From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Hugh Dickins <hughd@google.com>
Cc: "Paul E. McKenney" <paul.mckenney@linaro.org>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: linux-next ppc64: RCU mods cause __might_sleep BUGs
Date: Tue, 01 May 2012 10:33:38 +1000 [thread overview]
Message-ID: <1335832418.20866.95.camel@pasglop> (raw)
In-Reply-To: <alpine.LSU.2.00.1204301451270.2986@eggly.anvils>
On Mon, 2012-04-30 at 15:37 -0700, Hugh Dickins wrote:
>
> BUG: sleeping function called from invalid context at include/linux/pagemap.h:354
> in_atomic(): 0, irqs_disabled(): 0, pid: 6886, name: cc1
Hrm ... in_atomic and irqs_disabled are both 0 ... so yeah it smells
like a preempt count problem... odd.
Did you get a specific bisect target yet ?
Cheers,
Ben.
> Call Trace:
> [c0000001a99f78e0] [c00000000000f34c] .show_stack+0x6c/0x16c (unreliable)
> [c0000001a99f7990] [c000000000077b40] .__might_sleep+0x11c/0x134
> [c0000001a99f7a10] [c0000000000c6228] .filemap_fault+0x1fc/0x494
> [c0000001a99f7af0] [c0000000000e7c9c] .__do_fault+0x120/0x684
> [c0000001a99f7c00] [c000000000025790] .do_page_fault+0x458/0x664
> [c0000001a99f7e30] [c000000000005868] handle_page_fault+0x10/0x30
>
> I've plenty more examples, most of them from page faults or from kswapd;
> but I don't think there's any more useful information in them.
>
> Anything I can try later on?
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Hugh Dickins <hughd@google.com>
Cc: "Paul E. McKenney" <paul.mckenney@linaro.org>,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: linux-next ppc64: RCU mods cause __might_sleep BUGs
Date: Tue, 01 May 2012 10:33:38 +1000 [thread overview]
Message-ID: <1335832418.20866.95.camel@pasglop> (raw)
In-Reply-To: <alpine.LSU.2.00.1204301451270.2986@eggly.anvils>
On Mon, 2012-04-30 at 15:37 -0700, Hugh Dickins wrote:
>
> BUG: sleeping function called from invalid context at include/linux/pagemap.h:354
> in_atomic(): 0, irqs_disabled(): 0, pid: 6886, name: cc1
Hrm ... in_atomic and irqs_disabled are both 0 ... so yeah it smells
like a preempt count problem... odd.
Did you get a specific bisect target yet ?
Cheers,
Ben.
> Call Trace:
> [c0000001a99f78e0] [c00000000000f34c] .show_stack+0x6c/0x16c (unreliable)
> [c0000001a99f7990] [c000000000077b40] .__might_sleep+0x11c/0x134
> [c0000001a99f7a10] [c0000000000c6228] .filemap_fault+0x1fc/0x494
> [c0000001a99f7af0] [c0000000000e7c9c] .__do_fault+0x120/0x684
> [c0000001a99f7c00] [c000000000025790] .do_page_fault+0x458/0x664
> [c0000001a99f7e30] [c000000000005868] handle_page_fault+0x10/0x30
>
> I've plenty more examples, most of them from page faults or from kswapd;
> but I don't think there's any more useful information in them.
>
> Anything I can try later on?
next prev parent reply other threads:[~2012-05-01 0:33 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-30 22:37 linux-next ppc64: RCU mods cause __might_sleep BUGs Hugh Dickins
2012-04-30 22:37 ` Hugh Dickins
2012-04-30 23:14 ` Paul E. McKenney
2012-04-30 23:14 ` Paul E. McKenney
2012-05-01 0:33 ` Benjamin Herrenschmidt [this message]
2012-05-01 0:33 ` Benjamin Herrenschmidt
2012-05-01 5:10 ` Hugh Dickins
2012-05-01 5:10 ` Hugh Dickins
2012-05-01 14:22 ` Paul E. McKenney
2012-05-01 14:22 ` Paul E. McKenney
2012-05-01 21:42 ` Hugh Dickins
2012-05-01 21:42 ` Hugh Dickins
2012-05-01 23:25 ` Paul E. McKenney
2012-05-01 23:25 ` Paul E. McKenney
2012-05-02 20:25 ` Hugh Dickins
2012-05-02 20:25 ` Hugh Dickins
2012-05-02 20:49 ` Paul E. McKenney
2012-05-02 20:49 ` Paul E. McKenney
2012-05-02 21:32 ` Paul E. McKenney
2012-05-02 21:32 ` Paul E. McKenney
2012-05-02 21:36 ` Paul E. McKenney
2012-05-02 21:36 ` Paul E. McKenney
2012-05-02 21:20 ` Benjamin Herrenschmidt
2012-05-02 21:20 ` Benjamin Herrenschmidt
2012-05-02 21:54 ` Paul E. McKenney
2012-05-02 21:54 ` Paul E. McKenney
2012-05-02 22:54 ` Hugh Dickins
2012-05-02 22:54 ` Hugh Dickins
2012-05-03 0:14 ` Paul E. McKenney
2012-05-03 0:14 ` Paul E. McKenney
2012-05-03 0:24 ` Hugh Dickins
2012-05-03 0:24 ` Hugh Dickins
2012-05-07 16:21 ` Hugh Dickins
2012-05-07 16:21 ` Hugh Dickins
2012-05-07 18:50 ` Paul E. McKenney
2012-05-07 18:50 ` Paul E. McKenney
2012-05-07 21:38 ` Hugh Dickins
2012-05-07 21:38 ` Hugh Dickins
2012-05-01 13:39 ` Paul E. McKenney
2012-05-01 13:39 ` Paul E. McKenney
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