Re: [PATCH kernel 0/2] speed up live migration by skipping free pages

2016-04-25 Thread Dr. David Alan Gilbert
* Michael S. Tsirkin (m...@redhat.com) wrote: > On Mon, Apr 25, 2016 at 05:38:30PM +0530, Amit Shah wrote: > > On (Mon) 25 Apr 2016 [14:04:06], Michael S. Tsirkin wrote: > > > On Mon, Apr 25, 2016 at 11:36:41AM +0530, Amit Shah wrote: > > > > On (Tue) 19 Apr 2016 [22:34:32], Liang Li wrote: > > > >

Re: [PATCH kernel 0/2] speed up live migration by skipping free pages

2016-04-25 Thread Michael S. Tsirkin
On Mon, Apr 25, 2016 at 05:38:30PM +0530, Amit Shah wrote: > On (Mon) 25 Apr 2016 [14:04:06], Michael S. Tsirkin wrote: > > On Mon, Apr 25, 2016 at 11:36:41AM +0530, Amit Shah wrote: > > > On (Tue) 19 Apr 2016 [22:34:32], Liang Li wrote: > > > > Current QEMU live migration implementation mark all g

Re: [PATCH kernel 0/2] speed up live migration by skipping free pages

2016-04-25 Thread Amit Shah
On (Mon) 25 Apr 2016 [14:04:06], Michael S. Tsirkin wrote: > On Mon, Apr 25, 2016 at 11:36:41AM +0530, Amit Shah wrote: > > On (Tue) 19 Apr 2016 [22:34:32], Liang Li wrote: > > > Current QEMU live migration implementation mark all guest's RAM pages > > > as dirtied in the ram bulk stage, all these

Re: [PATCH kernel 0/2] speed up live migration by skipping free pages

2016-04-25 Thread Michael S. Tsirkin
On Mon, Apr 25, 2016 at 11:36:41AM +0530, Amit Shah wrote: > On (Tue) 19 Apr 2016 [22:34:32], Liang Li wrote: > > Current QEMU live migration implementation mark all guest's RAM pages > > as dirtied in the ram bulk stage, all these pages will be processed > > and it consumes quite a lot of CPU cycl

Re: [PATCH kernel 0/2] speed up live migration by skipping free pages

2016-04-24 Thread Amit Shah
On (Tue) 19 Apr 2016 [22:34:32], Liang Li wrote: > Current QEMU live migration implementation mark all guest's RAM pages > as dirtied in the ram bulk stage, all these pages will be processed > and it consumes quite a lot of CPU cycles and network bandwidth. > > From guest's point of view, it doesn

[PATCH kernel 0/2] speed up live migration by skipping free pages

2016-04-19 Thread Liang Li
Current QEMU live migration implementation mark all guest's RAM pages as dirtied in the ram bulk stage, all these pages will be processed and it consumes quite a lot of CPU cycles and network bandwidth. >From guest's point of view, it doesn't care about the content in free page. We can make use of