From: Jeff Garzik <jeff@garzik.org>
To: Matthew Wilcox <matthew@wil.cx>
Cc: linux-scsi@vger.kernel.org
Subject: Re: [RFC] libata support for async scanning
Date: Sat, 13 May 2006 01:16:46 -0400 [thread overview]
Message-ID: <44656BBE.7020806@garzik.org> (raw)
In-Reply-To: <20060513050529.GS12272@parisc-linux.org>
Matthew Wilcox wrote:
> I don't think SATA target scanning occupies a huge amount of boot time,
> however it will currently force all async scanners to complete before it
> scans. The Rolls-Royce solution would be somethinkg akin to the new
> scsi_scan_host(), but I don't think that's necessaary. This patch just
> acknowledges that async scanning exists and will permit the drive
> additions to finish some time after libata has triggered the probe.
This seems to add needless complexity.
The internal probe is complete before the loop begins. Thus,
ata_scan_scan_host() is simply walking data structures in memory (due to
SCSI simulator) for ATA devices, and for ATAPI devices parallelism is
largely inadvisable :) Its overkill, and in some rare cases could make
debugging more annoying.
Jeff
next prev parent reply other threads:[~2006-05-13 5:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-13 5:05 [RFC] libata support for async scanning Matthew Wilcox
2006-05-13 5:16 ` Jeff Garzik [this message]
2006-05-13 13:16 ` Matthew Wilcox
2006-05-14 1:26 ` Jeff Garzik
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