> Hi, > > During my target boot up, I could see the following message getting printed > for 2.4.18 kernel: > > Memory: 12660k/12928k available (1689k kernel code, 268k reserved, 1512k > data, 72k init, 0k highmem) > > I would like to know what is this reserved memory of 268K? > AFAIK, it is static kernel data structures (please correct me if I am > wrong). memory allocated by kernel at boot time is called reserved memory. > > Is there any way of knowing how much reserved memory a kernel would need by > looking at the compile time size of the vmlinux? I don't think so, because it's run time allocation. > Is this reserved memory > configurable kind of a thing? How much importance should we attach to this > reserved memory once the boot process is complete? Is this reserved memory > completely released for use to the applications? Not sure of complete, but definitely it will be release as and when not needed ;-) > My interest is obviously in trying to understand and ensure that it is as > low as possible so that maximum RAM is available for run time usage of the > applications. > > Any ideas or suggestions are welcome, > > ~Syam > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
