Re: [RFCv3 3/3] iomap: Support subpage size dirty tracking to improve write performance

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On Mon, Feb 27, 2023 at 10:48:14AM +1100, Dave Chinner wrote:
> > +static void iomap_iop_set_range_dirty(struct folio *folio,
> > +		struct iomap_page *iop, size_t off, size_t len)
> > +{
> > +	struct inode *inode = folio->mapping->host;
> > +	unsigned int nr_blocks = i_blocks_per_folio(inode, folio);
> > +	unsigned first = (off >> inode->i_blkbits);
> > +	unsigned last = ((off + len - 1) >> inode->i_blkbits);
> 
> first_bit, last_bit if we are leaving this code unchanged.

first_blk, last_blk, surely?



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