From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-113.freemail.mail.aliyun.com (out30-113.freemail.mail.aliyun.com [115.124.30.113]) (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 2D58F1C9DF1 for ; Wed, 7 Aug 2024 07:31:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.113 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723015900; cv=none; b=pXLK9618tpbXjRGaZq+X5H71JxX1ASoovmX5iVn9FGUr13FqJ+LF/80SQ0szNodi1Z4g29W1eD01YPNddh9kk5/WfHG6n4oRA9VNZo/kUJd94TkNxTKisP3QGNLum5EyDo1qN/Dwp3hZs5Cbyo/7YHT9tWerrtr5FmPFKKbERR8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723015900; c=relaxed/simple; bh=u9rNPtYk720ssVEKO/QfyAhPgGcp45dwY7nlKRUHczU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=WiAGktlayy5ScHMqTyPtqGh0DhT5K31kE9ClPMvlgFBBTVuyxs8takIZ9Xx3qOgU35fI3fmpVYMvpE5j+FJfp+qiZLxn6/gLs30ITf98ajv3BKQV3OfQ3igFDdJkfBsghP/+JkpcqcplMHqHSXKVBFP98db4f5413dPID4VDhKc= 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=V0WVulDR; arc=none smtp.client-ip=115.124.30.113 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="V0WVulDR" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1723015897; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=HTq6ByUKYopHbBOucaa7TnUS458Ur1YounHQqWHqN9Y=; b=V0WVulDRA717tUNm1deCfVhvqRQBx7a4jGC4iVbOYbcLdbfJ/1mJaBqhXc15NXEEZXGG0z/9/NVA0CTiDp+Wlp8wcYDIH8b/9ZnoRHhd82sncLRPP7S0EgE1XGT+SsPx9qWB/77mww89STbvgWQaAoYEKlDvfRTRaULhJr9xYAM= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R391e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037067109;MF=baolin.wang@linux.alibaba.com;NM=1;PH=DS;RN=17;SR=0;TI=SMTPD_---0WCI3gik_1723015895; Received: from localhost(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0WCI3gik_1723015895) by smtp.aliyun-inc.com; Wed, 07 Aug 2024 15:31:35 +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 v4 08/10] mm: shmem: drop folio reference count using 'nr_pages' in shmem_delete_from_page_cache() Date: Wed, 7 Aug 2024 15:31:13 +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: 8bit 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 d94f02ad7bd1..345e25425e37 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -851,7 +851,7 @@ 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); } -- 2.39.3