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Re: [dm-devel] Re: [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md.

From: Alasdair G Kergon <agk redhat com>
To: device-mapper development <dm-devel redhat com>
Cc: Tejun Heo <htejun gmail com>, David Chinner <dgc sgi com>, linux-kernel vger kernel org, linux-raid vger kernel org, Jens Axboe <jens axboe oracle com>, linux-fsdevel vger kernel org, Andreas Dilger <adilger clusterfs com>
Subject: Re: [dm-devel] Re: [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md.
Date: Thu, 31 May 2007 02:07:39 +0100

On Thu, May 31, 2007 at 10:46:04AM +1000, Neil Brown wrote:
> If a filesystem cares, it could 'ask' as suggested above.
> What would be a good interface for asking?

XFS already tests:
  bd_disk->queue->ordered == QUEUE_ORDERED_NONE

Alasdair
-- 
agk redhat com

Follow-Ups:
- Re: [dm-devel] Re: [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md.
  - From: David Chinner

References:
- [dm-devel] [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md.
  - From: Neil Brown
- [dm-devel] Re: [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md.
  - From: Neil Brown
- [dm-devel] Re: [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md.
  - From: David Chinner
- [dm-devel] Re: [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md.
  - From: Neil Brown
- [dm-devel] Re: [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md.
  - From: David Chinner
- [dm-devel] Re: [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md.
  - From: Neil Brown

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