Re: [Qemu-devel] block migration and MAX_IN_FLIGHT_IO

2018-03-06 Thread Peter Lieven
Am 05.03.2018 um 15:52 schrieb Dr. David Alan Gilbert: > * Peter Lieven (p...@kamp.de) wrote: >> Am 05.03.2018 um 12:45 schrieb Stefan Hajnoczi: >>> On Thu, Feb 22, 2018 at 12:13:50PM +0100, Peter Lieven wrote: I stumbled across the MAX_INFLIGHT_IO field that was introduced in 2015 and

Re: [Qemu-devel] block migration and MAX_IN_FLIGHT_IO

2018-03-05 Thread Dr. David Alan Gilbert
* Peter Lieven (p...@kamp.de) wrote: > Am 05.03.2018 um 12:45 schrieb Stefan Hajnoczi: > > On Thu, Feb 22, 2018 at 12:13:50PM +0100, Peter Lieven wrote: > >> I stumbled across the MAX_INFLIGHT_IO field that was introduced in 2015 > >> and was curious what was the reason > >> to choose 512MB as

Re: [Qemu-devel] block migration and MAX_IN_FLIGHT_IO

2018-03-05 Thread Peter Lieven
Am 05.03.2018 um 12:45 schrieb Stefan Hajnoczi: > On Thu, Feb 22, 2018 at 12:13:50PM +0100, Peter Lieven wrote: >> I stumbled across the MAX_INFLIGHT_IO field that was introduced in 2015 and >> was curious what was the reason >> to choose 512MB as readahead? The question is that I found that the

Re: [Qemu-devel] block migration and MAX_IN_FLIGHT_IO

2018-03-05 Thread Stefan Hajnoczi
On Thu, Feb 22, 2018 at 12:13:50PM +0100, Peter Lieven wrote: > I stumbled across the MAX_INFLIGHT_IO field that was introduced in 2015 and > was curious what was the reason > to choose 512MB as readahead? The question is that I found that the source VM > gets very unresponsive I/O wise > while