linux-kernel - Re: [tip:x86/urgent] x86/mm/cpa: Convert noop to functional fix

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Date:	Thu, 11 Apr 2013 14:29:18 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	tip-bot for Andrea Arcangeli <tipbot@...or.com>
Cc:	linux-tip-commits@...r.kernel.org, linux-kernel@...r.kernel.org,
	hpa@...or.com, apw@...onical.com, bp@...en8.de,
	stefan.bader@...onical.com, aarcange@...hat.com, mgorman@...e.de,
	tglx@...utronix.de
Subject: Re: [tip:x86/urgent] x86/mm/cpa: Convert noop to functional fix



* tip-bot for Andrea Arcangeli <tipbot@...or.com> wrote:

> Commit-ID:  f76cfa3c2496c462b5bc01bd0c9340c2715b73ca
> Gitweb:     http://git.kernel.org/tip/f76cfa3c2496c462b5bc01bd0c9340c2715b73ca
> Author:     Andrea Arcangeli <aarcange@...hat.com>
> AuthorDate: Wed, 10 Apr 2013 15:28:25 +0200
> Committer:  Ingo Molnar <mingo@...nel.org>
> CommitDate: Thu, 11 Apr 2013 10:34:42 +0200
> 
> x86/mm/cpa: Convert noop to functional fix

I think it's this commit that causes the following cpa-selftest failure:

CPA self-test:
ffff880038000000 level 2 but not PSE 8000000038000062
ffff880038200000 level 2 but not PSE 8000000038200062
ffff880038400000 level 2 but not PSE 8000000038400062
ffff880038600000 level 2 but not PSE 8000000038600062
ffff880038800000 level 2 but not PSE 8000000038800062
ffff880038a00000 level 2 but not PSE 8000000038a00062
ffff880038c00000 level 2 but not PSE 8000000038c00062
ffff880038e00000 level 2 but not PSE 8000000038e00062

...

 4k 134128 large 250 gb 0 x 1[ffff88000009a000-ffff88000009a000] miss 0
------------[ cut here ]------------
WARNING: at arch/x86/mm/pageattr-test.c:226 pageattr_test+0x3e1/0x410()
NOT PASSED. Please report.
Pid: 32, comm: pageattr-test Not tainted 3.9.0-rc6+ #222036
Call Trace:
 [<ffffffff8104fdd3>] warn_slowpath_common+0x62/0x7b
 [<ffffffff8104fe5a>] warn_slowpath_fmt+0x46/0x48
 [<ffffffff8102b3d9>] ? lookup_address+0xad/0x127
 [<ffffffff8102c766>] pageattr_test+0x3e1/0x410
 [<ffffffff8102c795>] ? pageattr_test+0x410/0x410
 [<ffffffff8102c7af>] do_pageattr_test+0x1a/0x3d
 [<ffffffff81070a8d>] kthread+0xa2/0xaa
 [<ffffffff810709eb>] ? __kthread_parkme+0x65/0x65
 [<ffffffff81aad73c>] ret_from_fork+0x7c/0xb0
 [<ffffffff810709eb>] ? __kthread_parkme+0x65/0x65
---[ end trace 582fec3a45bb42b7 ]---
device: 'vcs2': device_add

Thanks,

	Ingo
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