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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Alex Thorlton <athorlton@sgi.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Ingo Molnar <mingo@redhat.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
	"Eric W . Biederman" <ebiederm@xmission.com>,
	"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
	Al Viro <viro@zeniv.linux.org.uk>,
	Andi Kleen <ak@linux.intel.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Dave Jones <davej@redhat.com>,
	David Howells <dhowells@redhat.com>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Kees Cook <keescook@chromium.org>, Mel Gorman <mgorman@suse.de>,
	Michael Kerrisk <mtk.manpages@gmail.com>,
	Oleg Nesterov <oleg@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Rik van Riel <riel@redhat.com>, Robin Holt <robinmholt@gmail.com>,
	Sedat Dilek <sedat.dilek@gmail.com>,
	Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCHv4 00/10] split page table lock for PMD tables
Date: Mon,  7 Oct 2013 12:48:20 +0300 (EEST)	[thread overview]
Message-ID: <20131007094820.13A0CE0090@blue.fi.intel.com> (raw)
In-Reply-To: <20131004203147.GE32110@sgi.com>

Alex Thorlton wrote:
> > > Sorry for the delay on these results.  I hit some strange issues with
> > > running thp_memscale on systems with either of the following
> > > combinations of configuration options set:
> > > 
> > > [thp off]
> > > HUGETLBFS=y
> > > HUGETLB_PAGE=y
> > > NUMA_BALANCING=y
> > > NUMA_BALANCING_DEFAULT_ENABLED=y
> > > 
> > > [thp on or off]
> > > HUGETLBFS=n
> > > HUGETLB_PAGE=n
> > > NUMA_BALANCING=y
> > > NUMA_BALANCING_DEFAULT_ENABLED=y
> > > 
> > > I'm getting segfaults intermittently, as well as some weird RCU sched
> > > errors.  This happens in vanilla 3.12-rc2, so it doesn't have anything
> > > to do with your patches, but I thought I'd let you know.  There didn't
> > > used to be any issues with this test, so I think there's a subtle kernel
> > > bug here.  That's, of course, an entirely separate issue though.
> > 
> > I'll take a look next week, if nobody does it before.
> 
> I'm starting a bisect now.  Not sure how long it'll take, but I'll keep
> you posted.

I don't see the issue. Could you share your kernel config?

-- 
 Kirill A. Shutemov

WARNING: multiple messages have this Message-ID (diff)
From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Alex Thorlton <athorlton@sgi.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Ingo Molnar <mingo@redhat.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
	"Eric W . Biederman" <ebiederm@xmission.com>,
	"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
	Al Viro <viro@zeniv.linux.org.uk>,
	Andi Kleen <ak@linux.intel.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Dave Jones <davej@redhat.com>,
	David Howells <dhowells@redhat.com>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Kees Cook <keescook@chromium.org>, Mel Gorman <mgorman@suse.de>,
	Michael Kerrisk <mtk.manpages@gmail.com>,
	Oleg Nesterov <oleg@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Rik van Riel <riel@redhat.com>, Robin Holt <robinmholt@gmail.com>,
	Sedat Dilek <sedat.dilek@gmail.com>,
	Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCHv4 00/10] split page table lock for PMD tables
Date: Mon,  7 Oct 2013 12:48:20 +0300 (EEST)	[thread overview]
Message-ID: <20131007094820.13A0CE0090@blue.fi.intel.com> (raw)
In-Reply-To: <20131004203147.GE32110@sgi.com>

Alex Thorlton wrote:
> > > Sorry for the delay on these results.  I hit some strange issues with
> > > running thp_memscale on systems with either of the following
> > > combinations of configuration options set:
> > > 
> > > [thp off]
> > > HUGETLBFS=y
> > > HUGETLB_PAGE=y
> > > NUMA_BALANCING=y
> > > NUMA_BALANCING_DEFAULT_ENABLED=y
> > > 
> > > [thp on or off]
> > > HUGETLBFS=n
> > > HUGETLB_PAGE=n
> > > NUMA_BALANCING=y
> > > NUMA_BALANCING_DEFAULT_ENABLED=y
> > > 
> > > I'm getting segfaults intermittently, as well as some weird RCU sched
> > > errors.  This happens in vanilla 3.12-rc2, so it doesn't have anything
> > > to do with your patches, but I thought I'd let you know.  There didn't
> > > used to be any issues with this test, so I think there's a subtle kernel
> > > bug here.  That's, of course, an entirely separate issue though.
> > 
> > I'll take a look next week, if nobody does it before.
> 
> I'm starting a bisect now.  Not sure how long it'll take, but I'll keep
> you posted.

