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  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:	Mon, 2 Jul 2012 19:44:21 +0200
From:	Jan Kara <>
To:	Eric Sandeen <>
Cc:	Theodore Ts'o <>, Fredrick <>,
	Ric Wheeler <>,,
	Andreas Dilger <>,
Subject: Re: ext4_fallocate

On Mon 02-07-12 11:33:33, Eric Sandeen wrote:
> On 07/01/2012 10:16 PM, Zheng Liu wrote:
> > Hi Eric,
> > 
> > Could you please run this test with 'journal_async_commit' flag.  In my
> > previous test, this feature can dramatically improve the performance of
> > uninitialized extent conversion.
> > 
> > I have sent an email to do a similar test [1].  In that email, I do a
> > similar test and the journal_async_commit flag quite can improve the
> > performance.
> I can try to find time for that, but so far I haven't actually seen any
> severe impact of conversion on a non-debug kernel.  And didn't Jan think
> that journal_async_commit was fatally flawed?
  Yes, that option is broken and basically unfixable for data=ordered mode
(see For
data=writeback it works fine AFAICT.

Jan Kara <>
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists