From: Mike Anderson <andmike@us.ibm.com>
To: Erik Andersen <andersen@codepoet.org>
Cc: Kurt Garloff <garloff@suse.de>,
Linux SCSI list <linux-scsi@vger.kernel.org>,
USB Storage List <usb-storage@one-eyed-alien.net>
Subject: Re: [PATCH] SCSI hotplug support
Date: Mon, 14 Oct 2002 15:10:00 -0700 [thread overview]
Message-ID: <20021014220959.GA1478@beaverton.ibm.com> (raw)
In-Reply-To: <20021014204122.GB24904@codepoet.org>
Erik Andersen [andersen@codepoet.org] wrote:
> It was my understanding that the comments (which were present
> long before I changed anything) refer mainly to the fact that
> hotswapping with a normal SCSI subsystem (without additional
> electronic support for hotswapping) is electrically unsafe and is
> likely to fry up your drives and your SCSI host controller. For
> people with hotswap safe hardware (or using ieee1394 or usb mass
> storage devices), hotswapping is perfectly normal and safe, and
> the scarry comments do not apply.
I agree on the comment being more about hardware.
but..
While it may run many times the transversal of a list and references off
a element in that list concurrent with a process that might be removing
a entry from the list will eventually cause a problem. This is probably
hard to hit, but many drivers and the SCSI proc interface iterate over
the host_queue list so it is possible.
-andmike
--
Michael Anderson
andmike@us.ibm.com
next prev parent reply other threads:[~2002-10-14 22:10 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-14 5:40 [PATCH] SCSI hotplug support Erik Andersen
2002-10-14 7:06 ` Matthew Dharm
2002-10-14 7:12 ` Erik Andersen
2002-10-14 15:47 ` Kurt Garloff
2002-10-14 16:19 ` Mike Anderson
2002-10-14 20:41 ` Erik Andersen
2002-10-14 22:10 ` Mike Anderson [this message]
2002-10-14 20:46 ` Erik Andersen
2002-10-14 15:57 ` James Bottomley
2002-10-14 17:22 ` Mike Anderson
2002-10-14 17:30 ` Matthew Dharm
2002-10-14 17:39 ` James Bottomley
2002-10-14 19:11 ` Oliver Xymoron
2002-10-15 0:42 ` Kurt Garloff
2002-10-14 20:37 ` Erik Andersen
2002-10-14 21:07 ` James Bottomley
2002-10-14 21:54 ` Erik Andersen
2002-10-14 22:25 ` Doug Ledford
2002-10-15 5:25 ` Erik Andersen
2002-10-15 15:33 ` Doug Ledford
2002-10-15 18:18 ` Erik Andersen
2002-10-15 18:22 ` Doug Ledford
2002-10-15 18:45 ` Erik Andersen
2002-10-15 19:13 ` Doug Ledford
2002-10-15 19:32 ` Erik Andersen
2002-10-15 19:45 ` James Bottomley
2002-10-15 19:50 ` Scott Merritt
2002-10-15 19:55 ` Doug Ledford
2002-10-15 22:07 ` Erik Andersen
2002-10-16 2:40 ` Doug Ledford
2002-10-18 11:28 ` Erik Andersen
2002-10-15 21:43 ` Oliver Neukum
2002-10-15 22:07 ` Erik Andersen
2002-10-14 22:19 ` Oliver Neukum
2002-10-15 0:22 ` Doug Ledford
2002-10-15 7:53 ` Oliver Neukum
2002-10-15 14:35 ` Doug Ledford
2002-10-15 15:19 ` Oliver Neukum
2002-10-15 15:40 ` James Bottomley
2002-10-15 17:47 ` Erik Andersen
2002-10-15 18:34 ` Doug Ledford
2002-10-15 18:22 ` Scott Merritt
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