ux.intel.com;
> mi...@kernel.org; linux-kernel@vger.kernel.org; gre...@linuxfoundation.org;
> Tu, Xiaobing
> Subject: Re: Add memory barrier when waiting on futex
>
> On Tue, Nov 26, 2013 at 01:07:25AM +, Ma, Xindong wrote:
> > I've already aware that they've prot
On Tue, Nov 26, 2013 at 01:07:25AM +, Ma, Xindong wrote:
> [ 1038.694701] putmetho-11202 1...1 1035007289001: futex_wait: LEON, wait
> ==, addr:41300384, pid:11202
> [ 1038.694716] putmetho-11202 1...1 1035007308860: futex_wait_queue_me:
> LEON, q->task => 11202
> [ 1038.694731]
On Tue, Nov 26, 2013 at 01:07:25AM +, Ma, Xindong wrote:
> I've already aware that they've protected by spinlock, this is why I adding a
> memory barrier to fix it.
That doesn't make sense.. the spinlocks should provide the required
serialization, there's nothing to fix.
> I reproduced this
On Tue, Nov 26, 2013 at 01:07:25AM +, Ma, Xindong wrote:
I've already aware that they've protected by spinlock, this is why I adding a
memory barrier to fix it.
That doesn't make sense.. the spinlocks should provide the required
serialization, there's nothing to fix.
I reproduced this
On Tue, Nov 26, 2013 at 01:07:25AM +, Ma, Xindong wrote:
[ 1038.694701] putmetho-11202 1...1 1035007289001: futex_wait: LEON, wait
==, addr:41300384, pid:11202
[ 1038.694716] putmetho-11202 1...1 1035007308860: futex_wait_queue_me:
LEON, q-task = 11202
[ 1038.694731] SharedPr-11272
...@kernel.org; linux-kernel@vger.kernel.org; gre...@linuxfoundation.org;
Tu, Xiaobing
Subject: Re: Add memory barrier when waiting on futex
On Tue, Nov 26, 2013 at 01:07:25AM +, Ma, Xindong wrote:
I've already aware that they've protected by spinlock, this is why I adding
a
memory barrier
ux.intel.com;
> mi...@kernel.org; linux-kernel@vger.kernel.org; gre...@linuxfoundation.org;
> Tu, Xiaobing
> Subject: Re: Add memory barrier when waiting on futex
>
> On Mon, Nov 25, 2013 at 01:15:17PM +, Ma, Xindong wrote:
> > We encountered following panic several times:
>
On Mon, 2013-11-25 at 15:39 +0100, Peter Zijlstra wrote:
> On Mon, Nov 25, 2013 at 01:15:17PM +, Ma, Xindong wrote:
> > We encountered following panic several times:
>
> > [ 74.671982] BUG: unable to handle kernel NULL pointer dereference at
> > 0008
> > [ 74.672101] IP: []
On Mon, Nov 25, 2013 at 01:15:17PM +, Ma, Xindong wrote:
> We encountered following panic several times:
> [ 74.671982] BUG: unable to handle kernel NULL pointer dereference at
> 0008
> [ 74.672101] IP: [] wake_futex+0x47/0x80
> [ 74.674144] [] futex_wake+0xc9/0x110
> [
On Mon, Nov 25, 2013 at 01:15:17PM +, Ma, Xindong wrote:
> We encountered following panic several times:
> [ 74.671982] BUG: unable to handle kernel NULL pointer dereference at
> 0008
> [ 74.672101] IP: [] wake_futex+0x47/0x80
> [ 74.672185] *pdpt = 10108001 *pde =
We encountered following panic several times:
[ 74.671982] BUG: unable to handle kernel NULL pointer dereference at 0008
[ 74.672101] IP: [] wake_futex+0x47/0x80
[ 74.672185] *pdpt = 10108001 *pde =
[ 74.672278] Oops: 0002 [#1] PREEMPT SMP
[ 74.672403]
We encountered following panic several times:
[ 74.671982] BUG: unable to handle kernel NULL pointer dereference at 0008
[ 74.672101] IP: [c129bb27] wake_futex+0x47/0x80
[ 74.672185] *pdpt = 10108001 *pde =
[ 74.672278] Oops: 0002 [#1] PREEMPT SMP
[
On Mon, Nov 25, 2013 at 01:15:17PM +, Ma, Xindong wrote:
We encountered following panic several times:
[ 74.671982] BUG: unable to handle kernel NULL pointer dereference at
0008
[ 74.672101] IP: [c129bb27] wake_futex+0x47/0x80
[ 74.672185] *pdpt = 10108001 *pde =
On Mon, Nov 25, 2013 at 01:15:17PM +, Ma, Xindong wrote:
We encountered following panic several times:
[ 74.671982] BUG: unable to handle kernel NULL pointer dereference at
0008
[ 74.672101] IP: [c129bb27] wake_futex+0x47/0x80
[ 74.674144] [c129bc29] futex_wake+0xc9/0x110
[
On Mon, 2013-11-25 at 15:39 +0100, Peter Zijlstra wrote:
On Mon, Nov 25, 2013 at 01:15:17PM +, Ma, Xindong wrote:
We encountered following panic several times:
[ 74.671982] BUG: unable to handle kernel NULL pointer dereference at
0008
[ 74.672101] IP: [c129bb27]
...@kernel.org; linux-kernel@vger.kernel.org; gre...@linuxfoundation.org;
Tu, Xiaobing
Subject: Re: Add memory barrier when waiting on futex
On Mon, Nov 25, 2013 at 01:15:17PM +, Ma, Xindong wrote:
We encountered following panic several times:
[ 74.671982] BUG: unable to handle kernel NULL
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