On Fri, Nov 18, 2011 at 21:49, sparsh mittal <sparsh0mit...@gmail.com> wrote: > GBrange numberOfAddresses > > 0-0.5---> 3325 > > 0.5-1---> 1253 > > 1-1.5---> 0 > > 1.5-2---> 30 > > 2-2.5---> 0 > > 2.5-3---> 1708 > > 3-3.5---> 10521 > > 3.5-4---> 0 > > 4-4.5--> 15428
Hi... I never observe the above address usage like you did, but I think that is expected. The reason is that Linux kernel tends to allocate from high memory (above 896 MiB ) to allocate pages, including their page tables. This is done to lower the "pressure" against normal memory zone. Now for the "unbalance" case, I guess that's due the high usage of slab. I am not sure where in fact they are started to be placed in RAM. One thing for sure is that they act as cache for frequest used objects such task structs, bio, socket buffers. So, as you can take a guess. It's a mechanism in Linux memory management which is quite complicated. Not sure if there's shortcut to shape this up. -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
