From: Thanos Kyritsis <djart@linux.gr>
To: Mark Lord <liml@rtr.ca>
Cc: linux-ide@vger.kernel.org,
Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: Re: [PROBLEM]: hdparm strange behaviour for 2.6.21 and later
Date: Wed, 20 Jun 2007 18:07:41 +0300 [thread overview]
Message-ID: <200706201807.41646.djart@linux.gr> (raw)
In-Reply-To: <4676E47E.5050209@rtr.ca>
On Monday 18 June 2007, Mark Lord wrote:
> Thanos Kyritsis wrote:
[snip]
> > /etc/rc.d/rc.local contains the following:
> > /usr/sbin/hdparm -q -d1 -q -u1 -q -c1 -q -k1 /dev/hda
> > /usr/sbin/hdparm -q -d1 -q -u1 -q -c1 -q -k1 /dev/hdb
[snip]
> Sounds like a (kernel) timing issue.
> The "-q" option gets rid of some intermediary printf's,
> and nothing else. So with -q, the ioctl() calls happen
> much closer together in time. Without -q, the intermediary
> printf's likely cause a resched, giving the kernel more time
> to complete anything left over from the earlier call.
>
> ????
>
> Any difference with a modern version of hdparm?
The same issue happens when using hdparm 7.4 as well as 7.5.
> -ml
--
Thanos Kyritsis <djart at linux.gr>
- What's your ONE purpose in life ?
- To explode, of course! ;-)
next prev parent reply other threads:[~2007-06-20 15:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-16 16:58 [PROBLEM]: hdparm strange behaviour for 2.6.21 and later Thanos Kyritsis
2007-06-18 20:01 ` Mark Lord
2007-06-20 15:07 ` Thanos Kyritsis [this message]
2007-06-23 18:28 ` Bartlomiej Zolnierkiewicz
2007-06-24 17:47 ` Thanos Kyritsis
2007-06-27 19:46 ` PREEMPT bug? (was: Re: [PROBLEM]: hdparm strange behaviour for 2.6.21 and later) Bartlomiej Zolnierkiewicz
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