From: Tejun Heo <htejun@gmail.com>
To: Tejun Heo <htejun@gmail.com>,
linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org,
alan@redhat.com, jeff@garzik.org
Subject: Re: [PATCH] libata: Forcing PIO0 mode on reset must not freeze system
Date: Mon, 11 Feb 2008 19:49:17 +0900 [thread overview]
Message-ID: <47B0282D.2050703@gmail.com> (raw)
In-Reply-To: <20080211102907.GC4646@homac.suse.de>
Hello,
Holger Macht wrote:
>> In the above example, even the reset sequence itself can cause hang if
>> the hardware is implemented slightly differently. The reason why
>> set_piomode() locks up but reset sequence doesn't is simple dumb luck.
>
> Another thing, whether it's poor luck or not, it worked like this than at
> least 2.6.22. And it was _heavily_ tested. The above commit broke it
> between 2.6.24-rc1 and 2.6.24-rc2, which is at least a regression.
Yes, in a sense but the change is in the area where there's no defined
behavior, so I don't think it's a good idea to revert the change here.
Let's concentrate on finding the proper solution.
Thanks.
--
tejun
next prev parent reply other threads:[~2008-02-11 10:49 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-10 19:55 [PATCH] libata: Forcing PIO0 mode on reset must not freeze system Holger Macht
2008-02-11 2:37 ` Tejun Heo
2008-02-11 10:04 ` Holger Macht
2008-02-11 11:16 ` Tejun Heo
2008-02-11 11:28 ` Holger Macht
2008-02-11 13:11 ` Tejun Heo
2008-02-11 14:06 ` Holger Macht
2008-02-11 23:31 ` Tejun Heo
2008-02-14 12:42 ` Holger Macht
2008-02-11 11:25 ` Alan Cox
2008-02-11 10:29 ` Holger Macht
2008-02-11 10:49 ` Tejun Heo [this message]
2008-02-11 11:32 ` Alan Cox
2008-02-11 11:50 ` Alan Cox
2008-02-11 11:50 ` Alan Cox
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