Hi, I've got an embedded product that is currently using a 3.14 kernel, with all user apps compiled with gcc 4.9 against that kernel. When I replace the 3.14 kernel with a 4.9 kernel, and leave everything else the same on the product, I see my memory available drop by over 10MB when looking at /proc/meminfo. The size difference between the 3.14 and 4.9 kernels is only about 1MB, so I'm trying to figure out where the rest went, and if I've possibly configured somehting in the 4.9 kernel differently that's causing the change. Looking at smaps files for various processes, I'm seeing some Rss differences when some common libraries are loaded and I'm wondering if it's really different, or just different accounting/fetching. For instance, with libc and the same process with both kernels: 3.14 kernel: 4c010000-4c0d0000 r-xp 00000000 00:0e 1177 /lib/libc-2.20-2014.11.so Size: 768 kB Rss: 416 kB Pss: 12 kB 4.9 kernel: 4c010000-4c0d0000 r-xp 00000000 00:0e 1177 /lib/libc-2.20-2014.11.so Size: 768 kB Rss: 768 kB Pss: 12 kB Is this difference in Rss something to keep looking into, or are there other thoughts or suggestions on where to look? Thanks! --Mike