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Editorial Team
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Asked: 2026-05-13T20:26:49+00:00

I have a Linux running on a ARM Cortex-A8 processor board. The version of

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I have a Linux running on a ARM Cortex-A8 processor board. The version of the kernel is obtained by (uname -a):

Linux 2.6.29-dirty #2 Fri Jan 29 16:54:21 IST 2010 armv7l unknown

To debug some of my application which crashes due to malloc() failure(The size i am mallocing is large), and the board has 208 MB DRAM. On this Linux/board setup, i need to find out :

  1. What is the Heap Size that is allocated/set aside for this kernet config.

  2. How can i increase this heap size. Does it need kernel re-build/new version of kernel image?

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  1. Editorial Team

    I don’t know about specifics of the ARM Linux; however, assuming that you are talking about userspace application and not kernel space, there is inherently no ‘heap size’. The ‘classical unix way’ of userspace memory management is an ‘expanding heap’ – the application has a heap of finite size and when it needs to expand it, it calls the brk() function.
    I guess you have no swap and disabled overcommit on this platform – looki into /proc/meminfo (or output of ‘top’) to see the available memory.

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