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Subject[patch 00/10] make I/O path allocations more numa-friendly
Date
Hi,

This patch set makes memory allocations for data structures used in
the I/O path more numa friendly by allocating them from the same numa
node as the storage device. I've only converted a handfull of drivers
at this point. My testing showed that, for workloads where the I/O
processes were not tied to the numa node housing the device, a speedup
of around 6% was observed. When the I/O processes were tied to the
numa node of the device, there was no measurable difference in my test
setup. Given my relatively low-end setup[1], I wouldn't be surprised
if others could show a more significant performance advantage.

Comments would be greatly appreciated.

Cheers,
Jeff

[1] LSI Megaraid SAS controller with 1GB battery-backed cache,
fronting a RAID 6 10+2. The workload I used was tuned to not
have to hit disk. Fio file attached.

Jeff Moyer (10):
scsi: make __scsi_alloc_queue numa-aware
scsi: make scsi_alloc_sdev numa-aware
scsi: allocate scsi_cmnd-s from the device's local numa node
sd: use alloc_disk_node
vfs: pass data to alloc_inode super operation
ata: use scsi_host_alloc_node
megaraid_sas: use scsi_host_alloc_node
mpt2sas: use scsi_host_alloc_node
lpfc: use scsi_host_alloc_node
cciss: use blk_init_queue_node

drivers/ata/libata-scsi.c | 3 ++-
drivers/block/cciss.c | 3 ++-
drivers/scsi/lpfc/lpfc_init.c | 10 ++++++----
drivers/scsi/megaraid/megaraid_sas_base.c | 5 +++--
drivers/scsi/mpt2sas/mpt2sas_scsih.c | 4 ++--
drivers/scsi/scsi.c | 17 +++++++++++------
drivers/scsi/scsi_lib.c | 2 +-
drivers/scsi/scsi_scan.c | 4 ++--
drivers/scsi/sd.c | 2 +-
fs/afs/super.c | 5 +++--
fs/block_dev.c | 17 +++++++++++++++--
fs/btrfs/ctree.h | 2 +-
fs/btrfs/inode.c | 3 ++-
fs/cifs/cifsfs.c | 2 +-
fs/inode.c | 10 +++++-----
fs/ocfs2/dlmfs/dlmfs.c | 3 ++-
fs/ocfs2/super.c | 5 +++--
include/linux/fs.h | 2 +-
18 files changed, 63 insertions(+), 36 deletions(-)



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