lists.openwall.net   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  linux-cve-announce  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]
Message-ID: <194f62550909160532q248cb45coee639a2da10292a@mail.gmail.com>
Date:	Wed, 16 Sep 2009 08:32:12 -0400
From:	Clemens Eisserer <linuxhippy@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: Howto switch off ext4's delayed allocation?

Hi,

Just happend again to me.
After the intel driver crashed my system, the source-file I was
working on was empty. Fourtunatly eclipse has a history-log.

Isn't there a way to switch off the more "dangerous" optimizations in ext4?
I already searched howto do this, but from what I've seen there was
only discussion about providing a switch for disabling delayed
allocation, but it was never done?

Thanks, Clemens

2009/9/9 Clemens Eisserer <linuxhippy@...il.com>:
> Hi,
>
> Every since switching to ext4, I suffer fromt he empty files problem
> after crashes.
> Since GEM/KMS was included, as well as the changes to the usb-serial
> subsystem I experience crashes from time to time.
>
> As far as I understand this is caused by delayed allocation.
> I really enjoy the performance benefits of ext4, and I know
> applications should be fixed - but having this problem seen with so
> many apps I doubt it will ever happen. (Kwrite, bash itself, umtsmon,
> ...).
>
> Is there any way to disable delayed allocation? (running 2.6.31rc8)
>
> Thank you in advance, Clemens
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