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From: liubo <liubo2009@cn.fujitsu.com>
To: Hugo Mills <hugo-lkml@carfax.org.uk>, linux-btrfs@vger.kernel.org
Subject: Re: [patch 1/2] Balance progress monitoring (updated)
Date: Tue, 02 Nov 2010 08:51:25 +0800	[thread overview]
Message-ID: <4CCF608D.8030706@cn.fujitsu.com> (raw)
In-Reply-To: <20101101125510.GA4709@vlad.carfax.org.uk>

On 11/01/2010 08:55 PM, Hugo Mills wrote:
> On Mon, Nov 01, 2010 at 04:06:53PM +0800, liubo wrote:
>> On 10/30/2010 09:39 PM, Hugo Mills wrote:
>>> This patch introduces a basic form of progress monitoring for balance
>>> operations, by counting the number of block groups remaining. The
>>> information is exposed to userspace by an ioctl.
>>>
>> IMO, tracking the information of blocks which are balancing also makes sense. 
>> For example, the block information's blocknr. 
>> It can help us monitor better.
> 
>    I don't see how that will help. The block group IDs (which is all
> that we get at this level) are effectively arbitrary 64-bit numbers,
> and are what appear in the kernel logs. How could that information be
> used to improve monitoring?

64-bit numbers are also shown in btrfs-debug-tree.
With btrfs-debug-tree, it would be helpful to track balanced extent buffers.

thanks,
liubo

> 
>    I'm not ruling out the idea completely -- I just can't see at the
> moment how it would be used.
> 
>    Hugo.
> 


  reply	other threads:[~2010-11-02  0:51 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-30  0:07 [patch 0/2] Control filesystem balances (kernel side) Hugo Mills
2010-10-30  0:07 ` [patch 1/2] Balance progress monitoring Hugo Mills
2010-10-30 13:37   ` Hugo Mills
2010-10-30 13:39   ` [patch 1/2] Balance progress monitoring (updated) Hugo Mills
2010-11-01  8:06     ` liubo
2010-11-01 12:55       ` Hugo Mills
2010-11-02  0:51         ` liubo [this message]
2010-10-30  0:07 ` [patch 2/2] Cancel filesystem balance Hugo Mills
2010-10-30 17:44 ` [patch 0/2] Control filesystem balances (kernel side) Goffredo Baroncelli
2010-11-01 12:58   ` Xavier Nicollet
2010-11-01 12:52     ` Tomasz Torcz
2010-11-01 13:05   ` Hugo Mills
2010-11-04 22:55   ` RFC: exporting info via sysfs [was Re: [patch 0/2] Control filesystem balances (kernel side)] Goffredo Baroncelli
2010-11-05 12:41     ` Hugo Mills

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