From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Mark Mason <mason@postdiluvian.org>,
linux-ide@vger.kernel.org, jgarzik@pobox.com
Subject: Re: libata/sata_sil24 cache alignment problem?
Date: Tue, 12 Feb 2008 20:32:55 -0600 [thread overview]
Message-ID: <1202869975.3137.186.camel@localhost.localdomain> (raw)
In-Reply-To: <20080213021338.6946650e@core>
On Wed, 2008-02-13 at 02:13 +0000, Alan Cox wrote:
> > I tell you what ... find me a parisc box that actually has IDE and we
> > might have told you ...
>
> The NS87415 variant IDE has been tested on parisc and didn't blow up -
> must just be lucky.
Actually, it's only a specific class of machines: the PCX (that's most
of the 715,725 series) that are fully incoherent. PCXL hack around this
by making the page uncacheable and the 64 bit machines have coherence
index handling which fixes this up (mostly).
> > (actually, the pa8800's have IDE CD's on a cmd640 chip, but that oopses
> > on boot for no reason we've tracked yet).
>
> With libata, old IDE or both ? and what does the oops look like ?
Unfortunately, there's no oops; we get a high priority machine check
which means something has gone wrong somewhere and it's not pretty.
It's on my todo list to track down ... I just don't have one of these
boxes and CDs are hard to play with remotely.
James
next prev parent reply other threads:[~2008-02-13 2:33 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-12 18:02 libata/sata_sil24 cache alignment problem? Mark Mason
2008-02-12 22:12 ` Alan Cox
2008-02-12 23:36 ` James Bottomley
2008-02-13 2:13 ` Alan Cox
2008-02-13 2:32 ` James Bottomley [this message]
2008-02-13 18:47 ` Mark Mason
2008-02-13 20:21 ` Alan Cox
2008-02-13 21:25 ` Mark Mason
2008-02-14 0:21 ` Alan Cox
2008-02-14 3:05 ` Tejun Heo
2008-02-14 9:44 ` [PATCH] libata: align ap->sector_buf to cacheline Tejun Heo
2008-02-14 9:48 ` [PATCH] scsi: align shost->hostdata " Tejun Heo
2008-02-14 15:05 ` James Bottomley
2008-02-14 22:49 ` Tejun Heo
2008-02-15 18:57 ` James Bottomley
2008-02-21 2:32 ` Tejun Heo
2008-02-13 18:51 ` libata/sata_sil24 cache alignment problem? Mark Mason
2008-02-12 23:25 ` Thomas Evans
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