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Old 02-19-2012, 08:11 PM
Jonathan Nieder
 
Default Bug#660554: BUG at drivers/dma/ioat/dma_v2.c:163 at boot

Hi Thomas,

Thomas Goirand wrote:

> When running kernel 3.2 with Xen 4.1 in SID, my development server just
> crashes at boot time.
[...]
> It took me quite some time to do (it really isn't trivial to setup, btw),
> but now I do have a serial console dump of the crash (see below).

Thanks. Nice.

[...]
> kernel BUG at [...]/drivers/dma/ioat/dma_v2.c:163!M
[...]
> Pid: 0, comm: swapper/0 Not tainted 3.2.0-1-686-pae #1 Supermicro X8STi/X8STi
> EIP: 0061:[<f74df33d>] EFLAGS: 00010246 CPU: 0
> EIP is at __cleanup+0xd6/0x113 [ioatdma]

This is

active = ioat2_ring_active(ioat);
for (i = 0; i < active && !seen_current; i++) {
...
if (tx->phys == phys_complete)
seen_current = true;
}
...
BUG_ON(active && !seen_current); /* no active descs have written a completion? */

Can you reproduce it with the -amd64 kernel or with 3.3-rc4?

Curious,
Jonathan



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2012/2/20 Leonid Isaev <lisaev@umail.iu.edu>:
> On Sun, 19 Feb 2012 07:01:52 +0800
> =D6=A3=CE=C4=BB=D4(Techlive Zheng) <techlivezheng@gmail.com> wrote:
>
>> 2012/2/19 =D6=A3=CE=C4=BB=D4(Techlive Zheng) <techlivezheng@gmail.com>:
>> > I see, I just upgraded to 1.4.8 on 14 Feb 2012, The log must be
>> > generated by an former version of cronie. Now it seems all gone, and I
>> > can't provid the spamed log because I have cleaned them up 2 days ago.
>> >
>> > Let's see, if there are spams again, I will post here.
>> >
>> > 2012/2/19 Leonid Isaev <lisaev@umail.iu.edu>:
>> >> On Sat, 18 Feb 2012 15:26:46 +0800
>> >> =D6=A3=CE=C4=BB=D4(Techlive Zheng) <techlivezheng@gmail.com> wrote:
>> >>
>> >>> 2012/2/18 Heiko Baums <lists@baums-on-web.de>:
>> >>> > Am Sat, 18 Feb 2012 14:25:54 +0800
>> >>> > schrieb =D6=A3=CE=C4=BB=D4(Techlive Zheng) <techlivezheng@gmail.co=
m>:
>> >>> >
>> >>> >> Due to cronie doesn't contain an /etc/crontab anymore, there are =
losts
>> >>> >> of msgs of missing crontab as shown below in errors.log.
>> >>> >>
>> >>> >> > /usr/sbin/crond[1236]: (root) CAN'T OPEN (/etc/crontab): No suc=
h
>> >>> >> > file or directory
>> >>> >
>> >>> > Such an empty /etc/crontab would belong into the package cronie an=
d not
>> >>> > into the package filesystem. It's cronie specific since fcron, whi=
ch I
>> >>> > use, doesn't need and provide one. The corresponding, but also not
>> >>> > necessary file for fcron would be /etc/fcrontab. And I'm not sure =
if
>> >>> > such an empty /etc/crontab would affect fcron.
>> >>> >
>> >>> > If cronie doesn't provide an empty /etc/crontab and doesn't run
>> >>> > without it, it is a bug in cronie.
>> >>> >
>> >>> > Heiko
>> >>>
>> >>> It runs well,but just spam the error.log and crond.log
>> >>> without /etc/crontab.
>> >>
>> >> Since 1.4.8 cronie doesn't need /etc/crontab... Can you show relevant
>> >> piece of /var/log/crond.log?
>> >>
>> >> --
>> >> Leonid Isaev
>> >> GnuPG key ID: 164B5A6D
>> >> Key fingerprint: C0DF 20D0 C075 C3F1 E1BE 775A A7AE F6CB 164B 5A6D
>>
>> Still have the problem:
>>
>> Feb 19 06:31:01 vbox02 /usr/sbin/crond[8394]: (root) CAN'T OPEN
>> (/etc/crontab): No such file or directory
>> Feb 19 06:32:01 vbox02 /usr/sbin/crond[8394]: (root) CAN'T OPEN
>> (/etc/crontab): No such file or directory
>
> This is odd... you must have something in /var/spool/cron. Otherwise plea=
se
> provide more info because your problem is not easily reproducible.
>
> --
> Leonid Isaev
> GnuPG key ID: 164B5A6D
> Key fingerprint: C0DF 20D0 C075 C3F1 E1BE 775A A7AE F6CB 164B 5A6D

There indeed an /var/spool/cron/root existed, I just deleted, let's see.
 
Old 02-20-2012, 09:06 AM
Thomas Goirand
 
Default Bug#660554: BUG at drivers/dma/ioat/dma_v2.c:163 at boot

On 02/20/2012 05:11 AM, Jonathan Nieder wrote:
> Hi Thomas,
>
>> kernel BUG at [...]/drivers/dma/ioat/dma_v2.c:163!M
> [...]
>> Pid: 0, comm: swapper/0 Not tainted 3.2.0-1-686-pae #1 Supermicro X8STi/X8STi
>> EIP: 0061:[<f74df33d>] EFLAGS: 00010246 CPU: 0
>> EIP is at __cleanup+0xd6/0x113 [ioatdma]
>
> This is
>
> active = ioat2_ring_active(ioat);
> for (i = 0; i < active && !seen_current; i++) {
> ...
> if (tx->phys == phys_complete)
> seen_current = true;
> }
> ...
> BUG_ON(active && !seen_current); /* no active descs have written a completion? */
>
> Can you reproduce it with the -amd64 kernel or with 3.3-rc4?

Hi,

I just tried with the amd64 kernel and Xen, and I didn't see any issue.

However, it is important that Xen 4.1 + Linux 3.2 works with a 32 bits
kernel, because that is the most optimized configuration (eg: 64 bits
hypervisor, 32 bits kernel and 32 bits userland).

I didn't see any 3.3-rc4 kernel package in Debian. Is it planned to be
uploaded to Experimental or something?

Thomas



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