linux-kernel - Re: [PATCH 2/4] fastboot: make scsi probes asynchronous

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Message-ID: <20090104104425.4bee0c95@infradead.org>
Date:	Sun, 4 Jan 2009 10:44:25 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	"Jaswinder Singh Rajput" <jaswinderlinux@...il.com>
Cc:	"Matthew Wilcox" <matthew@....cx>, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, mingo@...e.hu, fweisbec@...il.com,
	linux-scsi@...r.kernel.org, linux-ide@...r.kernel.org,
	linux-acpi@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: [PATCH 2/4] fastboot: make scsi probes asynchronous

On Mon, 5 Jan 2009 00:08:42 +0530
"Jaswinder Singh Rajput" <jaswinderlinux@...il.com> wrote:

> On Sun, Jan 4, 2009 at 11:43 PM, Arjan van de Ven
> <arjan@...radead.org> wrote:
> >
> > just checked;
> > my box has CONFIG_SCSI_SCAN_ASYNC=y set for both cases
> > it seems to be about 0.1 seconds win still though...
> > sounds little, but a kernel boot should be less than a second, so
> > that is still 10%. And it's obviously also disk dependent..
> > (I used libata connected disks obviously)
> >
> 
> Do you also have boot time numbers for RAM and/or flash based
> filesystem (disk-less)

my laptop with a pretty nice SSD shows a similar kind of behavior
(bit shorter in time, but there the entire kernel boot is shorter as a
whole)



-- 
Arjan van de Ven 	Intel Open Source Technology Centre
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