From: Peter Zijlstra <peterz@infradead.org>
To: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>,
Alfredo Alvarez Fernandez <alfredoalvarezfernandez@gmail.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Theodore Ts'o <tytso@mit.edu>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [Linux-v4.6-rc1] ext4: WARNING: CPU: 2 PID: 2692 at kernel/locking/lockdep.c:2017 __lock_acquire+0x180e/0x2260
Date: Mon, 4 Apr 2016 18:02:41 +0200 [thread overview]
Message-ID: <20160404160241.GC3448@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CA+icZUX3=q8=HGfvDm8JT6dbZ7QZutFBQsCk96zARHt26eHy8w@mail.gmail.com>
On Mon, Apr 04, 2016 at 05:31:40PM +0200, Sedat Dilek wrote:
> > +/* https://en.wikipedia.org/wiki/Xorshift#xorshift.2A */
> > +#define UINT64_C(x) x##ULL
> > +static inline u64 xorshift64star(u64 x)
> > +{
> > + x ^= x >> 12; // a
> > + x ^= x << 25; // b
> > + x ^= x >> 27; // c
> > + return x * UINT64_C(2685821657736338717);
> > +}
> Will you push that also to peterz/queue.git#locking/urgent?
Only after I've had a play and observed it making any difference; Dmitry
supposedly has a reproducer, but I've not yet had a moment to try.
> - Sedat -
>
> P.S.: "lockdep: print chain_key collision information" in your above
> tree differs from the upstream one.
I'll drop mine, I just hadn't moved to the very latestestest tip.
next prev parent reply other threads:[~2016-04-04 16:02 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-27 8:15 [Linux-v4.6-rc1] ext4: WARNING: CPU: 2 PID: 2692 at kernel/locking/lockdep.c:2017 __lock_acquire+0x180e/0x2260 Sedat Dilek
2016-03-27 8:57 ` Sedat Dilek
2016-03-27 12:03 ` Linus Torvalds
2016-03-27 13:32 ` Boqun Feng
2016-03-27 18:23 ` Theodore Ts'o
2016-03-27 19:40 ` Sedat Dilek
[not found] ` <CA+55aFwoKRpgq8OCTxUaP+8gOg-mnN3nbruYgiK32a=C5U4TkQ@mail.gmail.com>
2016-03-27 20:24 ` Sedat Dilek
2016-03-27 20:48 ` Peter Zijlstra
2016-03-27 20:59 ` Sedat Dilek
2016-03-27 21:48 ` Sedat Dilek
2016-03-28 1:05 ` Boqun Feng
2016-03-28 6:33 ` Peter Zijlstra
2016-03-29 8:47 ` Ingo Molnar
2016-03-30 9:20 ` Sedat Dilek
2016-03-30 9:36 ` Sedat Dilek
2016-03-30 9:36 ` Peter Zijlstra
2016-03-30 9:49 ` Sedat Dilek
2016-03-30 10:33 ` Sedat Dilek
2016-03-30 12:43 ` Peter Zijlstra
2016-03-30 12:46 ` Sedat Dilek
2016-03-30 13:15 ` Peter Zijlstra
2016-03-30 9:50 ` Peter Zijlstra
2016-03-30 9:59 ` Boqun Feng
2016-03-30 10:36 ` Peter Zijlstra
2016-03-30 11:07 ` Sedat Dilek
2016-03-31 15:42 ` Peter Zijlstra
2016-03-31 15:52 ` Boqun Feng
2016-04-02 6:26 ` Sedat Dilek
2016-03-30 14:06 ` Peter Zijlstra
2016-03-30 15:21 ` Sedat Dilek
2016-03-30 17:03 ` [PATCH] lockdep: print chain_key collision information Alfredo Alvarez Fernandez
2016-03-30 17:19 ` Peter Zijlstra
2016-04-01 6:36 ` [tip:core/urgent] locking/lockdep: Print " tip-bot for Alfredo Alvarez Fernandez
2016-05-10 9:09 ` Peter Zijlstra
2016-04-04 15:31 ` [Linux-v4.6-rc1] ext4: WARNING: CPU: 2 PID: 2692 at kernel/locking/lockdep.c:2017 __lock_acquire+0x180e/0x2260 Sedat Dilek
2016-04-04 16:02 ` Peter Zijlstra [this message]
2016-05-09 11:37 ` Sedat Dilek
2016-06-03 15:15 ` Sedat Dilek
2016-04-23 12:54 ` [tip:locking/urgent] lockdep: Fix lock_chain::base size tip-bot for Peter Zijlstra
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