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
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
WARNING: multiple messages have this Message-ID (diff)
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
next prev parent reply other threads:[~2014-11-18 16:56 UTC|newest]
Thread overview: 43+ 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 13:32 ` 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 ` 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 ` 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 ` 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 ` 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 ` Mel Gorman
2014-11-14 13:33 ` [PATCH 6/7] x86: mm: Restore original pte_special check Mel Gorman
2014-11-14 13:33 ` Mel Gorman
2014-11-14 13:33 ` [PATCH 7/7] mm: numa: Add paranoid check around pte_protnone_numa Mel Gorman
2014-11-14 13:33 ` Mel Gorman
2014-11-15 1:41 ` [RFC PATCH 0/7] Replace _PAGE_NUMA with PAGE_NONE protections Linus Torvalds
2014-11-15 1:41 ` Linus Torvalds
2014-11-15 3:29 ` Sasha Levin
2014-11-15 3:29 ` Sasha Levin
2014-11-18 15:42 ` Mel Gorman
2014-11-18 15:42 ` Mel Gorman
2014-11-18 16:33 ` Sasha Levin
2014-11-18 16:33 ` Sasha Levin
2014-11-18 16:56 ` Aneesh Kumar K.V [this message]
2014-11-18 16:56 ` Aneesh Kumar K.V
2014-11-18 17:14 ` Mel Gorman
2014-11-18 17:14 ` Mel Gorman
2014-11-18 17:18 ` Sasha Levin
2014-11-19 13:14 ` Mel Gorman
2014-11-19 13:14 ` Mel Gorman
2014-11-17 8:26 ` Aneesh Kumar K.V
2014-11-17 8:26 ` Aneesh Kumar K.V
2014-11-17 8:26 ` Aneesh Kumar K.V
2014-11-18 16:01 ` Mel Gorman
2014-11-18 16:01 ` Mel Gorman
2014-11-18 16:01 ` Mel Gorman
2014-11-18 16:33 ` Aneesh Kumar K.V
2014-11-18 16:33 ` Aneesh Kumar K.V
2014-11-18 16:33 ` Aneesh Kumar K.V
2014-11-18 17:08 ` Mel Gorman
2014-11-18 17:08 ` Mel Gorman
2014-11-18 17:08 ` Mel Gorman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87tx1w78hi.fsf@linux.vnet.ibm.com \
--to=aneesh.kumar@linux.vnet.ibm.com \
--cc=davej@redhat.com \
--cc=hughd@google.com \
--cc=kirill.shutemov@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mgorman@suse.de \
--cc=mingo@redhat.com \
--cc=riel@redhat.com \
--cc=sasha.levin@oracle.com \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.