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From: "Wang, Zhiye" <Zhiye.Wang@Arcserve.com>
To: "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: RE: freeze_bdev and scrub/re-balance
Date: Wed, 9 Dec 2015 11:01:35 +0000	[thread overview]
Message-ID: <CY1PR10MB04287C587E5F87A56289F282E4E80@CY1PR10MB0428.namprd10.prod.outlook.com> (raw)
In-Reply-To: <CY1PR10MB0428E36B7C37C92740306A60E40B0@CY1PR10MB0428.namprd10.prod.outlook.com>

Can anyone help me with this question?

Not only the kernel space API freeze_bdev, but also the IO control which can be called from user space.



-----Original Message-----
From: Wang, Zhiye 
Sent: Saturday, December 5, 2015 5:57 PM
To: linux-btrfs@vger.kernel.org
Subject: freeze_bdev and scrub/re-balance

Hi all,


If I understand it correctly, defragment operation is done in user space tools, while scrub/re-balance is done in kernel thread.


So, if my kernel module calls freeze_bdev when scrub/re-balance is in progress, will I still be able to get a consistent file system state?




Thanks
Mike


     

  reply	other threads:[~2015-12-09 11:01 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CY1PR10MB0428B98E759584F476DB4CF3E40B0@CY1PR10MB0428.namprd10.prod.outlook.com>
2015-12-05  9:57 ` freeze_bdev and scrub/re-balance Wang, Zhiye
2015-12-09 11:01   ` Wang, Zhiye [this message]
2015-12-09 17:21   ` Liu Bo
2015-12-14  9:27     ` Wang, Zhiye
2016-01-07 22:14       ` Liu Bo
2016-01-08  3:13         ` Wang, Zhiye

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