| commit | 994bcd28a36af1413381dfe0aac065e2cbc2af40 | |
| author | Mike Marciniszyn <mike.marciniszyn@qlogic.com> | |
| Tue, 11 Jan 2011 01:42:22 +0000 (10 17:42 -0800) | ||
| committer | Roland Dreier <rolandd@cisco.com> | |
| Tue, 11 Jan 2011 01:42:22 +0000 (10 17:42 -0800) | ||
| tree | 26f4685a39d94dbfbab346862061ef6f577653f2 | treesnapshot (tar.gz zip) |
| parent | 2a600f14d25fda341b5633c75cc50a7574fc1007 | commitdiff |
IB/qib: Issue pre-emptive NAKs on eager buffer overflow
Under congestion resulting in eager buffer overflow attempt to send
pre-emptive NAKs if header queue entries with TID errors are generated
and a valid header is present. This prevents long timeouts and flow
restarts if a trailing set of packets are dropped due to eager
overflows. Pre-emptive NAKs are currently only supported for RDMA
writes.
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Under congestion resulting in eager buffer overflow attempt to send
pre-emptive NAKs if header queue entries with TID errors are generated
and a valid header is present. This prevents long timeouts and flow
restarts if a trailing set of packets are dropped due to eager
overflows. Pre-emptive NAKs are currently only supported for RDMA
writes.
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
| drivers/infiniband/hw/qib/qib_driver.c | diffblobblamehistory |