linux-kernel - Re: [GIT PULL] ext4 updates for 3.9

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Message-ID: <20130227191115.GA10710@redhat.com>
Date:	Wed, 27 Feb 2013 14:11:15 -0500
From:	Dave Jones <davej@...hat.com>
To:	"Theodore Ts'o" <tytso@....edu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	"gnehzuil.liu" <gnehzuil.liu@...il.com>,
	Zheng Liu <wenqing.lz@...bao.com>,
	Borislav Petkov <bp@...en8.de>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] ext4 updates for 3.9

On Wed, Feb 27, 2013 at 02:04:19PM -0500, Theodore Ts'o wrote:
 > On Wed, Feb 27, 2013 at 01:57:55PM -0500, Dave Jones wrote:
 > > Building now.  Can you confirm that nothing on-disk should be awry ?
 > > Or will I need a new fsck to detect what happened ?
 > > 
 > 
 > Well, it's possible that a read from data file which had blocks
 > located above 512GB might have gotten bogus information, or a block
 > allocated above 512GB might result in a write to the wrong place on
 > disk.
 > 
 > So if you are very cautious, running fsck just to make sure things are
 > OK is not a bad idea.  But it's likely that the directory sanity
 > checks would have caught things quickly, or trying run an executable
 > would have caused a seg fault quickly enough.  If your system crashed
 > very quickly during the boot process, you'll probably be OK.

It had been up a few hours before I hit those checks.

fsck never found anything.  I do have another disk (XFS formatted) with
a backup from a week ago. I'll run a --dry-run rsync to see if it
picks up any changes that I don't expect.

	Dave

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