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From: Dave Hansen <dave.hansen@intel.com>
To: Ingo Molnar <mingo@kernel.org>,
	Dave Hansen <dave.hansen@linux.intel.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	linuxram@us.ibm.com, tglx@linutronix.de, mpe@ellerman.id.au,
	akpm@linux-foundation.org, shuah@kernel.org, shakeelb@google.com
Subject: Re: [PATCH 0/9] [v3] x86, pkeys: two protection keys bug fixes
Date: Mon, 30 Apr 2018 08:30:43 -0700	[thread overview]
Message-ID: <a176ae33-eb01-d275-f372-a33829e865a7@intel.com> (raw)
In-Reply-To: <20180428070553.yjlt22sb6ntcaqnc@gmail.com>

On 04/28/2018 12:05 AM, Ingo Molnar wrote:
> In the above kernel that was missing the PROT_EXEC fix I was repeatedly running 
> the 64-bit and 32-bit testcases as non-root and as root as well, until I got a 
> hang in the middle of a 32-bit test running as root:
> 
>   test  7 PASSED (iteration 19)
>   test  8 PASSED (iteration 19)
>   test  9 PASSED (iteration 19)
> 
>   < test just hangs here >

For the hang, there is a known issue with the use of printf() in the
signal handler and a resulting deadlock.  I *thought* there was a patch
merged to fix this from Ram Pai or one of the other IBM folks.

  parent reply	other threads:[~2018-04-30 15:30 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-27 17:45 Dave Hansen
2018-04-27 17:45 ` [PATCH 1/9] x86, pkeys: do not special case protection key 0 Dave Hansen
2018-04-27 17:45 ` [PATCH 2/9] x86, pkeys, selftests: save off 'prot' for allocations Dave Hansen
2018-04-27 17:45 ` [PATCH 3/9] x86, pkeys, selftests: add a test for pkey 0 Dave Hansen
2018-04-27 17:45 ` [PATCH 4/9] x86, pkeys: override pkey when moving away from PROT_EXEC Dave Hansen
2018-04-27 17:45 ` [PATCH 5/9] x86, pkeys, selftests: fix pointer math Dave Hansen
2018-04-27 17:45 ` [PATCH 6/9] x86, pkeys, selftests: fix pkey exhaustion test off-by-one Dave Hansen
2018-04-27 17:45 ` [PATCH 7/9] x86, pkeys, selftests: factor out "instruction page" Dave Hansen
2018-04-27 17:45 ` [PATCH 8/9] x86, pkeys, selftests: add allow faults on unknown keys Dave Hansen
2018-04-27 17:45 ` [PATCH 9/9] x86, pkeys, selftests: add PROT_EXEC test Dave Hansen
2018-04-28  7:05 ` [PATCH 0/9] [v3] x86, pkeys: two protection keys bug fixes Ingo Molnar
2018-04-28  7:15   ` Ingo Molnar
2018-04-28  8:29     ` Ingo Molnar
2018-04-30 15:30   ` Dave Hansen [this message]
2018-04-30 16:28     ` Ram Pai
2018-05-08 22:49   ` Dave Hansen

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