This patchset has bounced between my ownership and that of
Hannes Reinecke and now back again. The rationale remains
the same:
- strengthen the SCSI mid-level object tree "glue" by
retiring linked lists where practical, especially the
redundant one. Use xarrays and the idr mechanism
at the host level
- make the various 'lookup' exported functions O(ln(n))
rather than O(n).
- lessen the reliance on the host_lock by making finer
grain locks available (to be done)
Version 4 of this patchset was sent to the linux-scsi list on
20200602 by Hannes with a similar subject name. That was
against MKP's 5.8/scsi-queue branch.
It had 6 parts and they form the first 6 patches of this
patchset, with minor changes since it is now based on MKP's
5.9/scsi-queue branch. The last three patches have been
added by the author, the first two have previously been
sent to the Linux-scsi list in early June.
The last patch could change the subject (adding 'hosts')
but the subject line has been kept so former patchset
versions can be more easily found.
Douglas Gilbert (3):
scsi: add starget_to_shost() specialization
scsi: simplify scsi_target() inline
scsi_host: switch ida to idr to hold shost ptr
Hannes Reinecke (6):
scsi: convert target lookup to xarray
target_core_pscsi: use __scsi_device_lookup()
scsi: move target device list to xarray
scsi: remove direct device lookup per host
scsi_error: use xarray lookup instead of wrappers
scsi: avoid pointless memory allocation in scsi_alloc_target()
drivers/scsi/hosts.c | 42 +++-----
drivers/scsi/scsi.c | 153 ++++++++++++++++++++++-------
drivers/scsi/scsi_error.c | 35 ++++---
drivers/scsi/scsi_lib.c | 9 +-
drivers/scsi/scsi_priv.h | 2 +
drivers/scsi/scsi_scan.c | 112 ++++++++++++---------
drivers/scsi/scsi_sysfs.c | 74 ++++++++++----
drivers/target/target_core_pscsi.c | 8 +-
include/scsi/scsi_device.h | 44 ++++++---
include/scsi/scsi_host.h | 5 +-
include/scsi/scsi_transport.h | 2 +-
11 files changed, 318 insertions(+), 168 deletions(-)
--
2.25.1
