Re: [Qemu-devel] [PATCH v5 2/5] qcow2: Document some maximum size constraints

2018-04-24 Thread Alberto Garcia
On Tue 24 Apr 2018 12:33:34 AM CEST, Eric Blake wrote: > Although off_t permits up to 63 bits (8EB) of file offsets, in > practice, we're going to hit other limits first. Document some > of those limits in the qcow2 spec, and how choice of cluster size > can influence some of the limits. > >

[Qemu-devel] [PATCH v5 2/5] qcow2: Document some maximum size constraints

2018-04-23 Thread Eric Blake
Although off_t permits up to 63 bits (8EB) of file offsets, in practice, we're going to hit other limits first. Document some of those limits in the qcow2 spec, and how choice of cluster size can influence some of the limits. While at it, notice that since we cannot map any virtual cluster to