iser-target: Disable TX completion interrupt coalescing

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commit 0d0f660d88 upstream.

This patch explicitly disables TX completion interrupt coalescing logic
in isert_put_response() and isert_put_datain() that was originally added
as an efficiency optimization in commit 95b60f07.

It has been reported that this change can trigger ABORT_TASK timeouts
under certain small block workloads, where disabling coalescing was
required for stability.  According to Sagi, this doesn't impact
overall performance, so go ahead and disable it for now.

Reported-by: Moussa Ba <moussaba@micron.com>
Reported-by: Sagi Grimberg <sagig@dev.mellanox.co.il>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

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Nicholas Bellinger 2014-10-05 02:13:03 -07:00 • committed by Luis Henriques

parent 7968b75538

commit faed75ef56

1 changed files with 2 additions and 2 deletions

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drivers/infiniband/ulp/isert/ib_isert.c

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