linux-kernel - Re: [RFC PATCH v2] support ioctl for tunable user request

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 5 Sep 2011 17:49:27 +0900
From:	Kyungmin Park <kmpark@...radead.org>
To:	Jens Axboe <jaxboe@...ionio.com>
Cc:	Jaehoon Chung <jh80.chung@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd.bergmann@...aro.org>,
	Arnd Bergmann <arnd@...db.de>, Lin Ming <lxy@...pku.edu.cn>
Subject: Re: [RFC PATCH v2] support ioctl for tunable user request

Hi Jens,

Any comments on tunable user request concept for flash based storage?

Thank you,
Kyungmin Park

On Tue, Aug 30, 2011 at 12:17 AM, Lin Ming <lxy@...pku.edu.cn> wrote:
> On Mon, Aug 29, 2011 at 10:01 PM, Kyungmin Park <kmpark@...radead.org> wrote:
>> On Mon, Aug 29, 2011 at 7:11 PM, Jaehoon Chung <jh80.chung@...sung.com> wrote:
>>> Hi
>>>
>>> Lin Ming wrote:
>>>> On Mon, Aug 29, 2011 at 4:15 PM, Jaehoon Chung <jh80.chung@...sung.com> wrote:
>>>>> This patch is added the ioctl for tunable user request.
>>>>
>>>> Hi,
>>>>
>>>> What's the use case for this new ioctl?
>>
>> The below is the just mmc example.
>>
>> The main reason is that there's no way to know system or I/O idle, so
>> user provides the hint. Using user based I/O, device can TUNE the
>> device itself. In case of MMC, background operation can be used.
>>
>> and another difference from other user request, it's just trigger the
>> device tune request, no need to wait the request is done.
>
> OK.
>
> After read the previous patch at:
> http://marc.info/?l=linux-mmc&m=131407402925988&w=2
>
> I now get better understanding what "tunable user request" mean.
>
> Thanks.
>
>>
>> Thank you,
>> Kyungmin Park
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/