1845,7 +1862,7 @@ static int zs_page_migrate(struct page *newpage, stru= ct page *page, } kunmap_atomic(s_addr); =20 - replace_sub_page(class, zspage, newpage, page); + replace_sub_page(class, zspage, page_zpdesc(newpage), page_zpdesc(page)); /* * Since we complete the data copy and set up new zspage structure, * it's okay to release migration_lock. --=20 2.43.0