staging: lustre: ptlrpc: Early replies need to honor at_max
authorChris Horn <hornc@cray.com>
Tue, 16 Aug 2016 20:18:53 +0000 (16:18 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 21 Aug 2016 13:57:36 +0000 (15:57 +0200)
commit31c5e95e11eadef9a10b7b1833caf75d86fb147a
tree0d8001d69f43071348ef42c180f00c8961193a68
parentc3397e7e677b1186f0442293de415f1c070b9d5d
staging: lustre: ptlrpc: Early replies need to honor at_max

When determining whether an early reply can be sent the server will
calculate the new deadline based on an offset from the request
arrival time. However, when actually setting the new deadline
the server offsets the current time. This can result in deadlines
being extended more than at_max seconds past the request arrival
time. Instead, the server should offset the arrival time when updating
its request timeout.

When a client receives an early reply it doesn't know the server side
arrival time so we use the original sent time as an approximation.

Signed-off-by: Chris Horn <hornc@cray.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4578
Reviewed-on: http://review.whamcloud.com/9100
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Christopher J. Morrone <chris.morrone.llnl@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/lustre/lustre/ptlrpc/client.c
drivers/staging/lustre/lustre/ptlrpc/import.c
drivers/staging/lustre/lustre/ptlrpc/service.c