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On Wed, 30 May 2007, Justin Piszcz wrote: >>> On Tue, 29 May 2007, Robert Hancock wrote:>>> Justin Piszcz wrote:>>> Short Description of Problem:>>> Linux 2.6.21.3 does not run properly with 8GB of ram on the Intel 965WH >>> motherboard.>>> I found it interesting in make menuconfig on x86_64 there is no 4GB/64GB >>> options in the kernel that I remember seeing in 32bit.>> >> That's because that option is not applicable in 64-bit mode. >> >> Can you send your full dmesg output from the 8GB bootup? >> >> -- >> Robert Hancock Saskatoon, SK, Canada>> To email, remove "nospam" from hancockr@nospamshaw.ca >> Home Page: http://www.roberthancock.com/ >> >> Kernel dmesg attached from 8GB bootup.>> Robert, how come the option is not applicable in 64-bit mode? If I want to > use all 8GB of memory I need to run a 32-bit kernel? >> Justin. 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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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