I don't see the issue. Could you share your kernel config?

-- 
 Kirill A. Shutemov

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  reply	other threads:[~2013-10-07  9:48 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-27 13:16 [PATCHv4 00/10] split page table lock for PMD tables Kirill A. Shutemov
2013-09-27 13:16 ` Kirill A. Shutemov
2013-09-27 13:16 ` [PATCHv4 01/10] mm: rename USE_SPLIT_PTLOCKS to USE_SPLIT_PTE_PTLOCKS Kirill A. Shutemov
2013-09-27 13:16   ` Kirill A. Shutemov
2013-09-27 13:16 ` [PATCHv4 02/10] mm: convert mm->nr_ptes to atomic_t Kirill A. Shutemov
2013-09-27 13:16   ` Kirill A. Shutemov
2013-09-27 20:46   ` Cody P Schafer
2013-09-27 20:46     ` Cody P Schafer
2013-09-27 21:01     ` Dave Hansen
2013-09-27 21:01       ` Dave Hansen
2013-09-27 22:24     ` Kirill A. Shutemov
2013-09-28  0:13       ` Johannes Weiner
2013-09-28  0:13         ` Johannes Weiner
2013-09-28 16:12         ` Kirill A. Shutemov
2013-09-27 13:16 ` [PATCHv4 03/10] mm: introduce api for split page table lock for PMD level Kirill A. Shutemov
2013-09-27 13:16   ` Kirill A. Shutemov
2013-09-27 13:16 ` [PATCHv4 04/10] mm, thp: change pmd_trans_huge_lock() to return taken lock Kirill A. Shutemov
2013-09-27 13:16   ` Kirill A. Shutemov
2013-09-27 13:16 ` [PATCHv4 05/10] mm, thp: move ptl taking inside page_check_address_pmd() Kirill A. Shutemov
2013-09-27 13:16   ` Kirill A. Shutemov
2013-09-27 13:16 ` [PATCHv4 06/10] mm, thp: do not access mm->pmd_huge_pte directly Kirill A. Shutemov
2013-09-27 13:16   ` Kirill A. Shutemov
2013-09-27 13:16 ` [PATCHv4 07/10] mm, hugetlb: convert hugetlbfs to use split pmd lock Kirill A. Shutemov
2013-09-27 13:16   ` Kirill A. Shutemov
2013-09-27 13:16 ` [PATCHv4 08/10] mm: convent the rest to new page table lock api Kirill A. Shutemov
2013-09-27 13:16   ` Kirill A. Shutemov
2013-09-27 13:16 ` [PATCHv4 09/10] mm: implement split page table lock for PMD level Kirill A. Shutemov
2013-09-27 13:16   ` Kirill A. Shutemov
2013-10-03 23:11   ` Andrew Morton
2013-10-03 23:11     ` Andrew Morton
2013-10-03 23:38     ` Kirill A. Shutemov
2013-10-03 23:38       ` Kirill A. Shutemov
2013-10-04  0:34       ` Kirill A. Shutemov
2013-10-04  7:21     ` Peter Zijlstra
2013-10-04  7:21       ` Peter Zijlstra
2013-10-03 23:42   ` Kirill A. Shutemov
2013-09-27 13:16 ` [PATCHv4 10/10] x86, mm: enable " Kirill A. Shutemov
2013-09-27 13:16   ` Kirill A. Shutemov
2013-10-04 20:12 ` [PATCHv4 00/10] split page table lock for PMD tables Alex Thorlton
2013-10-04 20:12   ` Alex Thorlton
2013-10-04 20:26   ` Kirill A. Shutemov
2013-10-04 20:26     ` Kirill A. Shutemov
2013-10-04 20:31     ` Alex Thorlton
2013-10-04 20:31       ` Alex Thorlton
2013-10-07  9:48       ` Kirill A. Shutemov [this message]
2013-10-07  9:48         ` Kirill A. Shutemov
2013-10-08 21:47         ` Alex Thorlton
2013-10-08 21:47           ` Alex Thorlton

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