Re: [PATCH 1/7] ubi: block: Refactor sg list processing for highmem

[Richard Weinberger]

----- Ursprüngliche Mail -----
> Von: "Christoph Hellwig" <hch@xxxxxxxxxxxxx>
> On Thu, Aug 10, 2023 at 09:54:46PM +0200, Richard Weinberger wrote:
>> > But why add the bounce buffering first if you can avoid it from the
>> > very beginning by just using kmap_local instead of adding a new
>> > caller for the deprecate kmap_atomic?
>> 
>> Because I want this fix also in all stable trees. kmap_local() is rather
>> new. When back porting patch 1/7, bounce buffers and kmap_atomic()
>> are needed anyway.
>> By doing this in patch 1/7 I avoid backport troubles and keep the
>> delta between upstream and stable trees minimal.
> 
> Just use plain kmap for the historic backports.

Hm, yes. For UBIblock kmap should be too expensive.

Thanks,
//richard