From: Sasha Levin <sasha.levin@oracle.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: peterz@infradead.org, mingo@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] lockdep: increase static allocations
Date: Wed, 08 Jan 2014 15:10:55 -0500 [thread overview]
Message-ID: <52CDB0CF.5060904@oracle.com> (raw)
In-Reply-To: <87lhyq45go.fsf@tassilo.jf.intel.com>
On 01/08/2014 02:51 PM, Andi Kleen wrote:
> Sasha Levin <sasha.levin@oracle.com> writes:
>
>> Fuzzing a recent kernel with a large configuration hits the static
>> allocation limits and disables lockdep.
>
> Doesn't that use a lot more memory? I thought lockdep preallocates.
>
> Doubling may be too aggressive.
The patch adds about 4MB of memory usage, I didn't think it's too much for something
that is only enabled during debugging.
If this is an issue, can I suggest making these values configurable in the .config
and just let users pick whatever they want?
Thanks,
Sasha
next prev parent reply other threads:[~2014-01-08 20:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-08 19:21 [PATCH] lockdep: increase static allocations Sasha Levin
2014-01-08 19:51 ` Andi Kleen
2014-01-08 20:10 ` Sasha Levin [this message]
2014-01-08 23:23 ` Andi Kleen
2014-01-09 8:56 ` Peter Zijlstra
2015-03-24 14:42 ` James Hogan
2014-02-28 19:32 ` Sasha Levin
2014-03-01 4:33 ` Mike Galbraith
2014-04-07 21:51 ` Sasha Levin
2014-04-08 9:10 ` Peter Zijlstra
2014-04-18 13:13 ` [tip:locking/core] lockdep: Increase " tip-bot for Sasha Levin
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