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| author | Xin LI <delphij@FreeBSD.org> | 2020-01-07 04:33:14 +0000 |
|---|---|---|
| committer | Xin LI <delphij@FreeBSD.org> | 2020-01-07 04:33:14 +0000 |
| commit | 9a67c570a9143d554cf19898259cdb21cac704d5 (patch) | |
| tree | 5436d4f50613ab7021861bc7d4dc164594544f9f /sbin/fsck_msdosfs/fsck_msdosfs.8 | |
| parent | 37fe521a6fa7df760758e84a95cd41561011c736 (diff) | |
| download | src-9a67c570a9143d554cf19898259cdb21cac704d5.tar.gz src-9a67c570a9143d554cf19898259cdb21cac704d5.zip | |
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
Notes
Notes:
svn path=/head/; revision=356434
Diffstat (limited to 'sbin/fsck_msdosfs/fsck_msdosfs.8')
| -rw-r--r-- | sbin/fsck_msdosfs/fsck_msdosfs.8 | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/sbin/fsck_msdosfs/fsck_msdosfs.8 b/sbin/fsck_msdosfs/fsck_msdosfs.8 index f953dbdf2b8f..602451b61374 100644 --- a/sbin/fsck_msdosfs/fsck_msdosfs.8 +++ b/sbin/fsck_msdosfs/fsck_msdosfs.8 @@ -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 to be cleaned 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 |