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Date:   Fri, 13 Mar 2020 22:53:24 -0400
From:   Qian Cai <>
To:     Peter Zijlstra <>
Cc:     Thomas Gleixner <>,
        John Stultz <>,,,,, Andy Lutomirski <>
Subject: Re: [PATCH] timer: silenct a lockdep splat with debugobjects

> On Mar 13, 2020, at 5:26 PM, Peter Zijlstra <> wrote:
> On Fri, Mar 13, 2020 at 05:00:41PM -0400, Qian Cai wrote:
>>> On Mar 13, 2020, at 4:13 PM, Peter Zijlstra <> wrote:
>>> Or, fix that random crud to do the wakeup outside of the lock.
>> That is likely to be difficult until we can find a creative way to not “uglifying" the
>> random code by dropping locks in the middle etc just because of debugojects.
> Doesn't look difficult at all.

Great. I cherry-picked the first two patches,

random: Consolidate entropy batches for u32 and u64
random: Remove batched entropy locking

which solved the issue here as well.

Andy, may I ask what your plan to post those?

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