Date: Fri, 29 Apr 2011 23:00:23 +0000 (UTC) From: Dag-Erling Smorgrav <des@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sbin/fsck_ffs fsck.h fsck_ffs.8 fsutil.c main.c pass5.c Message-ID: <201104292300.p3TN0hej068236@repoman.freebsd.org>
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des 2011-04-29 23:00:23 UTC
FreeBSD src repository
Modified files:
sbin/fsck_ffs fsck.h fsck_ffs.8 fsutil.c main.c pass5.c
Log:
SVN rev 221233 on 2011-04-29 23:00:23Z by des
Add an -E option to mirror newfs's. The idea is that if you have a system
that was built before ffs grew support for TRIM, your filesystem will have
plenty of free blocks that the flash chip doesn't know are free, so it
can't take advantage of them for wear leveling. Once you've upgraded your
kernel, you enable TRIM on the filesystem (tunefs -t enable), then run
fsck_ffs -E on it before mounting it.
I tested this patch by half-filling an mdconfig'ed filesystem image,
running fsck_ffs -E on it, then verifying that the contents were not
damaged by comparing them to a pristine copy using rsync's checksum
functionality. There is no reliable way to test it on real hardware.
Many thanks to mckusick@, who provided the tricky parts of this patch and
reviewed the final version.
Reviewed by: mckusick@
MFC after: 3 weeks
Revision Changes Path
1.47 +2 -0 src/sbin/fsck_ffs/fsck.h
1.46 +20 -2 src/sbin/fsck_ffs/fsck_ffs.8
1.32 +16 -1 src/sbin/fsck_ffs/fsutil.c
1.64 +6 -2 src/sbin/fsck_ffs/main.c
1.47 +23 -2 src/sbin/fsck_ffs/pass5.c
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