From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Andrew Morton <akpm@osdl.org>
Cc: Miles Lane <miles.lane@gmail.com>,
linux-kernel@vger.kernel.org, Greg KH <greg@kroah.com>,
Dominik Brodowski <linux@dominikbrodowski.net>,
Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: 2.6.15-rc5-mm3 -- BUG: using smp_processor_id() in preemptible [00000001] code: swapper/1
Date: Thu, 15 Dec 2005 20:06:30 +1100 [thread overview]
Message-ID: <43A13216.8000104@yahoo.com.au> (raw)
In-Reply-To: <20051215004028.0bf9791f.akpm@osdl.org>
Andrew Morton wrote:
>>A little later, I get this:
>>
>>[4294676.542000] BUG: using smp_processor_id() in preemptible
>>[00000001] code: rcS/942
>>[4294676.542000] caller is mod_page_state_offset+0x12/0x28
>>[4294676.542000] [<c1003723>] dump_stack+0x16/0x1a
>>[4294676.554000] [<c110c1eb>] debug_smp_processor_id+0x77/0x90
>>[4294676.565000] [<c10413d3>] mod_page_state_offset+0x12/0x28
>>[4294676.577000] [<c104911b>] __handle_mm_fault+0x1f/0x18e
>>[4294676.589000] [<c1013d7f>] do_page_fault+0x170/0x492
>>[4294676.600000] [<c10033f7>] error_code+0x4f/0x54
>>[4294676.612000] [<c10027ae>] ret_from_fork+0x6/0x14
>
>
> Nick.
>
>
Silly me, it is doing the local_irq_save *after* the __get_cpu_var.
Sorry for the typo. However the bug is harmless and will just result
in skewed statistics in the very rare chance of a race.
Thanks for reporting.
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next prev parent reply other threads:[~2005-12-15 9:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-15 8:35 2.6.15-rc5-mm3 -- BUG: using smp_processor_id() in preemptible [00000001] code: swapper/1 Miles Lane
2005-12-15 8:40 ` Andrew Morton
2005-12-15 9:00 ` Andrew Morton
2005-12-15 18:48 ` Dave Jones
2005-12-15 9:06 ` Nick Piggin [this message]
2005-12-15 18:20 ` 2.6.15-rc5-mm3 -- bus may be hidden warning Dominik Brodowski
2005-12-15 8:40 ` 2.6.15-rc5-mm3 -- BUG: using smp_processor_id() in preemptible [00000001] code: swapper/1 Miles Lane
2005-12-15 12:24 ` Alan Cox
2005-12-15 16:33 ` Michal Piotrowski
2005-12-17 20:33 ` Miles Lane
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