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Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster
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From: |
Kevin Wolf |
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Subject: |
Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster |
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Date: |
Tue, 18 Aug 2020 10:18:25 +0200 |
Am 17.08.2020 um 20:18 hat Alberto Garcia geschrieben:
> On Mon 17 Aug 2020 05:53:07 PM CEST, Kevin Wolf wrote:
> > Maybe the difference is in allocating 64k at once instead of doing a
> > separate allocation for every 4k block? But with the extent size hint
> > patches to file-posix, we should allocate 1 MB at once by default now
> > (if your test image was newly created). Can you check whether this is
> > in effect for your image file?
>
> Ehmm... is that hint supported in ext4 or only in xfs?
Hm, I had understood that ext4 supports this, but looking at the kernel
code, it doesn't look like it. :-(
Kevin
- [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/14
- [PATCH 1/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/14
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Vladimir Sementsov-Ogievskiy, 2020/08/14
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Kevin Wolf, 2020/08/17
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/17
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/19
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Kevin Wolf, 2020/08/19
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/19
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/19
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Brian Foster, 2020/08/19
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/20
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Dave Chinner, 2020/08/20
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Brian Foster, 2020/08/21
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/21
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/21