linux-kernel - Re: [PATCH -mm 2/8] AHCI: Speed-up resume

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:	Thu, 10 Jul 2008 13:34:20 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Tejun Heo <tj@...nel.org>, Zhang Rui <rui.zhang@...el.com>,
	Jeff Garzik <jeff@...zik.org>
Subject: Re: [PATCH -mm 2/8] AHCI: Speed-up resume

On Thu 2008-07-10 01:58:48, Rafael J. Wysocki wrote:
> From: Zhang Rui <rui.zhang@...el.com>
> Subject: AHCI: Speed-up resume
> 
> During resume, sleep 1 second to wait for the HBA reset
> to finish is a waste of time.
> 
> According to the AHCI 1.2 spec,
> We should poll the HOST_CTL register,
> and return error if the host reset is not
> finished within 1 second.
> 
> Test results show that the HBA reset can be done quickly(in usecs).
> And this patch may save nearly 1 second during resume.
> 
> Signed-off-by: Zhang Rui <rui.zhang@...el.com>
> Acked-by: Tejun Heo <tj@...nel.org>
> Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>

ACK.

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
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/