lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Tue, 28 May 2019 23:56:47 -0700
From:   Christoph Hellwig <>
To:     Theodore Ts'o <>
Cc:     Sahitya Tummala <>,
        Andreas Dilger <>,
Subject: Re: fsync_mode mount option for ext4

On Wed, May 29, 2019 at 01:23:32AM -0400, Theodore Ts'o wrote:
> If you have protection against sudden shutdown, then nobarrier is
> perfectly safe --- which is to say, if it is guaranteed that any
> writes sent to device will be persisted after a crash, then nobarrier
> is perfectly safe.  So for example, if you are using ext4 connected to
> a million dollar EMC Storage Array, which has battery backup, using
> nobarrier is perfectly safe.

And while we had a few oddities in the past in general any such device
will obviously not claim to even have a volatile write cache, so
nobarrier or this broken proposed mount option won't actually make any

Powered by blists - more mailing lists