be2iscsi: Fix IOPOLL implementation

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OS not responding when running 2 port traffic on 72 CPUs system.

be2iscsi IRQs gets affined to CPU0 when irqbalancer is disabled.
be_iopoll processing completions in BLOCK_IOPOLL_SOFTIRQ hogged CPU0.

1. Use budget to exit the polling loop. beiscsi_process_cq didn't honour
   it.
2. Rearming of EQ is done only after iopoll completes.

[mkp: Fixed up blk_iopoll -> irq_poll transition]

Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

...

This commit is contained in:

Jitendra Bhivare 2016-01-20 14:10:56 +05:30 • committed by Martin K. Petersen

parent 23d7ccf134

commit 1094cf68e8

4 changed files with 52 additions and 42 deletions

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2

drivers/scsi/be2iscsi/be_cmds.c

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2

drivers/scsi/be2iscsi/be_iscsi.c

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85

drivers/scsi/be2iscsi/be_main.c

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5

drivers/scsi/be2iscsi/be_main.h

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