Re: [PATCH] ring-buffer: Add set/clear_current_oom_origin() during allocations

[Steven Rostedt]

On Wed, 4 Apr 2018 09:03:47 -0700
Joel Fernandes <joelaf@xxxxxxxxxx> wrote:


> > for the tests. Note, without this, I tried to allocate all memory
> > (bisecting it with allocations that failed and allocations that
> > succeeded), and couldn't trigger an OOM :-/  
> 
> I guess you need to have something *else* other than the write to
> buffer_size_kb doing the GFP_KERNEL allocations but unfortunately gets
> OOM killed?

Yeah, for some reason, my test box seems to always have something doing
that, because I trigger an OOM about 2 out of every 3 tries.

Here's the tasks that trigger it:

 lvmetad, crond, systemd-journal, abrt-dump-journ, chronyd,

I guess my system is rather busy even when idle :-/

> 
> Also, I agree with the new patch and its nice idea to do that.

Thanks, want to give it a test too?

-- Steve