Re: [Qemu-block] [PATCH v2 16/17] block: Split bdrv_merge_limits() from bdrv_refresh_limits()

[Fam Zheng]

On Tue, 06/14 15:30, Eric Blake wrote:
> The raw block driver was blindly copying all limits from bs->file,
> even though: 1. the main bdrv_refresh_limits() already does this
> for many of gthe limits, and 2. blindly copying from the children

s/gthe/the ?

> can weaken any stricter limits that were already inherited from
> the backing dhain during the main bdrv_refresh_limits().  Also,
> the next patch is about to move .request_alignment into
> BlockLimits, and that is a limit that should NOT be copied from
> other layers in the BDS chain.
> 
> Solve the issue by factoring out a new bdrv_merge_limits(),
> and using that function to properly merge limits when comparing
> two BlockDriverState objects.
> 
> Signed-off-by: Eric Blake <address@hidden>

Reviewed-by: Fam Zheng <address@hidden>