From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [PATCH] Kernel panic on IA-64 Linux with SELinux
Date: Wed, 09 Jun 2004 21:55:07 +0000 [thread overview]
Message-ID: <16583.34619.1762.899096@napali.hpl.hp.com> (raw)
In-Reply-To: <013f01c44ddb$636d4aa0$f97d220a@linux.bs1.fc.nec.co.jp>
>>>>> On Wed, 09 Jun 2004 23:40:41 +0900, Kazuto MIYOSHI <miyoshi@linux.bs1.fc.nec.co.jp> said:
>> 2) We tried to set the current (r13) of cpu_idle to region 5
>> address. But it paniced and I could not grab the cause of the
>> panic. Is there any reason we must put init_task in region 5?
Kazuto> Please find the attached patch to make swapper to run on
Kazuto> region 5. It needs extra 2 instructions in ia64_switch_to()
Kazuto> to stop mapping of task stack if we are switching to idle,
Kazuto> to avoid TLB entry duplication caused by kernel text/data
Kazuto> mapping and CURRENT_STACK mapping.
Kazuto> I believe swapper (init_task) should be consistent for its
Kazuto> all members, not only for wait_chldexit, and the patch will
Kazuto> solve other potential list_head/current in-consistency
Kazuto> raised by swapper initialization, though I am not so sure if
Kazuto> it justifies extra instructions and complication in context
Kazuto> switch.
That is in my opinion a worse patch compared to the reinitialization
that you proposed esterday. Tony, what's your take on this problem?
--david
next prev parent reply other threads:[~2004-06-09 21:55 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-09 4:36 [PATCH] Kernel panic on IA-64 Linux with SELinux
2004-06-09 14:40 ` Kazuto MIYOSHI
2004-06-09 21:55 ` David Mosberger [this message]
2004-06-09 22:44 ` Luck, Tony
2004-06-09 23:25 ` David Mosberger
2004-06-09 23:35 ` Luck, Tony
2004-06-10 0:58 ` David Mosberger
2004-06-10 5:19 ` Luck, Tony
2004-06-10 5:23 ` David Mosberger
2004-06-10 5:28 ` Luck, Tony
2004-06-15 2:28 ` Kaigai Kohei
2004-06-15 4:17 ` Luck, Tony
2004-06-15 4:23 ` David Mosberger
2004-06-15 4:25 ` Luck, Tony
2004-06-15 4:25 ` David Mosberger
2004-06-15 9:37 ` Kaigai Kohei
2004-06-15 12:52 ` Kaigai Kohei
2004-06-17 1:10 ` David Mosberger
[not found] <Xine.LNX.4.44.0406101657420.8385-100000@thoron.boston.redhat.com>
2004-06-11 1:13 ` Kaigai Kohei
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