KernelTrap - Linux kernel

why the funny kernel always crashes ?

gazolinia — Thu, 27 May 2010 20:50:23 +0000

Hi,

Linux: Dual port 3G SAS drive get port swapped after power cycling

jupiturliu123 — Thu, 20 May 2010 23:43:37 +0000

Hi All :

We do power cycling test over our dual port 3G/6G drive test over LSI 3G 1068E/ 6G 2008 Controller. We sometime found the port get swapped during the power cycling. It happened more often in 3G SAS controller than 6G controller.
For example:
In the beginning before power off,
phy 0, sas_addr 0x50014ee30005078e were associated with sda and sg2
but after power on.

what is an APE memory?

skokal01 — Thu, 13 May 2010 06:16:08 +0000

Hey I was going through Broadcom Tigon 3 drivers code and I see that APE memory is mapped using pic_ioremap_bar(pdev,BAR_2).

I couldn't any information in the broadcom datasheet about APE memory. What is an APE memory and what exactly it is used for?

http://lxr.linux.no/linux+v2.6.33/drivers/net/tg3.c#L14499

Thanks,
Santhosh Kokala

kernel hangs

ub007 — Mon, 10 May 2010 08:54:19 +0000

my hp proliant DL185 server doesn't boot up as expected .

i've managed to capture the msgs & traces dumped to console. See below

Quote:
end_request: I/O error, dev cciss/c0d2, sector 0
end_request: I/O error, dev cciss/c0d2, sector 0
end_request: I/O error, dev cciss/c0d2, sector 1
Quote:
ciss: cmd f6c00000 has CHECK CONDITION sense key = 0x4

syscall interception module on 2.6.32

saliari2 — Sat, 08 May 2010 14:00:15 +0000

Hi,

I am using the following kernel module to intercept some syscalls. I have got sys_call_table address from the /boot/System.map.x.x. The module works file on Ubuntu 7.10 (2.6.24) but gets killed upon insmod in Ubuntu 10.04 and Fedora 12 (2.6.32) with error "Kernel paging request error address c0xxxxx [which is, based on System.map, an address in sys_call_table]".

Compile new kernel on old system - problems

witjojo — Thu, 06 May 2010 10:32:13 +0000

Hello,

I have a old SuSe Linux 9.3 distribution with a 2.6.11.4-21 Suse Kernel.
Now i have new Hardware and will the old system run on this new Hardware, but some new Hardware
is not working (Network, PCI, Graphic an so on). And i need the old System (very important).

So i compiled an new Suse kernel (2.6.31 from Suse 11.2) on the old Suse 9.3 in the new Hardware System.

How to determine Amount of free kernel memory and problem with __get_free_pages()

Wed, 05 May 2010 03:41:06 +0000

I want to write a loop that sucks up all the 2mb slugs of memory I can get in the kernel. However, I want to leave "some" free space (say 20% of the machine's total phys mem). So, how can I do that? I have a loop now something like as an experiment to get all the mem I can and then release enough for the system to continue running but the kernel hangs:

for( i = 0; i < MAX_SLUGS; ++i )
{

TCP Limited Transmit

Tue, 04 May 2010 20:57:19 +0000

Where is implemented in the kernel linux the Limited Transmit Algorithm? It is explained in rfc 3042.. I have not found it in the tcp_input.c file...

CFS scheduler patch for 2.6.18-164?

Wed, 21 Apr 2010 03:11:36 +0000

I'm using RHEL 5.4 with the kernel 2.6.18-164.Can I introduce the CFS into the kernel by adding a patch,or should I create the patch myself?
Is there any available patch for this kernel?