From: Mark Lord <mlord@pobox.com>
To: Doug Maxey <dwm@maxeymade.com>
Cc: Linux IDE Mailing List <linux-ide@vger.kernel.org>
Subject: Re: hdparm write cache settings
Date: Tue, 19 Oct 2004 17:47:31 -0400 [thread overview]
Message-ID: <41758B73.60506@pobox.com> (raw)
In-Reply-To: <200410151948.i9FJmKMR019895@falcon30.maxeymade.com>
Hi,
Sure, I can update hdparm to first attempt HDIO_SET_WCACHE.
If that call is nak'd (usually due to lack of kernel support for it),
then hdparm will use HDIO_DRIVE_CMD as a fallback.
This is a VERY popular setting among end-users of Linux.
Cheers
--
Mark Lord
Real-Time Remedies Inc.
mlord@pobox.com
Doug Maxey wrote:
> Mark,
>
> I have been tweaking the idedisk_setup() and write_cache() to handle
> drives with write cache disabled by default and the barrier settings on
> changes between WC enabled and disabled.
>
> Bart has pointed out in offline mail, and testing has confirmed, that
> HDIO_DRIVE_CMD is used, which bypasses the settings parameter lookup
> in generic_ide_ioctl() of the drive settings enabled in ide_add_settings().
>
> Is it reasonable that a change could be made to enable the use of
> HDIO_SET_WCACHE in hdparm?
>
> Or should I be looking to intercept the call and do The Right Thing
> (TM:) in the ide driver?
>
>
> ++doug
>
>
>
>
>
next prev parent reply other threads:[~2004-10-19 21:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-15 19:48 hdparm write cache settings Doug Maxey
2004-10-19 21:47 ` Mark Lord [this message]
2004-10-21 16:54 ` Doug Maxey
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