From owner-svn-src-head@freebsd.org Tue Jan 7 04:33:15 2020 Return-Path: Delivered-To: svn-src-head@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 60D271FB370; Tue, 7 Jan 2020 04:33:15 +0000 (UTC) (envelope-from delphij@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 47sKHv20ZKz4fnH; Tue, 7 Jan 2020 04:33:15 +0000 (UTC) (envelope-from delphij@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 3FEAE217BD; Tue, 7 Jan 2020 04:33:15 +0000 (UTC) (envelope-from delphij@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 0074XFmZ038366; Tue, 7 Jan 2020 04:33:15 GMT (envelope-from delphij@FreeBSD.org) Received: (from delphij@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 0074XF0f038365; Tue, 7 Jan 2020 04:33:15 GMT (envelope-from delphij@FreeBSD.org) Message-Id: <202001070433.0074XF0f038365@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: delphij set sender to delphij@FreeBSD.org using -f From: Xin LI Date: Tue, 7 Jan 2020 04:33:15 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r356434 - head/sbin/fsck_msdosfs X-SVN-Group: head X-SVN-Commit-Author: delphij X-SVN-Commit-Paths: head/sbin/fsck_msdosfs X-SVN-Commit-Revision: 356434 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 07 Jan 2020 04:33:15 -0000 Author: delphij Date: Tue Jan 7 04:33:14 2020 New Revision: 356434 URL: https://svnweb.freebsd.org/changeset/base/356434 Log: fsck_msdosfs.8: document -M. Reported by: mckusick Reviewed by: mckusick, emaste, bcr MFC after: 28 days X-MFC-with: r356313 Differential Revision: https://reviews.freebsd.org/D23049 Modified: head/sbin/fsck_msdosfs/fsck_msdosfs.8 Modified: head/sbin/fsck_msdosfs/fsck_msdosfs.8 ============================================================================== --- head/sbin/fsck_msdosfs/fsck_msdosfs.8 Tue Jan 7 04:30:49 2020 (r356433) +++ head/sbin/fsck_msdosfs/fsck_msdosfs.8 Tue Jan 7 04:33:14 2020 (r356434) @@ -25,7 +25,7 @@ .\" .\" $FreeBSD$ .\" -.Dd October 3, 2016 +.Dd January 6, 2020 .Dt FSCK_MSDOSFS 8 .Os .Sh NAME @@ -37,7 +37,7 @@ .Op Fl Cf .Ar filesystem ... .Nm -.Op Fl Cny +.Op Fl CMny .Ar filesystem ... .Sh DESCRIPTION The @@ -84,6 +84,21 @@ which seeks to determine whether the file system needs immediately in foreground, or if its cleaning can be deferred to background. FAT (MS-DOS) file systems must always be cleaned in the foreground. A non-zero exit code is always returned for this option. +.It Fl M +Causes +.Nm +to not use +.Xr mmap 2 +when checking a FAT32 file system. +This option is mainly for debugging purposes and is not normally necessary. +The +.Nm +utility will automatically fall back to use a simple LRU cache of 4 MiB +when it failed to perform +.Xr mmap 2 , +or when +.Fl M +is specified. .It Fl f Force .Nm