On Mon, Jan 09, 2017 at 08:21:43AM -0800, Christoph Hellwig wrote: > Having it global is kinda weird anyway. But looking the code none > of the commands actually using is in the paging path, so it could > simply be replaced with a dynamic allocation in ata_scsi_rbuf_fill > for the actually needed size, which often will be very small, > or sometimes even 0.
Prototype here, only tested with a simple mkfs.xfs and some I/O on AHCI so far: http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/libata-kill-ata_scsi_rbuf
