LinuxLists.cc - PCI devices (buses?) and 3GB of RAM lost with 4.2rc1

2015-07-08 20:09:35

Subject: PCI devices (buses?) and 3GB of RAM lost with 4.2rc1

Hi all,

this is on a Thinkpad X200s, 5 years old and working fine, until 4.2rc1
came along.

With that booted, I do not have a WiFi card anymore, it doesn't even
appear in "lspci" output.

I only had a 4.0.5 lying around for comparison, so I'm attaching dmesg
from both kernels.
>From diffing the dmesg's, it also looks like I lost some of my RAM:

-Memory: 8050048K/8280176K available (6401K kernel code, 980K rwdata,
4864K rodata, 1532K init, 1516K bss, 230128K reserved, 0K cma-reserved)
+Memory: 5104620K/8280176K available (6823K kernel code, 1096K rwdata,
3220K rodata, 1556K init, 1520K bss, 227792K reserved, 0K cma-reserved)

Does anyone know what's going on here?

Thanks in advance,

Stefan
--
Stefan Seyfried
Linux Consultant & Developer
Mail: [email protected] GPG Key: 0x731B665B

B1 Systems GmbH
Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de
GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB 3537

Attachments:

dmesg-4.0.5.txt (59.47 kB)
dmesg-4.2.txt (57.73 kB)
Download all attachments

2015-07-11 17:14:17

by Stefan Seyfried

[permalink] [raw]

Subject: Re: PCI devices (buses?) and 3GB of RAM lost with 4.2rc1

Am 08.07.2015 um 22:09 schrieb Stefan Seyfried:
> this is on a Thinkpad X200s, 5 years old and working fine, until 4.2rc1
> came along.
>
> With that booted, I do not have a WiFi card anymore, it doesn't even
> appear in "lspci" output.

> From diffing the dmesg's, it also looks like I lost some of my RAM:
>
> -Memory: 8050048K/8280176K available (6401K kernel code, 980K rwdata,
> 4864K rodata, 1532K init, 1516K bss, 230128K reserved, 0K cma-reserved)
> +Memory: 5104620K/8280176K available (6823K kernel code, 1096K rwdata,
> 3220K rodata, 1556K init, 1520K bss, 227792K reserved, 0K cma-reserved)

This was only a one-off thing, it looks like the hardware was confused
when first booting 4.2-rc1
(I found out when I wanted to bisect it, all the kernels I built did
just work, and then I finally booted the distro-kernel again and it also
worked :-)

So everything is fine, sorry for the noise.
--
--
Stefan Seyfried
Linux Consultant & Developer
Mail: [email protected] GPG Key: 0x731B665B

B1 Systems GmbH
Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de
GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB 3537