https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=279308
Bug ID: 279308
Summary: mdmfs does not work as documented
Product: Base System
Version: 14.0-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: bin
Assignee: b...@freebsd.org
Reporter: rozhuk...@gmail.com
https://man.freebsd.org/cgi/man.cgi?query=mdmfs&sektion=8&apropos=0&manpath=FreeBSD+14.0-RELEASE+and+Ports
Say:
> Create and mount a 16 megabyte malloc-backed file system on /tmp using
> the /dev/md1 device; furthermore, do not use soft-updates on
> it and
> mount it async:
>
> mdmfs -M -S -o async -s 16m md1 /tmp
But soft updates enabled and no "async".
# mdmfs -M -S -o async -s 16m md1 /media
# mount
/dev/md1 on /media (ufs, local, soft-updates)
# tunefs -p /dev/md1
tunefs: POSIX.1e ACLs: (-a) disabled
tunefs: NFSv4 ACLs: (-N) disabled
tunefs: MAC multilabel: (-l) disabled
tunefs: soft updates: (-n) enabled
tunefs: soft update journaling: (-j) disabled
tunefs: gjournal: (-J) disabled
tunefs: trim: (-t) disabled
tunefs: maximum blocks per file in a cylinder group: (-e) 4096
tunefs: average file size: (-f) 16384
tunefs: average number of files in a directory: (-s) 64
tunefs: minimum percentage of free space: (-m) 8%
tunefs: space to hold for metadata blocks: (-k) 40
tunefs: optimization preference: (-o) time
tunefs: volume label: (-L)
# mount -v
/dev/md1 on /media (ufs, local, soft-updates, writes: sync 2 async 0, reads:
sync 3 async 0, fsid 1572526616e23f74, vnodes: count 2 )
# uname -a
FreeBSD rimwksv 14.1-STABLE FreeBSD 14.1-STABLE RIM_WKS amd64
Also, IMHO, -t should be forced for all memory backend mount points.
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