This topic branch covers a fundamental change in how our sg lists are
allocated to make mq more efficient by reducing the size of the
preallocated sg list. This necessitates a large number of driver
changes because the previous guarantee that if a driver specified
SG_ALL as the size of its scatter list, it would get a non-chained list
and didn't need to bother with scatterlist iterators is now broken and
every driver *must* use scatterlist iterators.
This was broken out as a separate topic because we need to convert all
the drivers before pulling the trigger and unconverted drivers kept
being found, plus the odd bug, necessitating a rebase.
The patch is available here:
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git scsi-sg
The short changelog is:
Finn Thain (2):
scsi: NCR5380: use sg helper to iterate over scatterlist
scsi: aha152x: use sg helper to iterate over scatterlist
Ming Lei (19):
scsi: core: don't preallocate small SGL in case of NO_SG_CHAIN
scsi: lib/sg_pool.c: clear 'first_chunk' in case of no preallocation
scsi: core: avoid preallocating big SGL for data
scsi: core: avoid preallocating big SGL for protection information
scsi: lib/sg_pool.c: improve APIs for allocating sg pool
scsi: esp: use sg helper to iterate over scatterlist
scsi: wd33c93: use sg helper to iterate over scatterlist
scsi: ppa: use sg helper to iterate over scatterlist
scsi: pcmcia: nsp_cs: use sg helper to iterate over scatterlist
scsi: imm: use sg helper to iterate over scatterlist
scsi: s390: zfcp_fc: use sg helper to iterate over scatterlist
scsi: staging: unisys: visorhba: use sg helper to iterate over scatterlist
scsi: usb: image: microtek: use sg helper to iterate over scatterlist
scsi: pmcraid: use sg helper to iterate over scatterlist
scsi: ipr: use sg helper to iterate over scatterlist
scsi: mvumi: use sg helper to iterate over scatterlist
scsi: lpfc: use sg helper to iterate over scatterlist
scsi: advansys: use sg helper to iterate over scatterlist
scsi: vmw_pscsi: use sg helper to iterate over scatterlist
And the diffstat:
drivers/nvme/host/fc.c | 7 ++--
drivers/nvme/host/rdma.c | 7 ++--
drivers/nvme/target/loop.c | 4 +--
drivers/s390/scsi/zfcp_fc.c | 4 +--
drivers/scsi/NCR5380.c | 41 ++++++++++------------
drivers/scsi/advansys.c | 2 +-
drivers/scsi/aha152x.c | 46 ++++++++++++-------------
drivers/scsi/esp_scsi.c | 20 +++++++----
drivers/scsi/esp_scsi.h | 2 ++
drivers/scsi/imm.c | 2 +-
drivers/scsi/ipr.c | 29 +++++++++-------
drivers/scsi/lpfc/lpfc_nvmet.c | 3 +-
drivers/scsi/mvumi.c | 11 +++---
drivers/scsi/pcmcia/nsp_cs.c | 4 +--
drivers/scsi/pmcraid.c | 14 ++++----
drivers/scsi/ppa.c | 2 +-
drivers/scsi/scsi_lib.c | 35 ++++++++++++++-----
drivers/scsi/vmw_pvscsi.c | 2 +-
drivers/scsi/wd33c93.c | 2 +-
drivers/staging/unisys/visorhba/visorhba_main.c | 9 +++--
drivers/usb/image/microtek.c | 20 +++++------
drivers/usb/image/microtek.h | 2 +-
include/linux/scatterlist.h | 11 +++---
lib/scatterlist.c | 36 ++++++++++++-------
lib/sg_pool.c | 39 +++++++++++++++------
net/sunrpc/xprtrdma/svc_rdma_rw.c | 5 +--
James
