linux-kernel - Re: mmotm 2013-02-19-17-20 uploaded

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Message-ID: <512668FA.5040505@sgi.com>
Date:	Thu, 21 Feb 2013 12:35:38 -0600
From:	Nathan Zimmer <nzimmer@....com>
To:	Stephen Boyd <sboyd@...eaurora.org>
CC:	<akpm@...ux-foundation.org>, <mm-commits@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: mmotm 2013-02-19-17-20 uploaded

On 02/21/2013 12:27 PM, Stephen Boyd wrote:
> On 2/21/2013 10:18 AM, Nathan Zimmer wrote:
>> On Thu, Feb 21, 2013 at 01:25:29AM -0800, Stephen Boyd wrote:
>>> On 2/19/2013 5:21 PM, akpm@...ux-foundation.org wrote:
>>>> * timer_list-split-timer_list_show_tickdevices.patch
>>>> * timer_list-convert-timer-list-to-be-a-proper-seq_file.patch
>>>> * timer_list-convert-timer-list-to-be-a-proper-seq_file-fix.patch
>>>> * timer_list-convert-timer-list-to-be-a-proper-seq_file-v2.patch
>>>> * timer_list-convert-timer-list-to-be-a-proper-seq_file-v2-fix.patch
>>>> * timer_list-convert-timer-list-to-be-a-proper-seq_file-fix-fix.patch
>>> These commits seem to break the timer list on devices with maxcpus !=
>>> nr_cpu_ids, which is possible if you specify maxcpus on the kernel
>>> command line. I no longer see the percpu devices that I normally have
>>> after the broadcast device.
>> Interesting.
>> However I can't seem to boot at the moment with maxcpus set to less then the actual
>> number of cpus so I am not having much luck investigating right now.
> It works well on ARM processors. I believe it still works on x86 devices
> as well. I suppose you can simulate it by offlining a CPU and then
> reading the file.
Thanks I am seeing the failure now.
> This comment is useful around the cpumask functions.
>
>      Returns >= nr_cpu_ids if no further cpus set.
>
I had assumed it would be = nr_cpu_ids.
I will need to rethink the iterator.


Also I retested my other patches in the series, the ones for schedstat 
and sched_debug, and those worked fine.
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