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: <20071113212230.77cadecd@the-village.bc.nu>
Date:	Tue, 13 Nov 2007 21:22:30 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Sebastian Kemper <sebastian_ml@....net>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: libata/PATA: GPCMD_SET_STREAMING via SG_IO does nothing

> while trying to limit the speed of DVD drives during DVD playback I've
> come under the impression that GPCMD_SET_STREAMING via SG_IO doesn't yet
> work with libata/PATA (AMD/NVIDIA PATA support). I tested on an NForce2
> board (all IDE, no SATA) and kernel 2.6.22.12. When I use the "old" ATA
> kernel driver my drive slows down, with libata it doesn't. Is this a
> known issue or has this slipped by unnoticed?

It isn't a known issue, and it suprises me as SG_IO basically passes
commands through to the drive. We don't support speed change via xfermode
setting but GPCMD_SET_STREAMING sohuld behave.

> 
> I tried with mplayer dvd:// -dvd-device /dev/sr0 -dvd-speed BTW . I get
> no errors in syslog/dmesg. Also mplayer doesn't report a problem (so
> ioctl(fd, SG_IO, &sghdr) doesn't have a return < 0).

Do you have a simple code example that shows the problem ?
-
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