linux-kernel - Re: 3.9-rc1: crash kernel panic - not syncing: Can not allocate SWIOTLB buffer earlier and can't now provide you with the DMA bounce buffer

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: <CAE9FiQUtDcwJkPMPfjur8LQ+u0Hc2J7sbxC=xkcemqRQ1_Gd8g@mail.gmail.com>
Date:	Thu, 7 Mar 2013 22:32:39 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	CAI Qian <caiqian@...hat.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kexec <kexec@...ts.infradead.org>,
	Dave Young <dyoung@...hat.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	WANG Chao <chaowang@...hat.com>
Subject: Re: 3.9-rc1: crash kernel panic - not syncing: Can not allocate
 SWIOTLB buffer earlier and can't now provide you with the DMA bounce buffer

On Thu, Mar 7, 2013 at 10:03 PM, CAI Qian <caiqian@...hat.com> wrote:
> CC'ing kexec ML. Also mentioned that 3.8 has no such issue.
>
> This message looks suspicious and out of range while 3.8 reservation
> looks within the range.
>
> [    0.000000] Reserving 128MB of memory at 5216MB for crashkernel
> (System RAM: 3977MB)
>
> Wondering if anything to do with memblock again...

that is intended...

> ----- Original Message -----
>> From: "WANG Chao" <chaowang@...hat.com>
>> To: "LKML" vger.kernel.org>
>> Cc: "CAI Qian" <caiqian@...hat.com>
>> Sent: Friday, March 8, 2013 1:54:37 PM
>> Subject: 3.9-rc1: crash kernel panic - not syncing: Can not allocate SWIOTLB buffer earlier and can't now provide you
>> with the DMA bounce buffer
>>
>> Hi, All
>>
>> On 3.9-rc1, I load crash kernel with latest kexec-tools(up to
>> 28d413a), but
>> 2nd kernel panic at early time:
>> [    2.948076] Kernel panic - not syncing: Can not allocate SWIOTLB
>> buffer earlier and can't now provide you with the DMA bounce buffer
>> [    2.959958] Pid: 53, comm: khubd Not tainted 3.9.0-rc1+ #1

You need to add crashkernel_low=64M in first kernel.

As your system does not support DMA remapping.

Thanks

Yinghai
--
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/