Re: ipc,sem: sysv semaphore scalability

From: Emmanuel Benisty
Date: Fri Mar 22 2013 - 23:19:23 EST

Hi Linus,

On Fri, Mar 22, 2013 at 10:37 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> On Fri, Mar 22, 2013 at 4:04 AM, Emmanuel Benisty <benisty.e@xxxxxxxxx> wrote:
>> I was trying your patchset and my machine died while building a
>> package. I could reproduce the bug the (only) two times I tried.
>> There's a poor quality picture here:
> Hmm. The original oops may well have scrolled off the window, what
> remains is just indicating something is corrupted in slab. Which isn't
> likely to give much hints..
> Can you try to reproduce this with CONFIG_SLUB_DEBUG=y and
> CONFIG_SLUB_DEBUG_ON=y, and see if there are any earlier messages?

I could reproduce it but could you please let me know what would be
the right tools I should use to catch the original oops?
This is what I got but I doubt it will be helpful:

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