On 02/14/2017 08:28 AM, Ming Lei wrote: > Hi, > > This patches replaces bio_clone() with bio_fast_clone() in > bio_clone_mddev() because: > > 1) bio_clone_mddev() is used in raid normal I/O and isn't in > resync I/O path, and all the direct access to bvec table in > raid happens on resync I/O only except for write behind of raid1. > Write behind is treated specially, so the replacement is safe. > > 2) for write behind, bio_clone() is kept, but this patchset > introduces bio_clone_bioset_partial() to just clone one specific > bvecs range instead of whole table. Then write behind is improved > too. You can add my reviewed-by to the first patch. Shaohua, I'm fine with you carrying this in the md tree, that would be the easiest way forward. -- Jens Axboe
