From nobody Wed Dec 17 12:15:59 2025 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (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 BF8431A8F61 for ; Tue, 18 Mar 2025 06:10:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742278237; cv=none; b=f8eknoM2kpKrJLMhbJurSR5ZW0voSOaLiJdGptG2ZqDT2YDHtJ1bLowuoEkNN4t2LC2A/YdxpbWbwFScF9OSLf3/Y9mMCfOe2FgdnhR30MfyTA55qp4kT0H/zA+LEallK5VDsVNM01OYKKERKSbguiLJ6KeQowwCs28Ji4iNI7o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742278237; c=relaxed/simple; bh=oqna5Rz45Q4X3GnawdekU8NIig5uLs/LkUqyBRC0S9Y=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=V0LHLfTgATizeTUmvYaiUUxBcgF7WRnW53MTCudDATJBW1Sxg6JMP6mSnQu+9QUP3B63m2h6LuVDJrz/oLD0Pc8PAv4hrIfmyjWm1+bIewZeOw2BjJCLj1gE1x0ussocsn9JSjJFkFvGM+WmgojCu2MgxPjVwc72dJF3cmHR1Kg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4ZH1f85Kd0z4f3m6S for ; Tue, 18 Mar 2025 14:10:08 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.75]) by mail.maildlp.com (Postfix) with ESMTP id D37C31A1BCD for ; Tue, 18 Mar 2025 14:10:32 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.101.6]) by APP2 (Coremail) with SMTP id Syh0CgD3AGRVDtln65ErGw--.37695S9; Tue, 18 Mar 2025 14:10:32 +0800 (CST) From: Kemeng Shi To: akpm@linux-foundation.org Cc: tim.c.chen@linux.intel.com, ryncsn@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 7/8] mm: swap: factor out helper to drop cache of entries within a single cluster Date: Tue, 18 Mar 2025 23:06:13 +0800 Message-Id: <20250318150614.6415-8-shikemeng@huaweicloud.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20250318150614.6415-1-shikemeng@huaweicloud.com> References: <20250318150614.6415-1-shikemeng@huaweicloud.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-CM-TRANSID: Syh0CgD3AGRVDtln65ErGw--.37695S9 X-Coremail-Antispam: 1UD129KBjvJXoW7uFWkAFy8JF13WF4UXFy7Wrg_yoW8Zr43pF 9Igwn8KF48Xr13Gw4xXw45JaySv3yxWw1UXFy7Gw13Z3Z3Jr10gFyqyrWavry5Crykur98 Ca4ktry2gF1jyF7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPab4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M280x2IEY4vEnII2IxkI6r1a6r45M2 8IrcIa0xkI8VA2jI8067AKxVWUAVCq3wA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAv FVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVW7JVWDJw A2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE 3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr2 1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv 67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lc7CjxVAaw2 AFwI0_JF0_Jw1l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAq x4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r 1DMIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_JFI_Gr1lIxAIcVC0I7IYx2IY6xkF 7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxV WUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjxU s3kuDUUUU X-CM-SenderInfo: 5vklyvpphqwq5kxd4v5lfo033gof0z/ Content-Type: text/plain; charset="utf-8" Factor out helper swap_entries_put_cache() from put_swap_folio() to server as a general-purpose routine for dropping cache flag of entries within a single cluster. Signed-off-by: Kemeng Shi Reviewed-by: Tim Chen --- mm/swapfile.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) diff --git a/mm/swapfile.c b/mm/swapfile.c index 370509eb2f1f..919daaa3922a 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -1455,6 +1455,21 @@ struct swap_info_struct *get_swap_device(swp_entry_t= entry) return NULL; } =20 +static void swap_entries_put_cache(struct swap_info_struct *si, + swp_entry_t entry, int nr) +{ + unsigned long offset =3D swp_offset(entry); + struct swap_cluster_info *ci; + + ci =3D lock_cluster(si, offset); + if (swap_only_has_cache(si, offset, nr)) + swap_entries_free(si, ci, entry, nr); + else + for (int i =3D 0; i < nr; i++, entry.val++) + swap_entry_put_locked(si, ci, entry, SWAP_HAS_CACHE); + unlock_cluster(ci); +} + static bool swap_entries_put_map(struct swap_info_struct *si, swp_entry_t entry, int nr) { @@ -1588,8 +1603,6 @@ void swap_free_nr(swp_entry_t entry, int nr_pages) */ void put_swap_folio(struct folio *folio, swp_entry_t entry) { - unsigned long offset =3D swp_offset(entry); - struct swap_cluster_info *ci; struct swap_info_struct *si; int size =3D 1 << swap_entry_order(folio_order(folio)); =20 @@ -1597,13 +1610,7 @@ void put_swap_folio(struct folio *folio, swp_entry_t= entry) if (!si) return; =20 - ci =3D lock_cluster(si, offset); - if (swap_only_has_cache(si, offset, size)) - swap_entries_free(si, ci, entry, size); - else - for (int i =3D 0; i < size; i++, entry.val++) - swap_entry_put_locked(si, ci, entry, SWAP_HAS_CACHE); - unlock_cluster(ci); + swap_entries_put_cache(si, entry, size); } =20 int __swap_count(swp_entry_t entry) --=20 2.30.0