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From: Malahal Naineni <malahal@us.ibm.com>
To: dm-devel@redhat.com
Cc: "Riches Jr, RobertX M" <robertx.m.riches.jr@intel.com>
Subject: Re: Is there a way to see updated contents of a	DM target's underlying device while the DM target is in use?
Date: Wed, 30 Jun 2010 18:03:09 -0700	[thread overview]
Message-ID: <20100701010309.GC24284@us.ibm.com> (raw)
In-Reply-To: <20100701005156.GY23989@agk-dp.fab.redhat.com>

Alasdair G Kergon [agk@redhat.com] wrote:
> On Wed, Jun 30, 2010 at 04:53:23PM -0700, Riches Jr, RobertX M wrote:
> > I didn't see any queues or caches in dm-linear that would need to be flushed.
> 
> It's your test script that is not behaving as you expect:)
> 
> Add conv=odirect to dd

You mean flags rather than conv? conv just converts ascii to ebcdic etc. 
oflag=direct would do direct I/O on the writes and iflag=direct should do
direct I/O on reads.

Thanks, Malahal.

  parent reply	other threads:[~2010-07-01  1:03 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-06-30 22:54 Is there a way to see updated contents of a DM target's underlying device while the DM target is in use? Riches Jr, RobertX M
2010-06-30 23:08 ` Alasdair G Kergon
2010-06-30 23:53   ` Riches Jr, RobertX M
2010-07-01  0:51     ` Alasdair G Kergon
2010-07-01  1:01       ` Alasdair G Kergon
2010-07-01  1:03       ` Malahal Naineni [this message]
2010-07-01  1:49         ` Alasdair G Kergon
2010-07-01 16:46       ` Riches Jr, RobertX M
2010-07-01 19:00         ` Malahal Naineni
2010-07-02 14:52           ` Hannes Reinecke
2010-07-01  0:54     ` Malahal Naineni
2010-07-01  0:22 ` Neil Brown
2010-07-01  0:58   ` Malahal Naineni

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