From: Rosen Penev <rosenp@gmail.com>
To: Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: Question about btrfs and XOR offloading
Date: Sat, 2 Jan 2021 23:12:55 -0800 [thread overview]
Message-ID: <CAKxU2N8tHnnnOO9AeTTSJdPNmZonQ+Gx90xLGRpAB7GWGQRKUg@mail.gmail.com> (raw)
In-Reply-To: <be4e5508-b8dd-148c-33d1-366b73f22d98@gmx.com>
On Sat, Jan 2, 2021 at 10:53 PM Qu Wenruo <quwenruo.btrfs@gmx.com> wrote:
>
>
>
> On 2021/1/3 上午11:50, Rosen Penev wrote:
> > I've noticed that internally, btrfs' XOR code is CPU only. Does anyone
> > know if there is a performance advantage to using a hardware
> > accelerated path? I ask as I use BTRFS on a Marvelll ARM platform with
> > XOR offload capability.
> >
> AFAIK XOR is only utilized by RAID56, while RAID56 is not considered
> safe due to write-hole, thus I don't believe whether btrfs supports
> hardware XOR would make any difference for now.
Right the question is about performance. I don't know if XOR being
async would make any difference.
>
> Thanks,
> Qu
next prev parent reply other threads:[~2021-01-03 7:14 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-03 3:50 Question about btrfs and XOR offloading Rosen Penev
2021-01-03 6:53 ` Qu Wenruo
2021-01-03 7:12 ` Rosen Penev [this message]
2021-01-04 14:44 ` David Sterba
2021-01-04 22:56 ` Rosen Penev
2021-01-05 15:33 ` David Sterba
2021-01-05 22:40 ` Rosen Penev
2021-01-06 12:37 ` David Sterba
2021-01-06 21:52 ` Rosen Penev
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