linux-kernel - Re: Disk spindown on rmmod sd

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: <4721C0A6.4000200@gmail.com>
Date:	Fri, 26 Oct 2007 19:25:42 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
CC:	James.Bottomley@...eleye.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-scsi@...r.kernel.org
Subject: Re: Disk spindown on rmmod sd_mod

Jan Engelhardt wrote:
> I am using 2.6.23-rc9 with pata_sis. `modprobe -r sd_mod`, which I ran 
> from initramfs, caused all my disks to spindown - sd even told me so.
> 
> I recall there has been talk a while back about whether to spin down 
> disks on shutdown or not, but I do not think it touched the removal of 
> sd_mod, did it? So either way, can someone fill me in why the spindown 
> is done?

The problem is that it's difficult to tell why a disk is going down from
sd_shutdown(), so it issues STOP unless system state is SYSTEM_RESTART.
 Maybe we need to issue STOP only for SYSTEM_HALT, SYSTEM_POWER_OFF and
SYSTEM_SUSPEND_DISK.

Thanks.

-- 
tejun
-
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/