linux-kernel - Re: ata

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: <47D08FAA.7070001@gmail.com>
Date:	Fri, 07 Mar 2008 09:43:22 +0900
From:	Tejun Heo <htejun@...il.com>
To:	James Bottomley <James.Bottomley@...senPartnership.com>
CC:	Mark Lord <liml@....ca>, Matthew Wilcox <matthew@....cx>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jeff Garzik <jeff@...zik.org>
Subject: Re: ata_ram driver

James Bottomley wrote:
> On Fri, 2008-03-07 at 09:28 +0900, Tejun Heo wrote:
>> James Bottomley wrote:
>>>> Yeap, sure.  It's the combination of things that always made me put this
>>>> off.  Is there a function I can call to just shutdown the host instead
>>>> of destroying it?
>>> Not really ... the process of unbinding the ULDs causes their remove
>>> methods to call shudown.  It is possible to separate this in the ULDS;
>>> but the original design was to make remove and shutdown be similar for
>>> the very reason that if you're removing the driver with unflushed data
>>> in the cache, we'd really like it flushed (flush is called from
>>> shutdown) because you have no way to talk to the device after this
>>> without reinserting the driver.
>> The problem is that libata EH and other stuff aren't ready to let go of
>> the SCSI host up until the last moment and that last moment can't be
>> moved before SCSI host destruction because shutdown sequence (flush and
>> spindown) requires live EH.  I think this can be solved by shooting down
>> individual sdev's instead of destroying the scsi_host.
> 
> Basically what scsi_scan.c:scsi_forget_host() does?  It's used
> internally at the moment, but I suppose we could export it.

Yeap, exactly.  I'll prep a patch after breakfast.

-- 
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/