diff options
author | Bart Van Assche <bvanassche@acm.org> | 2014-10-06 17:14:36 +0200 |
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committer | Christoph Hellwig <hch@lst.de> | 2014-11-12 12:05:24 +0100 |
commit | d92c0da71a35dfddccca7bfa932829504311359e (patch) | |
tree | 84b87ede947430e8b53b33bf99c349c99243cb9d /drivers/acpi/event.c | |
parent | 77f2c1a40e6fed202d08c8ec0bdca36a76dab368 (diff) |
IB/srp: Add multichannel support
Improve performance by using multiple RDMA/RC channels per SCSI
host for communication with an SRP target. About the
implementation:
- Introduce a loop over all channels in the code that uses
target->ch.
- Set the SRP_MULTICHAN_MULTI flag during login for the creation
of the second and subsequent channels.
- RDMA completion vectors are chosen such that RDMA completion
interrupts are handled by the CPU socket that submitted the I/O
request. As one can see in this patch it has been assumed if a
system contains n CPU sockets and m RDMA completion vectors
have been assigned to an RDMA HCA that IRQ affinity has been
configured such that completion vectors [i*m/n..(i+1)*m/n) are
bound to CPU socket i with 0 <= i < n.
- Modify srp_free_ch_ib() and srp_free_req_data() such that it
becomes safe to invoke these functions after the corresponding
allocation function failed.
- Add a ch_count sysfs attribute per target port.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/acpi/event.c')
0 files changed, 0 insertions, 0 deletions