linux-kernel - Re: [Bug #25402] kernel (2.6.37-8-generic_amd64) panic on boot (with message "map_single: bounce buffer is not DMA'ble)

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Date:	Fri, 31 Dec 2010 10:45:06 +0100
From:	carlos palma <carlos.palma@....com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Maciej Rutecki <maciej.rutecki@...il.com>,
	Florian Mickler <florian@...kler.org>
Subject: Re: [Bug #25402] kernel (2.6.37-8-generic_amd64) panic on boot (with
 message "map_single: bounce buffer is not DMA'ble) - possible regression
 !!!

Because, at the beginning I tough it could be also a DELL firmware problem.
The 32 bit version works fine, the 64 bits under KVM works fine (tested 
with 1GB ram).
Only a few days ago I found similar problems also on DELL machines...
Happy new year

carlos


On 12/30/2010 11:51 PM, Rafael J. Wysocki wrote:
> On Thursday, December 30, 2010, carlos palma wrote:
>> I can confirm that this "regression" still exists with the kernel
>> 2.6.37-rc8.
>> The Call Trace is basically the same:
>>
>> ...
>> Kernel panic - not syncing: map_single ...
>> Pid 935, comm: NetworkManager Tainted
>> call trace
>> panic+oxbf/0x200
>> ? default_spin_lock_flags+0x9/0x10
>> ?swiotlb_tlb_map_single+0x1ce/0x250
>> ?map_single+0x46/0x60
>> swiotlb_map_page+0xa6/0xf
>> ... and then the FREEZE ... only a hard reset brings to live (with he begining
>> 2.6.36-2) Linux.
> Thanks for the info.
>
> Why did you put "regression" into double quotes?
>
> Rafael
>

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