Re: [RFC PATCH] fs: block_dev: compute nr_vecs hint for improving writeback bvecs allocation
From: Christoph Hellwig <hch@lst.de>
Date: 2021-01-05 18:40:43
Also in:
linux-block, linux-xfs, lkml
At least for iomap I think this is the wrong approach. Between the iomap and writeback_control we know the maximum size of the writeback request and can just use that. Take a look at what iomap_readpage_actor does on the read size, something similar taking the wbc into account can be done on the writeback side.