linux-kernel - Re: BUG: writing '0' to queue/rotational causes system hang

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] [day] [month] [year] [list]

Message-ID: <4A26FEA3.4030909@intel.com>
Date:	Wed, 03 Jun 2009 15:52:19 -0700
From:	"Kok, Auke" <auke-jan.h.kok@...el.com>
To:	Jens Axboe <jens.axboe@...cle.com>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: BUG: writing '0' to queue/rotational causes system hang

Kok, Auke wrote:
> I stumbled into the following bug on an Acer Aspire 1 running moblin2-beta: The
> drive misidentifies itself as being 'rotational' even though it's an SSD drive.
> drive/model = "SSDPAMM0008G1EA" - the standard 8gb SSD provided with Acer Aspire
> one models.
> 
> Tuning 'rotational' to '0' at boot time causes the system to hard lock up. We're
> attempting to do this tuning early in the boot phase in order to get the right
> queueing and possibly improve startup time, so there is a lot of IO going on at
> the moment.
> 
> Not sure what the real cause it so far. Test case is a simple "echo 0 >
> /sys/block/sda/queue/rotational". Doing this at idle time has no effect, so I
> suspect a race with the IO scheduler.

PEBKAC, pls ignore :)

Auke
--
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/