Hi, I would like to attend the LSF/MM Summit and discuss about the ongoing work on developing Memory Power Management technology in the Linux kernel. Main memory can consume a significant amount of power in the system (upto even 40%). Hence, memory is the next big target for power-management, and this technology can benefit computer systems ranging from mobile phones and tablets, to server systems that form the back-bone of cloud computing infrastructures. I have designed 3 core changes to the Linux MM subsystem to support Memory Power Management, namely 'Sorted Buddy Page Allocator' (to influence Page Allocation), 'Targeted Memory Compaction mechanism' (to handle memory fragmentation) and a 'Region Allocator' as a back-end to the Page Allocator (to serve as an anti-fragmentation scheme that boosts the success rates of targeted memory-region evacuation). I had got the opportunity to discuss some of these designs and algorithms at the Linux Kernel Summit last year, where I had also presented some interesting power-savings numbers on IBM POWER 7 hardware. At the moment, I'm working on evaluating the patchset on newer IBM server platforms with POWER 8 processors, and playing with different memory region configurations on server hardware and trying to adapt my MM algorithms to work well with large memory region sizes and fewer number of memory regions. I'm also looking at understanding the memory access behavior of applications that use large chunks of memory, such as KVM VM instances, and working on tuning my patchset accordingly. At the same time, I'm helping out folks from the ARM ecosystem to try out this patchset on their embedded boards to evaluate the benefits on their platforms. I would like to present the designs and algorithms behind Memory Power Management at the summit, along with newer power-savings and performance numbers, and thereby convince the MM maintainers about the benefits of this feature and the elegance of its implementation. Thank you very much. References: ---------- 1. LWN articles about Memory Power Management: http://lwn.net/Articles/547439/ http://lwn.net/Articles/568891/ 2. v4 of my Memory Power Management patchset: http://lwn.net/Articles/568369/ 3. Experimental results from my patchsets: http://article.gmane.org/gmane.linux.power-management.general/40336 http://article.gmane.org/gmane.linux.power-management.general/38987 4. Articles on Phoronix.com covering Memory Power Management and its end-user benefits: http://www.phoronix.com/scan.php?page=news_item&px=MTM0NzU http://www.phoronix.com/scan.php?page=news_item&px=MTUxMjA Regards, Srivatsa S. Bhat -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>