Re: [Qemu-devel] [PATCH V5] qemu-img: align result of is_allocated_sectors

2018-07-12 Thread Kevin Wolf
Am 12.07.2018 um 11:26 hat Peter Lieven geschrieben: > Am 11.07.2018 um 10:25 schrieb Kevin Wolf: > > Am 10.07.2018 um 22:16 hat Peter Lieven geschrieben: > > > > > > > Am 10.07.2018 um 17:31 schrieb Kevin Wolf : > > > > > > > > Am 10.07.2018 um 17:05 hat Peter Lieven geschrieben: > > > > > We cu

Re: [Qemu-devel] [PATCH V5] qemu-img: align result of is_allocated_sectors

2018-07-12 Thread Peter Lieven
Am 11.07.2018 um 10:25 schrieb Kevin Wolf: Am 10.07.2018 um 22:16 hat Peter Lieven geschrieben: Am 10.07.2018 um 17:31 schrieb Kevin Wolf : Am 10.07.2018 um 17:05 hat Peter Lieven geschrieben: We currently don't enforce that the sparse segments we detect during convert are aligned. This lead

Re: [Qemu-devel] [PATCH V5] qemu-img: align result of is_allocated_sectors

2018-07-12 Thread Peter Lieven
Am 11.07.2018 um 10:25 schrieb Kevin Wolf: Am 10.07.2018 um 22:16 hat Peter Lieven geschrieben: Am 10.07.2018 um 17:31 schrieb Kevin Wolf : Am 10.07.2018 um 17:05 hat Peter Lieven geschrieben: We currently don't enforce that the sparse segments we detect during convert are aligned. This lead

Re: [Qemu-devel] [PATCH V5] qemu-img: align result of is_allocated_sectors

2018-07-11 Thread Kevin Wolf
Am 10.07.2018 um 22:16 hat Peter Lieven geschrieben: > > > > Am 10.07.2018 um 17:31 schrieb Kevin Wolf : > > > > Am 10.07.2018 um 17:05 hat Peter Lieven geschrieben: > >> We currently don't enforce that the sparse segments we detect during > >> convert are > >> aligned. This leads to unnecessar

Re: [Qemu-devel] [PATCH V5] qemu-img: align result of is_allocated_sectors

2018-07-10 Thread Peter Lieven
> Am 10.07.2018 um 17:31 schrieb Kevin Wolf : > > Am 10.07.2018 um 17:05 hat Peter Lieven geschrieben: >> We currently don't enforce that the sparse segments we detect during convert >> are >> aligned. This leads to unnecessary and costly read-modify-write cycles either >> internally in Qemu o

Re: [Qemu-devel] [PATCH V5] qemu-img: align result of is_allocated_sectors

2018-07-10 Thread Kevin Wolf
Am 10.07.2018 um 17:05 hat Peter Lieven geschrieben: > We currently don't enforce that the sparse segments we detect during convert > are > aligned. This leads to unnecessary and costly read-modify-write cycles either > internally in Qemu or in the background on the storage device as nearly all >

[Qemu-devel] [PATCH V5] qemu-img: align result of is_allocated_sectors

2018-07-10 Thread Peter Lieven
We currently don't enforce that the sparse segments we detect during convert are aligned. This leads to unnecessary and costly read-modify-write cycles either internally in Qemu or in the background on the storage device as nearly all modern filesystems or hardware have a 4k alignment internally.