Re: Kernel 2.6.21.3 does not work with 8GB of RAM on Intel 965WH

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On Wed, 30 May 2007, Zoltan Boszormenyi wrote:

Hi,

Look at how slow the raid benchmarks are in dmesg with 8GB of memory!

[   59.592560] raid6: using algorithm sse2x4 (476 MB/s)
[   59.597558] raid5: using function: generic_sse (56.000 MB/sec)

Yikes!

With mem=4096M:
[   60.336352] raid6: using algorithm sse2x4 (6804 MB/s)
[   60.341345] raid5: using function: generic_sse (8552.000 MB/sec)

What is going on here?

Justin.
I saw a similar effect on a P5 board that could
only cache 64MB of memory a long time ago.
Putting more memory into it made the machine slower
and e.g. made the sym2 driver giving up at initialization.
Maybe it's a modern reincarnation of the problem?

Best regards,
Zoltán Böszörményi

I see, so Intel 965 motherboards do not work with 8GB of memory?  Or is 
this a Linux issue?
I have an Intel Case ID open 225446 but so far we have not gotten anywhere 
with this problem.  Currently I have 8GB in the machine and boot with 
mem=4096M.  Was there any type of fix?  Any recommendations as to what I 
can do?  Continue to speak with Intel?  Or perhaps someone with more 
knowledge of the kernel and chime in as to what exactly is happening here?
Justin.

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux