From patchwork Fri May 8 12:23:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Konstantin Khlebnikov X-Patchwork-Id: 11536429 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 58300912 for ; Fri, 8 May 2020 12:23:32 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2519A208D6 for ; Fri, 8 May 2020 12:23:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=yandex-team.ru header.i=@yandex-team.ru header.b="Dudi4cnw" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2519A208D6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=yandex-team.ru Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E0284900006; Fri, 8 May 2020 08:23:29 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id D65C9900002; Fri, 8 May 2020 08:23:29 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C0651900006; Fri, 8 May 2020 08:23:29 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0050.hostedemail.com [216.40.44.50]) by kanga.kvack.org (Postfix) with ESMTP id A7386900002 for ; Fri, 8 May 2020 08:23:29 -0400 (EDT) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 786B7160CD for ; Fri, 8 May 2020 12:23:29 +0000 (UTC) X-FDA: 76793467338.25.work95_5893f56556223 X-Spam-Summary: 2,0,0,dcd9fe1ed41c16f8,d41d8cd98f00b204,khlebnikov@yandex-team.ru,,RULES_HIT:41:152:355:379:800:960:988:989:1260:1277:1311:1313:1314:1345:1359:1437:1515:1516:1518:1534:1541:1593:1594:1711:1730:1747:1777:1792:2393:2559:2562:2898:3138:3139:3140:3141:3142:3352:3865:3868:3871:4321:5007:6120:6261:6653:7901:9207:10004:10400:11026:11473:11658:11914:12043:12048:12114:12297:12438:12517:12519:12555:12760:12986:13069:13311:13357:14096:14097:14181:14394:14687:14721:14922:21080:21451:21627:21660:30054:30070,0,RBL:77.88.29.217:@yandex-team.ru:.lbl8.mailshell.net-66.100.201.201 62.2.3.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: work95_5893f56556223 X-Filterd-Recvd-Size: 3603 Received: from forwardcorp1p.mail.yandex.net (forwardcorp1p.mail.yandex.net [77.88.29.217]) by imf20.hostedemail.com (Postfix) with ESMTP for ; Fri, 8 May 2020 12:23:28 +0000 (UTC) Received: from mxbackcorp1g.mail.yandex.net (mxbackcorp1g.mail.yandex.net [IPv6:2a02:6b8:0:1402::301]) by forwardcorp1p.mail.yandex.net (Yandex) with ESMTP id C19C22E158B; Fri, 8 May 2020 15:23:26 +0300 (MSK) Received: from myt4-18a966dbd9be.qloud-c.yandex.net (myt4-18a966dbd9be.qloud-c.yandex.net [2a02:6b8:c00:12ad:0:640:18a9:66db]) by mxbackcorp1g.mail.yandex.net (mxbackcorp/Yandex) with ESMTP id CMbOpsqaf5-NPAKSseD; Fri, 08 May 2020 15:23:26 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru; s=default; t=1588940606; bh=gAc8zimgDuqoVSCzjYmfsuvcNfaJdwfxgsEnXz43eRQ=; h=In-Reply-To:Message-ID:References:Date:To:From:Subject:Cc; b=Dudi4cnwJ7t5xj12iPVVfiBK1+NBPLvmfgEDa3uLI21UMZu+g4jxgwiqUQzMkFq2L 2yptU+ynirEEliWdMzQntV7Y9Uj6YtqlJQnZGHLdge2EEphAu+qaE/aZodpzCOKE8z PfrjiH4Ms99VevQrQltHSx3Ij7B4tUi8LDePTgvM= Authentication-Results: mxbackcorp1g.mail.yandex.net; dkim=pass header.i=@yandex-team.ru Received: from dynamic-vpn.dhcp.yndx.net (dynamic-vpn.dhcp.yndx.net [2a02:6b8:b080:7008::1:4]) by myt4-18a966dbd9be.qloud-c.yandex.net (smtpcorp/Yandex) with ESMTPSA id rgqNvxq2Fn-NPWiN7wm; Fri, 08 May 2020 15:23:25 +0300 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client certificate not present) Subject: [PATCH RFC 5/8] dcache: add action D_WALK_SKIP_SIBLINGS to d_walk() From: Konstantin Khlebnikov To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Alexander Viro Cc: Waiman Long Date: Fri, 08 May 2020 15:23:25 +0300 Message-ID: <158894060525.200862.12478833917149869939.stgit@buzz> In-Reply-To: <158893941613.200862.4094521350329937435.stgit@buzz> References: <158893941613.200862.4094521350329937435.stgit@buzz> User-Agent: StGit/0.22-32-g6a05 MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This lets skip remaining siblings at seeing d_is_tail_negative(). Signed-off-by: Konstantin Khlebnikov --- fs/dcache.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/dcache.c b/fs/dcache.c index 743255773cc7..44c6832d21d6 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1303,12 +1303,14 @@ EXPORT_SYMBOL(shrink_dcache_sb); * @D_WALK_QUIT: quit walk * @D_WALK_NORETRY: quit when retry is needed * @D_WALK_SKIP: skip this dentry and its children + * @D_WALK_SKIP_SIBLINGS: skip siblings and their children */ enum d_walk_ret { D_WALK_CONTINUE, D_WALK_QUIT, D_WALK_NORETRY, D_WALK_SKIP, + D_WALK_SKIP_SIBLINGS, }; /** @@ -1339,6 +1341,7 @@ static void d_walk(struct dentry *parent, void *data, break; case D_WALK_QUIT: case D_WALK_SKIP: + case D_WALK_SKIP_SIBLINGS: goto out_unlock; case D_WALK_NORETRY: retry = false; @@ -1370,6 +1373,9 @@ static void d_walk(struct dentry *parent, void *data, case D_WALK_SKIP: spin_unlock(&dentry->d_lock); continue; + case D_WALK_SKIP_SIBLINGS: + spin_unlock(&dentry->d_lock); + goto skip_siblings; } if (!list_empty(&dentry->d_subdirs)) { @@ -1381,6 +1387,7 @@ static void d_walk(struct dentry *parent, void *data, } spin_unlock(&dentry->d_lock); } +skip_siblings: /* * All done at this level ... ascend and resume the search. */