From: "Peter T. Breuer" <ptb@it.uc3m.es>
To: Thunder from the hill <thunder@lightweight.ods.org>
Cc: linux kernel <linux-kernel@vger.kernel.org>
Subject: Re: block device/VM question
Date: Tue, 27 Aug 2002 18:14:43 +0200 (MET DST) [thread overview]
Message-ID: <200208271614.g7RGEhe27614@oboe.it.uc3m.es> (raw)
In-Reply-To: <Pine.LNX.4.44.0208271006260.3234-100000@hawkeye.luckynet.adm> from Thunder from the hill at "Aug 27, 2002 10:06:50 am"
"A month of sundays ago Thunder from the hill wrote:"
> Hi,
> On Tue, 27 Aug 2002, Peter T. Breuer wrote:
> > Is there any way of turning off VMS caching for a block device?
> O_DIRECT, or easily set the buffer to zero...
Thanks!
Yes, I've noticed this in the 2.5.31 kernel. This is something
to be done on open by the overlying fs or userspace utility, or
should I set the flag on the inode->filp (or whatever) myself in
the drivers open function? And do I need to define
inode->mapping->a_ops->direct_IO()? (sorry - but I haven't had time to
experiment yet today!).
It looks like the 2.5 kernel has this pathway, but what about the 2.4
kernel? Nothing.
Peter
next prev parent reply other threads:[~2002-08-27 16:10 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-27 8:58 Peter T. Breuer
2002-08-27 16:06 ` Thunder from the hill
2002-08-27 16:14 ` Peter T. Breuer [this message]
2002-08-27 11:28 Peter T. Breuer
[not found] <Pine.LNX.4.44.0208271021020.3234-100000@hawkeye.luckynet.adm>
2002-08-27 16:32 ` Peter T. Breuer
2002-08-27 16:42 ` Thunder from the hill
2002-08-27 16:57 ` Peter T. Breuer
[not found] <Pine.LNX.4.44.0208271100460.3234-100000@hawkeye.luckynet.adm>
2002-08-27 17:12 ` Peter T. Breuer
[not found] <Pine.LNX.4.44.0208271118000.3234-100000@hawkeye.luckynet.adm>
2002-08-27 18:04 ` Peter T. Breuer
2002-08-27 19:13 ` Thunder from the hill
2002-08-27 19:28 ` Peter T. Breuer
2002-08-27 18:40 Peter T. Breuer
2002-08-28 14:38 Peter T. Breuer
2002-08-29 5:45 Peter T. Breuer
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