On Thu, Jan 7, 2010 at 8:34 PM, Anand Raj Manickam <anandrm@xxxxxxxxx> wrote:
> I have a few doubts regarding Out of Memory .
>
> 1.Does memory leak in the kernel always lead to OOM ?
>
> 2. I wrote a kernel test module testing the memory leak , which on
> exit kmallocs
>
> exit_module ()
> {
> while(1)
> kmalloc((8*1024),GFP_KERNEL);
> }
>
> so when i rmmod test , the kernel never panicked on OOM , but it
> panicked on the page allocation stat (sorry for not attaching the
> dump)
> Does the kernel differentiate between a Memory Leak and a Out of
> memory situation ?
You don't panic immediately. Memory leaks eventually leads to out of
memory because the memory manager has given all the memory to someone
and hasn't got back (leaked !!). So if a new requestor comes he
doesn't have anything to allocate and you get out of memory.
Thanks -
Manish
>
> Google didnt help me in the releation between memory leak and OOM .
>
> Thanks,
> Anand
>
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>
--
Thanks -
Manish
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