Re: kmemleak suggestion (long message)

[Catalin Marinas <catalin.marinas@arm.com>]

On Fri, 2009-06-26 at 08:59 +0200, Ingo Molnar wrote:
> * Sergey Senozhatsky <sergey.senozhatsky@mail.by> wrote:
> > Currently kmemleak prints info about all objects. I guess 
> > sometimes kmemleak gives you more than you actually need.
> 
> It prints _a lot_ of info and spams the syslog. I lost crash info a 
> few days ago due to that: by the time i inspected a crashed machine 
> the tons of kmemleak output scrolled out the crash from the dmesg 
> buffer.
> 
> This is not acceptable.
> 
> Instead it should perhaps print _at most_ a single line every few 
> minutes, printing a summary about _how many_ leaked entries it 
> suspects, and should offer a /debug/mm/kmemleak style of file where 
> the entries can be read out from.

I agree as well. It already provides the /sys/kernel/debug/kmemleak
which triggers a scan and shows possible leaks. That's easily fixable.

BTW, this was questioned in the past as well - do we still need the
automatic scanning from a kernel thread? Can a user cron job just read
the kmemleak file?

-- 
Catalin

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