From: Tokunori Ikegami <ikegami.t@gmail.com>
To: Keith Busch <kbusch@kernel.org>
Cc: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>
Subject: Re: [PATCH] block, nvme: Increase max segments parameter setting value
Date: Sat, 28 Mar 2020 02:50:43 +0900 [thread overview]
Message-ID: <dc3a3e88-f062-b7df-dd18-18fb76e68e0c@gmail.com> (raw)
In-Reply-To: <6b73db44-ca3f-4285-0c91-dc1b1a5ca9f1@gmail.com>
On 2020/03/25 1:51, Tokunori Ikegami wrote:
>
> On 2020/03/24 9:02, Keith Busch wrote:
>> On Tue, Mar 24, 2020 at 08:09:19AM +0900, Tokunori Ikegami wrote:
>>> Hi,
>>>> The change looks okay, but why do we need such a large data length ?
>>>>
>>>> Do you have a use-case or performance numbers ?
>>> We use the large data length to get log page by the NVMe admin command.
>>> In the past it was able to get with the same length but failed
>>> currently
>>> with it.
>>>
>>> So it seems that depended on the kernel version as caused by the
>>> version up.
>> We didn't have 32-bit max segments before, though. Why was 16-bits
>> enough in older kernels? Which kernel did this stop working?
> Now I am asking the detail information to the reporter so let me
> update later.
> That was able to use the same command script with the large data
> length in the past.
I have just confirmed the detail so let me update below.
The data length 20,531,712 (0x1394A00) is used on kernel 3.10.0 (CentOS
64bit).
Also it is failed on kernel 10 4.10.0 (Ubuntu 32bit).
But just confirmed it as succeeded on both 4.15.0 (Ubuntu 32bit) and
4.15.1 (Ubuntu 64bit).
So the original 20,531,712 length failure issue seems already resolved.
I tested the data length 0x10000000 (268,435,456) and it is failed
But now confirmed it as failed on all the above kernel versions.
Also the patch fixes only this 0x10000000 length failure issue.
There was confused and sorry for that.
Regards,
Ikegami
WARNING: multiple messages have this Message-ID (diff)
From: Tokunori Ikegami <ikegami.t@gmail.com>
To: Keith Busch <kbusch@kernel.org>
Cc: "linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>
Subject: Re: [PATCH] block, nvme: Increase max segments parameter setting value
Date: Sat, 28 Mar 2020 02:50:43 +0900 [thread overview]
Message-ID: <dc3a3e88-f062-b7df-dd18-18fb76e68e0c@gmail.com> (raw)
In-Reply-To: <6b73db44-ca3f-4285-0c91-dc1b1a5ca9f1@gmail.com>
On 2020/03/25 1:51, Tokunori Ikegami wrote:
>
> On 2020/03/24 9:02, Keith Busch wrote:
>> On Tue, Mar 24, 2020 at 08:09:19AM +0900, Tokunori Ikegami wrote:
>>> Hi,
>>>> The change looks okay, but why do we need such a large data length ?
>>>>
>>>> Do you have a use-case or performance numbers ?
>>> We use the large data length to get log page by the NVMe admin command.
>>> In the past it was able to get with the same length but failed
>>> currently
>>> with it.
>>>
>>> So it seems that depended on the kernel version as caused by the
>>> version up.
>> We didn't have 32-bit max segments before, though. Why was 16-bits
>> enough in older kernels? Which kernel did this stop working?
> Now I am asking the detail information to the reporter so let me
> update later.
> That was able to use the same command script with the large data
> length in the past.
I have just confirmed the detail so let me update below.
The data length 20,531,712 (0x1394A00) is used on kernel 3.10.0 (CentOS
64bit).
Also it is failed on kernel 10 4.10.0 (Ubuntu 32bit).
But just confirmed it as succeeded on both 4.15.0 (Ubuntu 32bit) and
4.15.1 (Ubuntu 64bit).
So the original 20,531,712 length failure issue seems already resolved.
I tested the data length 0x10000000 (268,435,456) and it is failed
But now confirmed it as failed on all the above kernel versions.
Also the patch fixes only this 0x10000000 length failure issue.
There was confused and sorry for that.
Regards,
Ikegami
_______________________________________________
linux-nvme mailing list
linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme
next prev parent reply other threads:[~2020-03-27 17:50 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-23 18:23 [PATCH] block, nvme: Increase max segments parameter setting value Tokunori Ikegami
2020-03-23 18:23 ` Tokunori Ikegami
2020-03-23 19:14 ` Chaitanya Kulkarni
2020-03-23 19:14 ` Chaitanya Kulkarni
2020-03-23 23:09 ` Tokunori Ikegami
2020-03-23 23:09 ` Tokunori Ikegami
2020-03-24 0:02 ` Keith Busch
2020-03-24 0:02 ` Keith Busch
2020-03-24 16:51 ` Tokunori Ikegami
2020-03-24 16:51 ` Tokunori Ikegami
2020-03-27 17:50 ` Tokunori Ikegami [this message]
2020-03-27 17:50 ` Tokunori Ikegami
2020-03-27 18:18 ` Keith Busch
2020-03-27 18:18 ` Keith Busch
2020-03-28 2:11 ` Ming Lei
2020-03-28 2:11 ` Ming Lei
2020-03-28 3:13 ` Keith Busch
2020-03-28 3:13 ` Keith Busch
2020-03-28 8:28 ` Ming Lei
2020-03-28 8:28 ` Ming Lei
2020-03-28 12:57 ` Tokunori Ikegami
2020-03-28 12:57 ` Tokunori Ikegami
2020-03-29 3:01 ` Ming Lei
2020-03-29 3:01 ` Ming Lei
2020-03-30 9:15 ` Tokunori Ikegami
2020-03-30 9:15 ` Tokunori Ikegami
2020-03-30 13:53 ` Keith Busch
2020-03-30 13:53 ` Keith Busch
2020-03-31 15:24 ` Tokunori Ikegami
2020-03-31 15:24 ` Tokunori Ikegami
2020-03-31 14:13 ` Joshi
2020-03-31 14:13 ` Joshi
2020-03-31 15:37 ` Tokunori Ikegami
2020-03-31 15:37 ` Tokunori Ikegami
2020-03-24 7:16 ` Hannes Reinecke
2020-03-24 7:16 ` Hannes Reinecke
2020-03-24 17:17 ` Tokunori Ikegami
2020-03-24 17:17 ` Tokunori Ikegami
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=dc3a3e88-f062-b7df-dd18-18fb76e68e0c@gmail.com \
--to=ikegami.t@gmail.com \
--cc=Chaitanya.Kulkarni@wdc.com \
--cc=kbusch@kernel.org \
--cc=linux-block@vger.kernel.org \
--cc=linux-nvme@lists.infradead.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.