Re: [Qemu-devel] [PATCHv3] block: optimize zero writes with bdrv_write_zeroes

2014-05-08 Thread Kevin Wolf
Am 07.05.2014 um 18:02 hat Peter Lieven geschrieben: > On 07.05.2014 17:45, Peter Lieven wrote: > >On 07.05.2014 17:38, Kevin Wolf wrote: > >>Am 07.05.2014 um 17:26 hat Peter Lieven geschrieben: > >>>On 07.05.2014 17:19, Kevin Wolf wrote: > Am 07.05.2014 um 16:26 hat Peter Lieven geschrieben: >

Re: [Qemu-devel] [PATCHv3] block: optimize zero writes with bdrv_write_zeroes

2014-05-07 Thread Peter Lieven
On 07.05.2014 17:38, Kevin Wolf wrote: Am 07.05.2014 um 17:26 hat Peter Lieven geschrieben: On 07.05.2014 17:19, Kevin Wolf wrote: Am 07.05.2014 um 16:26 hat Peter Lieven geschrieben: On 07.05.2014 04:52, Eric Blake wrote: On 05/06/2014 06:23 PM, Peter Lieven wrote: this patch tries to optim

Re: [Qemu-devel] [PATCHv3] block: optimize zero writes with bdrv_write_zeroes

2014-05-07 Thread Peter Lieven
On 07.05.2014 17:45, Peter Lieven wrote: On 07.05.2014 17:38, Kevin Wolf wrote: Am 07.05.2014 um 17:26 hat Peter Lieven geschrieben: On 07.05.2014 17:19, Kevin Wolf wrote: Am 07.05.2014 um 16:26 hat Peter Lieven geschrieben: On 07.05.2014 04:52, Eric Blake wrote: On 05/06/2014 06:23 PM, Pete

Re: [Qemu-devel] [PATCHv3] block: optimize zero writes with bdrv_write_zeroes

2014-05-07 Thread Peter Lieven
On 07.05.2014 17:38, Kevin Wolf wrote: Am 07.05.2014 um 17:26 hat Peter Lieven geschrieben: On 07.05.2014 17:19, Kevin Wolf wrote: Am 07.05.2014 um 16:26 hat Peter Lieven geschrieben: On 07.05.2014 04:52, Eric Blake wrote: On 05/06/2014 06:23 PM, Peter Lieven wrote: this patch tries to optim

Re: [Qemu-devel] [PATCHv3] block: optimize zero writes with bdrv_write_zeroes

2014-05-07 Thread Kevin Wolf
Am 07.05.2014 um 17:26 hat Peter Lieven geschrieben: > On 07.05.2014 17:19, Kevin Wolf wrote: > >Am 07.05.2014 um 16:26 hat Peter Lieven geschrieben: > >>On 07.05.2014 04:52, Eric Blake wrote: > >>>On 05/06/2014 06:23 PM, Peter Lieven wrote: > this patch tries to optimize zero write requests >

Re: [Qemu-devel] [PATCHv3] block: optimize zero writes with bdrv_write_zeroes

2014-05-07 Thread Peter Lieven
On 07.05.2014 17:19, Kevin Wolf wrote: Am 07.05.2014 um 16:26 hat Peter Lieven geschrieben: On 07.05.2014 04:52, Eric Blake wrote: On 05/06/2014 06:23 PM, Peter Lieven wrote: this patch tries to optimize zero write requests by automatically using bdrv_write_zeroes if it is supported by the for

Re: [Qemu-devel] [PATCHv3] block: optimize zero writes with bdrv_write_zeroes

2014-05-07 Thread Kevin Wolf
Am 07.05.2014 um 16:26 hat Peter Lieven geschrieben: > On 07.05.2014 04:52, Eric Blake wrote: > >On 05/06/2014 06:23 PM, Peter Lieven wrote: > >>this patch tries to optimize zero write requests > >>by automatically using bdrv_write_zeroes if it is > >>supported by the format. > >> > >>This signific

Re: [Qemu-devel] [PATCHv3] block: optimize zero writes with bdrv_write_zeroes

2014-05-07 Thread Peter Lieven
On 07.05.2014 04:52, Eric Blake wrote: On 05/06/2014 06:23 PM, Peter Lieven wrote: this patch tries to optimize zero write requests by automatically using bdrv_write_zeroes if it is supported by the format. This significantly speeds up file system initialization and should speed zero write test

Re: [Qemu-devel] [PATCHv3] block: optimize zero writes with bdrv_write_zeroes

2014-05-06 Thread Eric Blake
On 05/06/2014 06:23 PM, Peter Lieven wrote: > this patch tries to optimize zero write requests > by automatically using bdrv_write_zeroes if it is > supported by the format. > > This significantly speeds up file system initialization and > should speed zero write test used to test backend storage

[Qemu-devel] [PATCHv3] block: optimize zero writes with bdrv_write_zeroes

2014-05-06 Thread Peter Lieven
this patch tries to optimize zero write requests by automatically using bdrv_write_zeroes if it is supported by the format. This significantly speeds up file system initialization and should speed zero write test used to test backend storage performance. I ran the following 2 tests on my internal

Re: [Qemu-devel] [PATCHv3] block: optimize zero writes with bdrv_write_zeroes

2014-05-06 Thread Peter Lieven
please ignore this one, I accidently used an old commit message Am 07.05.2014 02:01, schrieb Peter Lieven: > this patch tries to optimize zero write requests > by automatically using bdrv_write_zeroes if it is > supported by the format. > > this should significantly speed up file system initializa

[Qemu-devel] [PATCHv3] block: optimize zero writes with bdrv_write_zeroes

2014-05-06 Thread Peter Lieven
this patch tries to optimize zero write requests by automatically using bdrv_write_zeroes if it is supported by the format. this should significantly speed up file system initialization and should speed zero write test used to test backend storage performance. the difference can simply be tested