linux-kernel - Re: 2.6.24.X: SATA/AHCI related boot delay.

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Message-ID: <480013A3.1010502@garzik.org>
Date:	Fri, 11 Apr 2008 21:42:59 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Tejun Heo <htejun@...il.com>
CC:	Volker Armin Hemmann <volker.armin.hemmann@...clausthal.de>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	Peer Chen <pchen@...dia.com>, Kuan Luo <kluo@...dia.com>
Subject: Re: 2.6.24.X: SATA/AHCI related boot delay. - not with 2.6.24.3

Tejun Heo wrote:
> Volker Armin Hemmann wrote:
>> Hi,
>>
>>> Aiee.... Can you please try 2.6.25-rc8 with both configurations?  And
>>> w/o systemrescuecd?  Just seeing whether things mount properly or not is
>>> good enough.  There isn't much risk of losing data.
>>
>> 2.6.25-rc8 is a 'no change'. AHCI+pci=nomsi boots, AHCI without hangs.
>> with AHCI I also get this:
>>
>> [    0.363828] ------------[ cut here ]------------
>> [    0.363828] WARNING: at drivers/ata/ahci.c:645 
>> ahci_init_one+0x190/0xa3a()
>> [    0.363828] Modules linked in:
>> [    0.363828] Pid: 1, comm: swapper Not tainted 2.6.25-rc8 #2
> 
> Heh.. that's AHCI_EN not getting set.  Peer, any ideas?  The driver set 
> AHCI_EN in the HOST_CTL register but on reading back it's still clear.

Possibly the hardware is not idle?  I wonder if the BIOS is doing 
anything with the IDE interface.  _Probably_ not, but that is certainly 
a situation where switching to AHCI can be a problem for certain AHCI chips.

	Jeff



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