From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0EB8CC282E1 for ; Fri, 24 May 2019 08:06:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CB1E021841 for ; Fri, 24 May 2019 08:06:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="o0Dk7f3+"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="kE4NYJ/h" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389429AbfEXIGj (ORCPT ); Fri, 24 May 2019 04:06:39 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:45050 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389046AbfEXIGi (ORCPT ); Fri, 24 May 2019 04:06:38 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id BC43F60E40; Fri, 24 May 2019 08:06:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1558685196; bh=HFahEd1e9otwuYSiHy1qPYvBNA3cY2td10pq593gtdw=; h=From:To:Cc:Subject:Date:From; b=o0Dk7f3+hdz7aLAyaH+W2bwHvC2BB+Qo7wch7/PP9JDnDkcfeQL3QIBvBweFT/5Hw XS8fzRC1wLadBfl4wxjqJ5IZEcUs6TlNd1ZqDXwBc6gawFGgTgvx6XRoSSGAyTR9fy Sa6xsgNpqk6Jyk005JTE9Rkg7+Prbf5tR/gJmIIM= Received: from codeaurora.org (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: stummala@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 3FC7C60716; Fri, 24 May 2019 08:06:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1558685195; bh=HFahEd1e9otwuYSiHy1qPYvBNA3cY2td10pq593gtdw=; h=From:To:Cc:Subject:Date:From; b=kE4NYJ/hbdpoJMFmQboUNCozSkfLhIstHc2jckprU6iCfY++FGxUi0PuBJuCb2yGb 72EfNaAjfosSNFJm6llDdqSxPceH2w1ay4QaS73iKcXMWqbjCRmejXDuPzVug4udpX gB9LczQo46sRD5H9Llx+DAkvtItJUD1AnpKIzayM= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 3FC7C60716 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=stummala@codeaurora.org From: Sahitya Tummala To: Andrew Morton , Kirill Tkhai , Michal Hocko , Johannes Weiner , Vladimir Davydov , Yafang Shao , Roman Gushchin , Mel Gorman , linux-mm@kvack.org, "Theodore Y. Ts'o" , Jaegeuk Kim , Eric Biggers , linux-fscrypt@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Sahitya Tummala Subject: [PATCH] mm/vmscan.c: drop all inode/dentry cache from LRU Date: Fri, 24 May 2019 13:36:01 +0530 Message-Id: <1558685161-860-1-git-send-email-stummala@codeaurora.org> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is important for the scenario where FBE (file based encryption) is enabled. With FBE, the encryption context needed to en/decrypt a file will be stored in inode and any inode that is left in the cache after drop_caches is done will be a problem. For ex, in Android, drop_caches will be used when switching work profiles. Signed-off-by: Sahitya Tummala --- mm/vmscan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index d96c547..b48926f 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -730,7 +730,7 @@ void drop_slab_node(int nid) do { freed += shrink_slab(GFP_KERNEL, nid, memcg, 0); } while ((memcg = mem_cgroup_iter(NULL, memcg, NULL)) != NULL); - } while (freed > 10); + } while (freed != 0); } void drop_slab(void) -- Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.