From: Tejun Heo <htejun@gmail.com>
To: ric@emc.com
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
linux-ide@vger.kernel.org, Jeff Garzik <jgarzik@pobox.com>,
Mark Lord <mlord@pobox.com>
Subject: Re: error handling - DMA to PIO step down sequence
Date: Fri, 22 Sep 2006 01:58:53 +0900 [thread overview]
Message-ID: <4512C4CD.80000@gmail.com> (raw)
In-Reply-To: <4512C2C0.9010503@emc.com>
Ric Wheeler wrote:
> Alan Cox wrote:
>> Ar Iau, 2006-09-21 am 12:26 -0400, ysgrifennodd Ric Wheeler:
>>
>>>>> Would this be a reasonable thing for a config option? Better to add
>>>>> yet another blacklist for devices that might have a justified need
>>>>> for this derating?
>>
>> I think so. I've got "Adding a set of flags to blacklist entries" on my
>> todo list so that we can indicate and deal with different kinds of
>> horkage.
>
> That could be very useful - flag specific drives to disable NCQ
> (regardless of the internal setting for drive queue depth) and so on.
Yeap, in general, we need a blacklist. For example, some drives only do
NCQ w/ only 16 or so commands or others have completely broken NCQ
support. But I don't think the broken read log page 10h needs a
blacklist entry. It can be easily handled by good default behavior.
--
tejun
prev parent reply other threads:[~2006-09-21 16:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-20 19:03 error handling - DMA to PIO step down sequence Ric Wheeler
2006-09-21 15:09 ` Tejun Heo
2006-09-21 16:26 ` Ric Wheeler
2006-09-21 17:04 ` Alan Cox
2006-09-21 16:50 ` Ric Wheeler
2006-09-21 16:58 ` Tejun Heo [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4512C4CD.80000@gmail.com \
--to=htejun@gmail.com \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=jgarzik@pobox.com \
--cc=linux-ide@vger.kernel.org \
--cc=mlord@pobox.com \
--cc=ric@emc.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).