Re: [Qemu-devel] [PATCH 2/3] blockdev: n-ary bitmap merge

2018-12-11 Thread John Snow
On 12/7/18 11:25 AM, Eric Blake wrote: > On 12/6/18 1:25 PM, John Snow wrote: >> Especially outside of transactions, it is helpful to provide >> all-or-nothing semantics for bitmap merges. This facilitates >> the coalescing of multiple bitmaps into a single target for >> the "checkpoint" interpr

Re: [Qemu-devel] [PATCH 2/3] blockdev: n-ary bitmap merge

2018-12-07 Thread Eric Blake
On 12/6/18 1:25 PM, John Snow wrote: Especially outside of transactions, it is helpful to provide all-or-nothing semantics for bitmap merges. This facilitates the coalescing of multiple bitmaps into a single target for the "checkpoint" interpretation when assembling bitmaps that represent arbitra

[Qemu-devel] [PATCH 2/3] blockdev: n-ary bitmap merge

2018-12-06 Thread John Snow
Especially outside of transactions, it is helpful to provide all-or-nothing semantics for bitmap merges. This facilitates the coalescing of multiple bitmaps into a single target for the "checkpoint" interpretation when assembling bitmaps that represent arbitrary points in time from component bitmap