From nobody Fri Dec 19 06:31:35 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 B8DD56F2E5 for ; Fri, 28 Jun 2024 03:07:26 +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=1719544046; cv=none; b=LpcKlatxlfArtflVyoSq2xf55pFU2NMFoU5Triz0LEtXOttVVC5/ybv5z4c9+QzNaZHpflT4DY2q2qAKzEDjE/WlcGR+j4aXHH8j8ePqzm8GnQlnPsS5VOctU5swsElTZS3BXTcmLQ6ThDiuD+3yndwBrl2syvDmdeB4hAi/K3E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719544046; c=relaxed/simple; bh=lrAcBtSPY8wF6yEhTYORr+zHxr4lEQSsuXyA2QNdVVw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qe5/+RauRDafjl/jVNhfBmaE8WJ91MUZg+SpQdZcJ777wtmuYtFslpuLH7NUAfZ/MSkhQsFZVk0jxFTFfQD3Ojlhzly9muVg2XGCP/XyQO41efJZ8IMcSoVS3CG1VbkoA4N5XfQW8YwOh9xr0t1YJEuhYrgfmzuQWIQhYANFvHE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OYpxeUZE; 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="OYpxeUZE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3DA8BC116B1; Fri, 28 Jun 2024 03:07:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719544046; bh=lrAcBtSPY8wF6yEhTYORr+zHxr4lEQSsuXyA2QNdVVw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OYpxeUZEAarVD5SnSCfgAbdk57grg3isCoQNmyTfbmHWGcxRADl1KA0GOLSwNsskB 1LQ/VpAl4JEWfjQiJXUpI80DZ98V1A82SK/ZeiZy4Dik+eGYGzuIR5W4BVCiaZ3uT6 Bp4+4/OlTxkjz2cxCoEmrLAnnozkhD8LBnhHpPn+mBir2MUoS3t31oZxuqRGdiXY9+ 7YHLfuEPWLEtKBZLqm2gMIR/DXTs7xnUEYLYYZ5m6qjLL0rczZzWptVCpk7eykyEof 41Hd/z51hpHJWSSAZXHTHQuNpIjqUI+MH33JNtZgqR8PQmPy0us8dObV2536bZ6yNP 03ZYClyRuJqKg== 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 10/20] mm/zsmalloc: add zpdesc_is_isolated/zpdesc_zone helper for zs_page_migrate Date: Fri, 28 Jun 2024 11:11:25 +0800 Message-ID: <20240628031138.429622-11-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> To convert page to zpdesc in zs_page_migrate(), we added zpdesc_is_isolated/zpdesc_zone helpers. No functional change. Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Signed-off-by: Alex Shi --- mm/zpdesc.h | 11 +++++++++++ mm/zsmalloc.c | 30 ++++++++++++++++-------------- 2 files changed, 27 insertions(+), 14 deletions(-) diff --git a/mm/zpdesc.h b/mm/zpdesc.h index f998d65c59d6..2e35b8220e05 100644 --- a/mm/zpdesc.h +++ b/mm/zpdesc.h @@ -98,4 +98,15 @@ static inline void __zpdesc_set_movable(struct zpdesc *z= pdesc, { __SetPageMovable(zpdesc_page(zpdesc), mops); } + +static inline bool zpdesc_is_isolated(struct zpdesc *zpdesc) +{ + return PageIsolated(zpdesc_page(zpdesc)); +} + +static inline struct zone *zpdesc_zone(struct zpdesc *zpdesc) +{ + return page_zone(zpdesc_page(zpdesc)); +} + #endif diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 3ef8e13fb9e6..251a6e63e58a 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1835,19 +1835,21 @@ static int zs_page_migrate(struct page *newpage, st= ruct page *page, struct size_class *class; struct zspage *zspage; struct zpdesc *dummy; + struct zpdesc *newzpdesc =3D page_zpdesc(newpage); + struct zpdesc *zpdesc =3D page_zpdesc(page); void *s_addr, *d_addr, *addr; unsigned int offset; unsigned long handle; unsigned long old_obj, new_obj; unsigned int obj_idx; =20 - VM_BUG_ON_PAGE(!PageIsolated(page), page); + VM_BUG_ON_PAGE(!zpdesc_is_isolated(zpdesc), zpdesc_page(zpdesc)); =20 /* We're committed, tell the world that this is a Zsmalloc page. */ - __SetPageZsmalloc(newpage); + __SetPageZsmalloc(zpdesc_page(newzpdesc)); =20 /* The page is locked, so this pointer must remain valid */ - zspage =3D get_zspage(page); + zspage =3D get_zspage(zpdesc_page(zpdesc)); pool =3D zspage->pool; =20 /* @@ -1864,30 +1866,30 @@ static int zs_page_migrate(struct page *newpage, st= ruct page *page, /* the migrate_write_lock protects zpage access via zs_map_object */ migrate_write_lock(zspage); =20 - offset =3D get_first_obj_offset(page); - s_addr =3D kmap_atomic(page); + offset =3D get_first_obj_offset(zpdesc_page(zpdesc)); + s_addr =3D zpdesc_kmap_atomic(zpdesc); =20 /* * Here, any user cannot access all objects in the zspage so let's move. */ - d_addr =3D kmap_atomic(newpage); + d_addr =3D zpdesc_kmap_atomic(newzpdesc); copy_page(d_addr, s_addr); kunmap_atomic(d_addr); =20 for (addr =3D s_addr + offset; addr < s_addr + PAGE_SIZE; addr +=3D class->size) { - if (obj_allocated(page_zpdesc(page), addr, &handle)) { + if (obj_allocated(zpdesc, addr, &handle)) { =20 old_obj =3D handle_to_obj(handle); obj_to_location(old_obj, &dummy, &obj_idx); - new_obj =3D (unsigned long)location_to_obj(newpage, + new_obj =3D (unsigned long)location_to_obj(zpdesc_page(newzpdesc), obj_idx); record_obj(handle, new_obj); } } kunmap_atomic(s_addr); =20 - replace_sub_page(class, zspage, page_zpdesc(newpage), page_zpdesc(page)); + replace_sub_page(class, zspage, newzpdesc, zpdesc); /* * Since we complete the data copy and set up new zspage structure, * it's okay to release migration_lock. @@ -1896,14 +1898,14 @@ static int zs_page_migrate(struct page *newpage, st= ruct page *page, spin_unlock(&class->lock); migrate_write_unlock(zspage); =20 - get_page(newpage); - if (page_zone(newpage) !=3D page_zone(page)) { - dec_zone_page_state(page, NR_ZSPAGES); - inc_zone_page_state(newpage, NR_ZSPAGES); + zpdesc_get(newzpdesc); + if (zpdesc_zone(newzpdesc) !=3D zpdesc_zone(zpdesc)) { + zpdesc_dec_zone_page_state(zpdesc); + zpdesc_inc_zone_page_state(newzpdesc); } =20 reset_page(page); - put_page(page); + zpdesc_put(zpdesc); =20 return MIGRATEPAGE_SUCCESS; } --=20 2.43.0