On Wed, Nov 21, 2018 at 11:37:27PM +0800, Ming Lei wrote: > > + bio = bio_alloc_bioset(GFP_NOIO, bio_segments(*bio_orig), > > + &non_cluster_bio_set); > > bio_segments(*bio_orig) may be > 256, so bio_alloc_bioset() may fail. Nothing a little min with BIO_MAX_PAGES couldn't fix. This patch was just intended as an idea how I think this code could work.
