From: gshan <gshan@alcatel-lucent.com>
To: Satyam Sharma <satyam.sharma@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: bugs in __schedule()
Date: Tue, 26 Jun 2007 16:36:23 +0800 [thread overview]
Message-ID: <4680D007.3040007@alcatel-lucent.com> (raw)
In-Reply-To: <a781481a0706260125l76c5848aq85403a4ec94d57da@mail.gmail.com>
Satyam Sharma wrote:
> Hi Gavin,
>
> On 6/26/07, gshan <gshan@alcatel-lucent.com> wrote:
>> Here is the all output I have:
>>
>> # ifconfig mgt0 10.0.51.27
>> BUG: scheduling while atomic: exe/0x00000101/752
>
> Yup, you can't sleep in taskets, they're atomic.
>
>> caller is schedule+0x4c/0xe4
>> Call trace:
>> [c02dc4dc] __schedule+0x654/0x788
>> [c02dc6f4] schedule+0x4c/0xe4
>> [c02dbe24] __compat_down+0xc8/0x12c
>
> So, you can't use / acquire semaphores in them. Use spinlocks.
> If the shared data is also accessed from process context, use
> spin_lock_bh() from the process context code.
>
> Satyam
Thanks, Satyam. So I can replace the tasklet with kernel thread?
next prev parent reply other threads:[~2007-06-26 8:36 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-26 7:57 bugs in __schedule() gshan
2007-06-26 8:14 ` Alexey Dobriyan
2007-06-26 8:18 ` gshan
2007-06-26 8:18 ` Satyam Sharma
2007-06-26 8:20 ` gshan
2007-06-26 8:25 ` Satyam Sharma
2007-06-26 8:36 ` gshan [this message]
2007-06-26 8:50 ` Satyam Sharma
2007-06-26 8:55 ` gshan
2007-06-26 9:08 ` Satyam Sharma
2007-06-26 9:13 ` gshan
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