Re: [PATCH 5/6] treewide: use kv[mz]alloc* rather than opencoded variants

[David Sterba]

On Thu, Jan 12, 2017 at 04:37:16PM +0100, Michal Hocko wrote:
> From: Michal Hocko <mhocko@xxxxxxxx>
> 
> There are many code paths opencoding kvmalloc. Let's use the helper
> instead. The main difference to kvmalloc is that those users are usually
> not considering all the aspects of the memory allocator. E.g. allocation
> requests < 64kB are basically never failing and invoke OOM killer to
> satisfy the allocation. This sounds too disruptive for something that
> has a reasonable fallback - the vmalloc. On the other hand those
> requests might fallback to vmalloc even when the memory allocator would
> succeed after several more reclaim/compaction attempts previously. There
> is no guarantee something like that happens though.
> 
> This patch converts many of those places to kv[mz]alloc* helpers because
> they are more conservative.

For the btrfs bits,

Acked-by: David Sterba <dsterba@xxxxxxxx>