[okl4-developer] out of vmalloc space

[최수길]

I looked at Linux SConscript to increase the memory given to the linux.
 
But I could not figure it out.
 
Please tell me the way in more detail.
 
Thanks.
 
-----Original Message-----
From: "Geoffrey Lee"<glee at ok-labs.com> 
To: "최수길"<hips05 at naver.com>
Cc: 
Sent: 08-11-18(화) 18:06:17
Subject: Re: Re: [okl4-developer] out of vmalloc space
On Tue, Nov 18, 2008 at 05:54:48PM +0900, 최수길 wrote:
> Initially, the size of vmalloc space was 0x400000.
Would it be possible for you to tell us exactly what drivers /
modifications you made as well as what your program
is trying to do? Normally user programs 
don't invoke the vmalloc routines, this makes me think
you are doing more than just running a program. In particular,
I think your program is causing some device driver which you 
enabled to try to allocate a large block of kernel virtual
memory. In OK Linux, the vmalloc memory is pre-backed 
with physical memory rather than faulted in on demand, 
this probably explains your out of memory situation as
all your memory was probably used to back your large 
vmalloc section.
The memory given to OK Linux by default is 20M, you can
increase that in the Linux SConscript.
-gl
p.s. Please post on-list. There are other OKL4 developers who are
on this list who might also be able to help you.
> 
> For simplicity, let's call the program which causes the error of "out of vmalloc space" prog_A.
> 
> With the vmalloc space of 0x400000 size, prog_A was executed without problem.
> 
> After adding some device drivers and servers, I encountered the error by executing the prog_A.
> 
> Before executing the prog_A, everything was OK.
> 
> I increased the size of vmalloc space up to 0xe00000, but the problem was not solved.
> 
> As it was all right with the vmalloc space of 0x400000, I thought the problem would be solved
> by adding less than 0x400000.
> 
> But, it was not.
> 
> If I increase the size of vmalloc space up to 0xf00000, I see an error as below.
> 
> I always appreciate your help.
> 
> Thanks.
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