From nobody Wed Dec 17 03:03:11 2025 Received: from out30-110.freemail.mail.aliyun.com (out30-110.freemail.mail.aliyun.com [115.124.30.110]) (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 2A7C3811FE for ; Tue, 18 Jun 2024 06:54:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.110 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718693681; cv=none; b=B/ECWyu92vQFqmmkkdDd2CyM7XinXrG+t/Dofl6YwJHwvGy5oy5XG8BmL82iQSwphlmQTTXWspofgWPS/XaTCWYpmkOyDPoSNsmMg8xq5igtQKYxDJErwYrBScgfw1R4gyDwpSHauGfpy3aeL3pgjpSL8SCPyClQcnt4CUzb7x0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718693681; c=relaxed/simple; bh=oVnV3o1DiHJTJv/4w0ienh3h1L9X2UkzNvbAiS7nYa4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=CZ/FFDfoCEEgJEro7KZyyAlj4arr8nTMlwvTyBV2xELfY2/39jbOS1Sfm3yINN60LRxZwHMMSz8nOuITm+XUIvVNyKUYk9APk3E2/QL7tJqq3e7IzAQwq7xJaqfHdNcMq8YvsKtbiAJiERqFKrSuKmKuOsugW52E7K5DYjg1SAU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=CgkwSa/o; arc=none smtp.client-ip=115.124.30.110 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="CgkwSa/o" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1718693677; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=BtIWGiPeiPtgyrkhSZFohxCr8LroRfij9iZfhgtdvvw=; b=CgkwSa/ooabLtWd/cLwAJuu20RX1FEuE9lSzNYgBr2taB5xDtS28QXDFYEn8NeopdM2Z+Xr50q1ABEZcIQuX5K+cpA2Q9OSpaUI2//4vHdzfZw2gLJ7BEBIUMVIl8MHK6cxqdNM3TFf6mZvJNQ7Av0Rexzf3vQXkoBeLfsrVE+U= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R101e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033068173054;MF=baolin.wang@linux.alibaba.com;NM=1;PH=DS;RN=17;SR=0;TI=SMTPD_---0W8jFFMY_1718693675; Received: from localhost(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0W8jFFMY_1718693675) by smtp.aliyun-inc.com; Tue, 18 Jun 2024 14:54:35 +0800 From: Baolin Wang To: akpm@linux-foundation.org, hughd@google.com Cc: willy@infradead.org, david@redhat.com, wangkefeng.wang@huawei.com, chrisl@kernel.org, ying.huang@intel.com, 21cnbao@gmail.com, ryan.roberts@arm.com, shy828301@gmail.com, ziy@nvidia.com, ioworker0@gmail.com, da.gomez@samsung.com, p.raghav@samsung.com, baolin.wang@linux.alibaba.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 8/9] mm: shmem: drop folio reference count using 'nr_pages' in shmem_delete_from_page_cache() Date: Tue, 18 Jun 2024 14:54:20 +0800 Message-Id: X-Mailer: git-send-email 2.39.3 In-Reply-To: References: 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" To support large folio swapin/swapout for shmem in the following patches, drop the folio's reference count by the number of pages contained in the folio when a shmem folio is deleted from shmem pagecache after adding into swap cache. Signed-off-by: Baolin Wang --- mm/shmem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/shmem.c b/mm/shmem.c index c0a9253f3a99..9a35ee7e7f40 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -831,7 +831,7 @@ static void shmem_delete_from_page_cache(struct folio *= folio, void *radswap) __lruvec_stat_mod_folio(folio, NR_FILE_PAGES, -nr); __lruvec_stat_mod_folio(folio, NR_SHMEM, -nr); xa_unlock_irq(&mapping->i_pages); - folio_put(folio); + folio_put_refs(folio, nr); BUG_ON(error); } =20 --=20 2.39.3