linux-kernel - Re: [tip:x86/xen] x86: use flush_tlb_others to implement flush_tlb

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Date:	Mon, 11 May 2009 17:40:34 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Ian Campbell <Ian.Campbell@...citrix.com>
Cc:	"mingo@...hat.com" <mingo@...hat.com>,
	"hpa@...or.com" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jeremy Fitzhardinge <Jeremy.Fitzhardinge@...rix.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"linux-tip-commits@...r.kernel.org" 
	<linux-tip-commits@...r.kernel.org>
Subject: Re: [tip:x86/xen] x86: use flush_tlb_others to implement
	flush_tlb_all, fix


sigh:

BUG: using smp_processor_id() in preemptible [00000000] code: S99local/1903
caller is flush_tlb_others_ipi+0x1b/0xc0
Pid: 1903, comm: S99local Not tainted 
2.6.30-rc5-tip-01485-g1304846-dirty #40905
Call Trace:
 [<40a9e184>] ? printk+0x1d/0x1f
 [<4066d2e6>] debug_smp_processor_id+0xc6/0xd0
 [<40422dab>] flush_tlb_others_ipi+0x1b/0xc0
 [<40422e5d>] native_flush_tlb_others+0xd/0x10
 [<40422ea9>] flush_tlb_all+0x19/0x60
 [<4041e972>] zap_low_mappings+0x52/0x60
 [<40a9b080>] native_cpu_up+0x156/0x220
 [<40a9ca42>] _cpu_up+0xb0/0x151
 [<40a9cb66>] cpu_up+0x83/0x8d
 [<40a68b90>] store_online+0x60/0xa0
 [<40a68b30>] ? store_online+0x0/0xa0
 [<4072ed8a>] sysdev_store+0x2a/0x40
 [<40522511>] sysfs_write_file+0xa1/0xf0
 [<404d9d44>] vfs_write+0xa4/0x130
 [<4065fcec>] ? trace_hardirqs_on_thunk+0xc/0x10
 [<40522470>] ? sysfs_write_file+0x0/0xf0
 [<404d9ea2>] sys_write+0x42/0x70
 [<40403bc8>] sysenter_do_call+0x12/0x3c
CPU0 attaching NULL sched-domain.

	Ingo
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