Re: [Qemu-devel] [PATCHv2] block: optimize zero writes with bdrv_write_zeroes

2014-04-01 Thread Peter Lieven
Am 28.03.2014 16:53, schrieb Eric Blake: > On 03/28/2014 08:46 AM, 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 spe

Re: [Qemu-devel] [PATCHv2] block: optimize zero writes with bdrv_write_zeroes

2014-04-01 Thread Fam Zheng
On Fri, 03/28 15:46, 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 > p

Re: [Qemu-devel] [PATCHv2] block: optimize zero writes with bdrv_write_zeroes

2014-03-28 Thread Eric Blake
On 03/28/2014 08:46 AM, 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] [PATCHv2] block: optimize zero writes with bdrv_write_zeroes

2014-03-28 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