Re: [Qemu-devel] [PATCH 1/3] ppc: fix timebase adjustment during migration

2016-01-31 Thread David Gibson
On Sun, Jan 31, 2016 at 07:19:34PM +, Mark Cave-Ayland wrote: > ns_diff is already clamped to a minimum of 0 to prevent the timebase going > backwards during migration due to misaligned clocks. Following on from this > migration_duration_tb is also subject to the same constraint; hence the > ex

[Qemu-devel] [PATCH 1/3] ppc: fix timebase adjustment during migration

2016-01-31 Thread Mark Cave-Ayland
ns_diff is already clamped to a minimum of 0 to prevent the timebase going backwards during migration due to misaligned clocks. Following on from this migration_duration_tb is also subject to the same constraint; hence the expression MIN(0, migration_duration_tb) always evaluates to 0 and so no tim