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]

Message-ID: <CAH9JG2UevPYDOFycLGbh+zu9CyoDx8N8qnCzMy0Lq2b+06EatA@mail.gmail.com>
Date:	Mon, 5 Sep 2011 20:47:58 +0900
From:	Kyungmin Park <kmpark@...radead.org>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Jens Axboe <jaxboe@...ionio.com>,
	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 Christoph,

On Mon, Sep 5, 2011 at 6:15 PM, Christoph Hellwig <hch@...radead.org> wrote:
> So what the heck is a tunable request supposed to be?  How does it
> qualify for beeing a generic request/bio type?

The concept is similar with DISCARD request except no-wait for request complete

 #define REQ_DISCARD            (1 << __REQ_DISCARD)
+#define REQ_TUNE               (1 << __REQ_TUNE)

As it's hard to detect the idle time at device level, user send the
tune request to device when idle.

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/