From: Anand Jain <anand.jain@oracle.com>
To: Goldwyn Rodrigues <rgoldwyn@suse.de>,
linux-btrfs@vger.kernel.org, Jeff Mahoney <jeffm@suse.com>,
David Sterba <dsterba@suse.com>
Subject: Re: [RFC] Converging userspace and kernel code
Date: Wed, 11 Jan 2017 10:23:34 +0800 [thread overview]
Message-ID: <2dfce804-d1ba-d9e4-e7b3-9c726ff5b49b@oracle.com> (raw)
In-Reply-To: <d0c2e05d-0b7a-a782-80b8-e1776e7b6fdb@suse.de>
On 01/11/17 00:04, Goldwyn Rodrigues wrote:
>
>
> On 01/10/2017 09:20 AM, Anand Jain wrote:
>>
>>
>> On 01/10/17 20:14, Goldwyn Rodrigues wrote:
>>>
>>>
>>> On 01/09/2017 09:28 PM, Anand Jain wrote:
>>>>
>>>> Goldwyn,
>>>>
>>>> Could you add a list what functionality in btrfs-progs will
>>>> be using the 'core'. ?
>>>
>>>
>>> There are too many to list. It would contain the algorithmic functions
>>> of btrfs which would be able to interact with both kernel and
>>> btrfs-progs.
>>
>> I am getting confused. How about a few from the btrfs-progs ?
>>
>>
>
> Functions such as open_ctree(), or the set/get functions. The idea is to
> keep the codebase of this core component the same in btrfs-progs and kernel.
The btrfs-progs open_ctree() is used for the offline functionality
such as fsck...
> As an example, see how XFS have done using libxfs. Something around the
> same lines.
>
Does XFS progs access the disks directly (without going through the
kernel) while kernel has mounted the disk ? If yes, how does it
maintain the consistency ? Calling sync for the sake of read access
by the progs, is not a good idea as it causes jitters in the steady
state IOPS for the applications. I have investigated these concerns
at the data centers earlier.
Thanks, Anand
next prev parent reply other threads:[~2017-01-11 2:20 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-08 13:16 [RFC] Converging userspace and kernel code Goldwyn Rodrigues
2017-01-09 2:11 ` Qu Wenruo
2017-01-09 9:31 ` Christoph Hellwig
2017-01-09 12:06 ` Goldwyn Rodrigues
2017-01-10 0:35 ` Qu Wenruo
2017-01-10 0:56 ` Omar Sandoval
2017-01-09 15:31 ` Eric Sandeen
2017-01-09 21:34 ` Omar Sandoval
2017-01-09 21:38 ` Jeff Mahoney
2017-01-10 1:46 ` Darrick J. Wong
2017-01-10 2:24 ` Qu Wenruo
2017-01-10 3:28 ` Anand Jain
2017-01-10 12:14 ` Goldwyn Rodrigues
2017-01-10 15:20 ` Anand Jain
2017-01-10 16:04 ` Goldwyn Rodrigues
2017-01-11 2:23 ` Anand Jain [this message]
2017-01-11 2:32 ` Qu Wenruo
2017-01-11 2:55 ` Goldwyn Rodrigues
2017-01-11 10:58 ` Anand Jain
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