linux-ext4 - [PATCH 0/7] e2fprogs: online scrub & compiler fun

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Date:   Thu, 01 Mar 2018 10:23:29 -0800
From:   "Darrick J. Wong" <darrick.wong@...cle.com>
To:     tytso@....edu, darrick.wong@...cle.com
Cc:     djwong@...nel.org, linux-ext4@...r.kernel.org
Subject: [PATCH 0/7] e2fprogs: online scrub & compiler fun

Hi all,

Here's some new stuff for e2fsprogs 1.45!  The first three patches in
this series formalize the e2croncheck contrib script into an e2scrub
command that takes a snapshot of an lvm volume and e2fscks the snapshot
to see if there's any serious corruption on the volume; creates an
e2scrub_all script to find eligible lvm volumes; and packages all this
into a nice cron job or systemd timer service.

The second half of the series enhances the e2fsprogs build system to
allow us to take advantage of new compiler technologies.  The first
patch enables LTO, which can perform executable-wide code optimizations
(particularly eliminating dead functions).  The three patches after that
enable the sanitizers for undefined behavior, memory access, and thread
safety.  With these sanitizers we can collect runtime reports about
questionable C code, memory access problems, and thread safety problems
(though at the moment e2fsprogs isn't heavily threaded).

Questions?  Comments?

--D