From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: Sasha Levin <sasha.levin@oracle.com>, Mel Gorman <mgorman@suse.de>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>, Hugh Dickins <hughd@google.com>,
Dave Jones <davej@redhat.com>, Rik van Riel <riel@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
Kirill Shutemov <kirill.shutemov@linux.intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [RFC PATCH 0/7] Replace _PAGE_NUMA with PAGE_NONE protections
Date: Tue, 18 Nov 2014 22:26:41 +0530 [thread overview]
Message-ID: <87tx1w78hi.fsf@linux.vnet.ibm.com> (raw)
In-Reply-To: <546B74F5.10004@oracle.com>
Sasha Levin <sasha.levin@oracle.com> writes:
> On 11/18/2014 10:42 AM, Mel Gorman wrote:
>> 1. I'm assuming this is a KVM setup but can you confirm?
>
> Yes.
>
>> 2. Are you using numa=fake=N?
>
> Yes. numa=fake=24, which is probably way more nodes on any physical machine
> than the new code was tested on?
>
>> 3. If you are using fake NUMA, what happens if you boot without it as
>> that should make the patches a no-op?
>
> Nope, still seeing it without fake numa.
>
>> 4. Similarly, does the kernel boot properly without without patches?
>
> Yes, the kernel works fine without the patches both with and without fake
> numa.
Hmm that is interesting. I am not sure how writeback_fid can be
related. We use writeback fid to enable client side caching with 9p
(cache=loose). We use this fid to write back dirty pages later. Can you
share the qemu command line used, 9p mount options and the test details ?
-aneesh
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next prev parent reply other threads:[~2014-11-18 16:56 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-14 13:32 [RFC PATCH 0/7] Replace _PAGE_NUMA with PAGE_NONE protections Mel Gorman
2014-11-14 13:33 ` [PATCH 1/7] mm: Add p[te|md] protnone helpers for use by NUMA balancing Mel Gorman
2014-11-14 13:33 ` [PATCH 2/7] mm: Convert p[te|md]_numa users to p[te|md]_protnone_numa Mel Gorman
2014-11-14 13:33 ` [PATCH 3/7] mm: Convert p[te|md]_mknonnuma and remaining page table manipulations Mel Gorman
2014-11-14 13:33 ` [PATCH 4/7] mm: Remove remaining references to NUMA hinting bits and helpers Mel Gorman
2014-11-14 13:33 ` [PATCH 5/7] mm: numa: Do not trap faults on the huge zero page Mel Gorman
2014-11-14 13:33 ` [PATCH 6/7] x86: mm: Restore original pte_special check Mel Gorman
2014-11-14 13:33 ` [PATCH 7/7] mm: numa: Add paranoid check around pte_protnone_numa Mel Gorman
2014-11-15 1:41 ` [RFC PATCH 0/7] Replace _PAGE_NUMA with PAGE_NONE protections Linus Torvalds
2014-11-15 3:29 ` Sasha Levin
2014-11-18 15:42 ` Mel Gorman
2014-11-18 16:33 ` Sasha Levin
2014-11-18 16:56 ` Aneesh Kumar K.V [this message]
2014-11-18 17:14 ` Mel Gorman
2014-11-18 17:18 ` Sasha Levin
2014-11-19 13:14 ` Mel Gorman
2014-11-17 8:26 ` Aneesh Kumar K.V
2014-11-18 16:01 ` Mel Gorman
2014-11-18 16:33 ` Aneesh Kumar K.V
2014-11-18 17:08 ` Mel Gorman
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