Tony Hutter 7c9b6fed16 zvol: Remove broken blk-mq optimization ... This fix removes a dubious optimization in zfs_uiomove_bvec_rq() that saved the iterator contents of a rq_for_each_segment(). This optimization allowed restoring the "saved state" from a previous rq_for_each_segment() call on the same uio so that you wouldn't need to iterate though each bvec on every zfs_uiomove_bvec_rq() call. However, if the kernel is manipulating the requests/bios/bvecs under the covers between zfs_uiomove_bvec_rq() calls, then it could result in corruption from using the "saved state". This optimization results in an unbootable system after installing an OS on a zvol with blk-mq enabled. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Tony Hutter <hutter2@llnl.gov> Closes #15351		2023-10-24 14:37:52 -07:00
..
rpc	Silence clang static analyzer warnings about stored stack addresses	2023-03-14 15:25:01 -07:00
sys	zvol: Remove broken blk-mq optimization	2023-10-24 14:37:52 -07:00