From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Andreas Mohr <andi@rhlx01.fht-esslingen.de>
Cc: Andrew Morton <akpm@osdl.org>,
B.Zolnierkiewicz@elka.pw.edu.pl, linux-ide@vger.kernel.org,
kernel list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -mm] ide_end_drive_cmd(): avoid instruction pipeline stall
Date: Fri, 30 Jun 2006 18:26:56 +0100 [thread overview]
Message-ID: <1151688416.31392.66.camel@localhost.localdomain> (raw)
In-Reply-To: <20060630161351.GA17434@rhlx01.fht-esslingen.de>
Ar Gwe, 2006-06-30 am 18:13 +0200, ysgrifennodd Andreas Mohr:
> Use an independently-formatted "unsigned int" for data instead of a
> restrictive "u16" to avoid instruction fetch pipeline stalls
> probably caused by the byte calculations later.
drivers/ide is on its way out. I'm also curious that this shows up given
that the inw() is going to cause a PCI sequence and stall the CPU
entirely for ages anyway.
NAK because
1. This is a gcc problem
2. Not everyone is using an intel x86-32 box which has such problems
3. IDE is in life-support mode and the relatives are already planning
the flowers.
Alan
next prev parent reply other threads:[~2006-06-30 17:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-30 16:13 [PATCH -mm] ide_end_drive_cmd(): avoid instruction pipeline stall Andreas Mohr
2006-06-30 17:26 ` Alan Cox [this message]
2006-06-30 18:00 ` Andrew Morton
2006-06-30 18:21 ` Alan Cox
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