[PATCH v3 0/4] block: seriously improve savevm performance

2020-06-11 Thread Denis V. Lunev
This series do standard basic things: - it creates intermediate buffer for all writes from QEMU migration code to QCOW2 image, - this buffer is sent to disk asynchronously, allowing several writes to run in parallel. In general, migration code is fantastically inefficent (by observation), buff

Re: [PATCH v3 0/4] block: seriously improve savevm performance

2020-06-15 Thread Dr. David Alan Gilbert
* Denis V. Lunev (d...@openvz.org) wrote: > This series do standard basic things: > - it creates intermediate buffer for all writes from QEMU migration code > to QCOW2 image, > - this buffer is sent to disk asynchronously, allowing several writes to > run in parallel. > > In general, migration

Re: [PATCH v3 0/4] block: seriously improve savevm performance

2020-06-15 Thread Denis V. Lunev
On 6/15/20 3:17 PM, Dr. David Alan Gilbert wrote: > * Denis V. Lunev (d...@openvz.org) wrote: >> This series do standard basic things: >> - it creates intermediate buffer for all writes from QEMU migration code >> to QCOW2 image, >> - this buffer is sent to disk asynchronously, allowing several w

Re: [PATCH v3 0/4] block: seriously improve savevm performance

2020-06-15 Thread Dr. David Alan Gilbert
* Denis V. Lunev (d...@openvz.org) wrote: > On 6/15/20 3:17 PM, Dr. David Alan Gilbert wrote: > > * Denis V. Lunev (d...@openvz.org) wrote: > >> This series do standard basic things: > >> - it creates intermediate buffer for all writes from QEMU migration code > >> to QCOW2 image, > >> - this buf