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From: Amir Goldstein <amir73il@gmail.com>
To: Goldwyn Rodrigues <rgoldwyn@suse.de>
Cc: linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	Christoph Hellwig <hch@lst.de>, Steve French <smfrench@gmail.com>,
	overlayfs <linux-unionfs@vger.kernel.org>,
	Dave Chinner <david@fromorbit.com>,
	Goldwyn Rodrigues <rgoldwyn@suse.com>
Subject: Re: [PATCH 4/4] ovl: Use do_copy_file_range() in copy_up_data()
Date: Thu, 10 May 2018 07:52:59 +0300	[thread overview]
Message-ID: <CAOQ4uxgzveJKYVSKmYZAtwrb=r6dkHjxXqSyWfS64SDWgDc-EA@mail.gmail.com> (raw)
In-Reply-To: <254dfd61-8c9a-9cc9-5f95-c0227eef484c@suse.de>

On Wed, May 9, 2018 at 10:13 PM, Goldwyn Rodrigues <rgoldwyn@suse.de> wrote:
>
>
> On 05/09/2018 12:50 AM, Amir Goldstein wrote:
>> On Wed, May 9, 2018 at 12:24 AM, Goldwyn Rodrigues <rgoldwyn@suse.de> wrote:
>>> From: Goldwyn Rodrigues <rgoldwyn@suse.com>
>>>
>>> This will preserve the holes and will clone(), if available.
>>>
>>> Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
>> Reviewed-by: Amir Goldstein <amir73il@gmail.com>
>>
>> Only please mention in commit message that it changes behavoir
>> slightly for a very large file (clone in chunks).
>
> Change behavior? Only it will have holes. It will still respect length.
> Actually, I found a bug when it would not respect length if offset is
> father than length which I have fixed.

What I meant is the change of behavior for when underlying fs supports
clone.
Your patch changes the behavior for a very large file from single call
to vfs_clone_file_range() on entire length to several calls in a loop.

Nevermind. It's too insignificant for anyone to care.
If overlayfs ever supports NFS as upper layer, we may want to rethink
this.

Thanks,
Amir.

  reply	other threads:[~2018-05-10  4:53 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-08 21:24 [PATCH v1 0/5] Enable holes on copy_file_range() Goldwyn Rodrigues
2018-05-08 21:24 ` [PATCH 1/4] copy_file_range: refactor vfs_copy_file_range Goldwyn Rodrigues
2018-05-09  5:44   ` Amir Goldstein
2018-05-08 21:24 ` [PATCH 2/4] copy_file_range: Perform splice if in/out SB are not same Goldwyn Rodrigues
2018-05-08 21:57   ` Florian Weimer
2018-05-09 19:08     ` Goldwyn Rodrigues
2018-05-09  5:44   ` Amir Goldstein
2018-05-08 21:24 ` [PATCH 3/4] copy_file_range: splice with holes Goldwyn Rodrigues
2018-05-08 21:59   ` Florian Weimer
2018-05-08 23:43     ` Dave Chinner
2018-05-09  5:47   ` Amir Goldstein
2018-05-08 21:24 ` [PATCH 4/4] ovl: Use do_copy_file_range() in copy_up_data() Goldwyn Rodrigues
2018-05-09  5:50   ` Amir Goldstein
2018-05-09 19:13     ` Goldwyn Rodrigues
2018-05-10  4:52       ` Amir Goldstein [this message]
2018-05-10  1:58 [PATCH v2 0/4] Enable holes in copy_file_range() Goldwyn Rodrigues
2018-05-10  1:58 ` [PATCH 4/4] ovl: Use do_copy_file_range() in copy_up_data() Goldwyn Rodrigues
2018-05-14 14:56 [PATCH v3 0/4] Enable holes in copy_file_range() Goldwyn Rodrigues
2018-05-14 14:56 ` [PATCH 4/4] ovl: Use do_copy_file_range() in copy_up_data() Goldwyn Rodrigues
2018-06-14 15:12 [PATCH RESEND v3 0/4] Enable holes in copy_file_range() Goldwyn Rodrigues
2018-06-14 15:12 ` [PATCH 4/4] ovl: Use do_copy_file_range() in copy_up_data() Goldwyn Rodrigues

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